Univention Summit 2027 | The Open Source Event for Digital Sovereignty

Jutta Horstmann

Co-CEO of the Heinlein Gruppe

Jutta Horstmann is a computer scientist, entrepreneur, and open source expert. Since September 2025, she has been serving as Co-CEO of the Heinlein Gruppe, enabling companies and public institutions to achieve digital sovereignty, security, and sustainability. With more than 25 years of experience in IT and leadership, she is a strong advocate for digital resilience and open source technologies.

Frank Karlitschek

Founder and Managing Director Nextcloud

Frank Karlitschek is the founder and Managing Director of Nextcloud GmbH. The IT specialist from Berlin developed open source software for over 25 years and was active on the KDE board. He founded initiatives such as the “User Data Manifesto” (2015), which called for data protection in the cloud at an early stage. In 2016, he founded Nextcloud, a European open source alternative to US and Chinese cloud services. He has spoken as a keynote speaker at MIT and advises the UN on open source.

Zehra Öztürk

Acting Head of Division

Zehra Öztürk is acting head of department at the Hamburg Senate Chancellery, where she is working to make the IT landscape of Hamburg’s administration – and beyond – more future-proof and enhance it with new technologies such as AI. She campaigns for greater diversity and is committed to digitalization, including at Re:form. She initiated the Co-Pioneer Award for reuse.
As a graduate computer scientist, she first worked in the field of AI before finding her calling in Hamburg’s administration.

Dr. Dirk Gernhardt

Open Source Officer for the City of Munich

Dr. Dirk Gernhardt has been Open Source Officer for the City of Munich since 2023 and has headed the Competence Center Software Engineering in the IT Department since 2019. Before becoming Chief IT Architect for the City of Munich in 2010, he worked as a Senior Application Architecture Consultant at Capgemini for various companies.

Emma Ghariani

Director of the Open Source and Digital Commons Unit, Interministerial Directorate for Digital Affairs (DINUM)

Emma Ghariani is the Director of the Open Source and Digital Commons division at the French Interministerial Delegation for Digital Affairs (DINUM). She is focused on developing and supporting meaningful public-commons cooperations in France and Europe. Emma is passionate about social and digital innovations, and she holds degrees from Sciences Po and the National Institute of Oriental Languages and Civilizations.

Inga Zeisberg

Head of the Digital Education Unit at the Office for Schools and Continuing Education of the City of Münster

As head of the Digital Education department at the Office for Schools and Continuing Education, I work with 10 employees to shape the digital transformation of the city’s school landscape and fulfill the school authority’s responsibilities. With the DigitalPakt Schule funding program, we equip schools with state-of-the-art digital presentation technology and mobile devices that meet the educational concepts of the schools. In the digital lab, we strengthen teachers’ digital skills and reduce digital barriers.

Ernst Mayer

Coordinator, InnoLab im Zweckverband Kommunales Rechenzentrum Niederrhein (KRZN)

Ernst Mayer has been with the Kommunales Rechenzentrum Niederrhein (KRZN) for over 40 years, where he has worked as an IT service provider for city, municipal and district administrations in the areas of application development and consulting, system engineering, project management and department management. He currently coordinates the KRZN InnoLab, where in particular new technologies and ways of working are evaluated for their potential use in municipal administrations.

Dr. Martin Hagen

State Councillor – Senator for Finance of Bremen

Dr. Martin Hagen has been State Councillor for Budget, Human Resources, and Digitalization at the Senator for Finance of the Free Hanseatic City of Bremen since 2020. He studied in Hamburg and Illinois and earned his doctorate in Bremen with a focus on e-government. Since then, he has supported, steered, and been responsible for the digitalization of Bremen’s public administration in various roles. He is a member of the IT Planning Council and Bremen’s permanent representative to the Conference of Digital Ministers.

Bärbel Boy

Managing Director, boy | Strategie + Kommunikation GmbH

Bärbel Boy is an entrepreneur and expert in transformation, a strategy and communications consultant, an AI organizational advisor, and a social researcher. As founder and partner of boy | Strategie + Kommunikation GmbH, she has been developing strategies for societies in transition for 25 years. With around 40 employees, the company operates offices in Berlin and Kiel. In addition, she has developed, among other things, a tool for measuring the transformation competence of organizations and regions.

Monika Hochmuth-Álvarez

Managing Director, ESDi GmbH / Board Member, ESDiG eG

It all began with the voluntary founding of a school. Professional experience in IT consulting and the vision of making the core subject Humanity accessible to everyone in the educational landscape form the foundation of my work. At ESDi – Evangelische Schule DienstleistungsGmbH, we support our schools in their daily routines and build systems and networks that, in the background, enable and strengthen the core tasks of schooling.

Karam Kharrat Helou

Projektmanager für IT-Infrastruktur, Bergwerk IT

Karam Kharrat Helou ist derzeit als Projektmanager für IT-Infrastruktur bei Bergwerk-IT tätig. In dieser Rolle verantwortet er die Planung, Steuerung und Koordination von IT-Infrastrukturprojekten für Kunden, darunter Server-, Netzwerk- und Cloud-Umgebungen.

Alexander Rosenthal

Head of DigitalHub.SH

Alexander heads the DigitalHub.SH, serving as a central hub between the state government, municipalities, civil society, and the business community. Together with his team, he supports the State Chancellery of Schleswig-Holstein in implementing the state’s digitalization strategy. After years in the private sector, he now focuses particularly on digital sovereignty and the consistent use and promotion of open-source technologies.

René Müller

Apple Education Business Manager

He has been working in the field of school IT for over 20 years. Previously, he was active as an IT consultant and managing partner of an IT service provider with a focus on the education sector. Since 2019, he has been part of the CANCOM Public Education team, where he is responsible nationwide for the topic of Apple in education.

In his role, he acts as a link between sales colleagues, customers, and manufacturers. His responsibilities include strategic consulting as well as managing strategic customers and framework agreements.

Timo König

Solution Lead Sovereign Workplace, Bechtle

Timo König makes digital sovereignty tangible for customers—in everyday life, in workflows, on devices. As Solution Lead Sovereign Workplace at Bechtle, he develops solutions for the sovereign workplace in collaboration with public organizations, brings movement to cumbersome IT structures, and uses open source to ensure digital independence where it is needed—among users. He always keeps the question in mind: What good is the best foundation if no one can work with it? Where does autonomy end when specialized procedures and cloud solutions don’t mesh? He is convinced that sovereignty is what makes everyday life easier – not what looks good on paper.

Dr. Jörn Dreyer

Principal Architect, OpenCloud

Jörn Dreyer lives in Hanover and has been working for many years at the intersection of people and technology. Trained as a business informatics specialist and computer scientist, and holding a PhD in software engineering, he translates complex technologies into practical, user-focused solutions. With experience in development, architecture, and customer-facing roles, he has been supporting OpenCloud customers since 2025 in using the platform efficiently and turning real-world requirements into practical solutions.

Frank Hoberg

Chief Sales Office and Co-Founder Open-Xchange

Frank Hoberg co-founded Open-Xchange in 2005. Since then, he has held various senior leadership positions, with a strong focus on international expansion into the European market as well as establishing Open-Xchange in the United States and the APAC region. He built partnerships with major web hosting and telecommunications companies in Europe, the United States, and APAC, always focusing on the development of successful business models together with these partners. Currently, he is involved in building and expanding the Public Sector business unit at Open-Xchange.

Daniel Zielke

Director of Strategic Partnerships, OpenTalk

Daniel Zielke is Director of Strategic Partnerships at Opentalk GmbH and for the Heinlein Group, one of Germany’s leading open-source software and service companies. After working in journalism and politics, he focused on public procurement and the digital transformation of public administration, contributing his expertise in various open-source companies and industry associations. He is also a lecturer and advises public institutions on digital sovereignty, process digitalization, change management, and procurement process optimization.

Philipp Schied

Managing Director Medienkompetenzlehrer MKL GmbH

Philipp Schied is a teacher who teaches German, social studies, Protestant religious education, and computer science at a secondary school in Rhineland-Palatinate. As a founder of Medienkompetenzlehrer, he and his team are committed to teacher training across Germany and have trained more than 10,000 teachers in recent years. In addition to professional development, he also supports school leadership teams and school authorities in implementing digitalization projects.

Jonas Kolbenschlag

Managing Director Medienkompetenzlehrer MKL GmbH

Jonas Kolbenschlag is a teacher who teaches biology, physical education, and general science at a secondary school in Rhineland-Palatinate. As Managing Director of Medienkompetenzlehrer MKL GmbH, he and his team are committed to teacher training across Germany and have trained more than 10,000 teachers in recent years. In addition to professional development, he also supports school leadership teams and school authorities in implementing digitalization projects.

Martin Jacobs

Head of IT Support for Schools, KRZN

Martin Jacobs lives in Dinslaken and has been with KRZN since 2018, becoming head of IT support in schools in 2024. Thanks to his many years of professional experience in IT and as a father, he understands the challenges of everyday school life from a variety of perspectives.

Peter Rost

secunet Security Networks AG|Director Business Development

Peter Rost is Director of Business Development for Civil Public Administration at secunet. Since joining the IT security industry, he has been developing business with sovereign encryption and identity solutions for the end device, network, and cloud infrastructure of public administration. Prior to this, he managed the global business with embedded processors and DRAMs from German chip manufacturers. Peter Rost studied in Darmstadt and Grenoble and lived in Tokyo for a time. He is involved in associations and initiatives, including BITKOM, TeleTrusT, OSBA, Plattform Lernende System, CAST, and the Berlin Chamber of Commerce and Industry.

Lea Telle

Senior consultant, ifib

Lea Telle has been working as a senior consultant for ifib consult GmbH since 2018. She provides consulting services in the field of public administration with a focus on the education sector. Her areas of expertise include media education and media literacy, participation procedures, media development planning, equipment planning with cost calculation, digital culture in an educational context, media development planning, and open educational resources (OER).

Lena Wollenberg

Research associate, ifib

Lena Wollenberg has been a research assistant at ifib since 2021. As a sociologist, her focus is on examining inequalities in the education system. During her master’s degree at the University of Bremen, she focused primarily on quantitative survey and evaluation methods. As part of the ODIkS joint project, she is responsible for research and evaluation.

Mark Neufurth

Enterprise Strategist Public Sector, IONOS SE

Mark Neufurth is Enterprise Strategist Public Sector at IONOS SE. Mark is actively driving initiatives such as SECA API (Sovereign European Cloud API) for the greater benefit of uniting European Cloud IT forces to level up Europe’s digital independence and emancipation. As Enterprise Strategist, he engages into discussion with all responsible DMUs within the public-sector IT.

Previously, he acted as Product Marketing Expert and Lead Strategist Marketing for IONOS Cloud Services. He has almost 30 years of market experience in web hosting and cloud IT.

Dipl.-Ing. Jörg Lorenz

CEO, ITIS AG

Jörg combines visionary thinking and strategic foresight with strong digital expertise gained through years of leadership as a CEO. With decades of experience in enterprise software development, both in the open source world and previously in the Microsoft ecosystem, he shapes sustainable, European, and cost-efficient digital solutions and consistently drives innovation forward. His focus is on future-oriented business models, technological excellence, and the long-term success of your IT initiatives and target audiences.

Christopher Lorenz

CTO, ITIS AG

Christopher Lorenz is CTO and Head of Data Center Operations at ITIS AG. With many years of experience as a technology leader, he ensures the highest levels of security, performance, and stability for ITISeasy solutions, ranging from open source ERP to secure hosting.

Emanuel Holzmann

Managing Director, H2 invent

Emanuel Holzmann is the founder of H2 invent GmbH and responsible for software development. He oversees key solutions such as meetling—the highly secure video conferencing solution designed specifically for public authorities—and SKiB, a digital platform supporting open all-day childcare. He is also involved in the OSBA as deputy spokesperson for the Working Group Security, where he contributes his expertise in secure and sovereign IT.

Felix Kronlage-Dammers

Head of SCS Standards Forum / Project Manager ECO:DIGIT @ OSBA

Felix Kronlage-Dammers heads the SCS Standards Forum of the Sovereign Cloud Stack, an open framework for sovereign cloud infrastructures, and is a project manager in the ECO:DIGIT project of the OSBA. Previously, he was the founder and managing director of bytemine GmbH as well as COO of gridscale, bringing extensive business experience with him. He has been developing open source for more than 20 years and is active in NGOs and on the extended board of the OSBA.

Zentrum für Digitale Souveränität der Öffentlichen Verwaltung (ZenDiS) GmbH

Leonhard Kugler

Head of Platform & Development, ZenDiS

Leonhard Kugler — Head of the ZenDiS Platform for Digital Sovereignty openCode — brings more than 20 years of experience in IT, digitalization, and organizational development. As the head of openCode, he is building the development infrastructure for the public sector in a way that enables sustainable, sovereign, secure, and accelerated digitalization. openCode encompasses both software supply chain infrastructure and the reuse of digital solutions.

Andre Gülzow

Subject Specialist for School IT in Wolfsburg

Andre Gülzow works in the Schools Division of the City of Wolfsburg as part of the School IT team. He is responsible for the strategic development of the digital infrastructure and media education at around 35 schools, with a focus on educational equity and practical solutions for school authorities and schools.

Robin Pfaff

Deputy Head of Division for the State of Schleswig-Holstein

Robin Pfaff works for the state of Schleswig-Holstein, where he has taken the topic of “UX in public administration” under his wing. As project manager, he is driving forward the KERN project, which aims to create a UX standard for public administration in Germany. He is passionate about creating a digital state that is simple, intuitive, and accessible for all citizens and businesses.

Volker Everts

Information Technology Consultant bei Dataport

Volker Everts has been working at Dataport for ten years, initially as a solution architect and now as the person responsible for the product group covering identity and access management and directory services. In this role, he is also responsible for the functional and commercial development as well as the future operation of the open-source-based directory service in Schleswig-Holstein. He has been involved in this project from the very beginning, starting in spring 2022.

Isabell Pietta

Consultant Digital Transformation, Dataport

Isabell Pietta has been designing digital solutions for users for 15 years and works at Dataport. As Business Development Manager at KERN, she drives the product vision and its community-centered implementation—an open UX standard that enables cohesive digital public administration solutions. She is particularly passionate about cross-level collaboration with stakeholders who are committed to user-centered public sector transformation and the development of shared, cost-efficient solutions

Thorsten Behrens

Managing Director Germany

Thorsten became the Managing Director of Collabora Productivity Germany after the merger of allotropia software GmbH in May 2025. He is an application developer in C, C++, Python and Java, a computer scientist and self-confessed “standards wonk” with over 20 years of experience in the LibreOffice and OpenOffice.org code base. He was one of the founders of The Document Foundation, the LibreOffice project and former member of the OASIS Open Document Format (ODF) technical committee.

Michael Astenwald

Head of IT Department / pro mente tirol

Michael Astenwald studied geography at the University of Innsbruck, where the foundation was laid for his inclination toward open source. For many years, he worked as a self-employed IT entrepreneur, administering and advising small and medium-sized businesses across various industries, until he took over as Head of IT at pro mente tirol in 2014. There, he established a hybrid network of open-source and proprietary software, with a primary focus on open source. As a true Tyrolean, he always has to find time to get into the mountains.

Jochen Ortling

Head of School-Specific Applications

Jochen Ortling has been working since 2011 in the “Schools” product area of the City of Cologne’s Department of Digitalization and Information Technology. In addition to providing central specialized applications for the administrative departments of schools, he and his team, together with the city’s support partner NetCologne ITS, focus on the ongoing development of IT infrastructure and services for pedagogical work in Cologne’s schools.

Werner Fischer

Board of Directors @ LPI / Knowledge Transfer @ Thomas-Krenn.AG

Werner Fischer brings Linux to schools. He has been with Thomas-Krenn since 2005, where he has written over 1,000 articles for the Thomas-Krenn Wiki and co-founded the Thomas-Krenn Linux User Group (tklug). He took his first LPI exam in 2003. He now volunteers on the Board of Directors of the Linux Professional Institute, where he is particularly committed to the topic of “school & education.” As an LPI Channel Partner, he supports schools in integrating Linux into their teaching.

Johannes Albani

Development Team Linux, LMZ

Johannes Albani is a secondary school teacher of mathematics and computer science at the vocational schools in Achern and has been an administrator for school IT using the paed.ML server based on UCS@school since 2016.
He has been working at the State Media Centre of Baden-Württemberg since 2017, contributing to the further development of paed.ML. Through this dual role, he is also responsible for facilitating the exchange between customer and school requirements and the development team.

Ulrich Hollritt

Head of Sales and Customer Service, LMZ

Ulrich Hollritt has been working for many years at the State Media Centre (LMZ), advising schools and school authorities.
He provides comprehensive consulting and support to customers on all aspects of the implementation and rollout of paed.ML.

Anna Mohn

Head of Marketing at OpenProject

Anna Mohn is Head of Marketing at OpenProject and has more than 15 years of experience in leadership roles in IT companies. She focuses on communicating open source and digital sovereignty and their importance for modern, trustworthy digital collaboration. At OpenProject, she works to highlight the contribution of the leading open-source project management solution to European alternatives for digital collaboration.

Christian Herzog

Managing Director, EXTRA Computer GmbH; First Chairperson, ITE e. V.

Christian Herzog is Managing Director of EXTRA Computer GmbH and a founding member as well as the first chairperson of the Association for IT from Europe (ITE). He is driven by the vision of a sovereign European IT industry, both through EXTRA Computer, one of Germany’s leading PC manufacturers known especially for its high-quality, German-made industrial PC solutions, and through his work with ITE, where he is advancing the idea of a “IT from Europe” quality label.

Jonas Sterr

Senior Solution Engineer Proxmox & Ceph

As an open source expert, Jonas Sterr is responsible for the Proxmox portfolio at Thomas-Krenn.AG. Over the past four years, he has overseen numerous Proxmox server projects and further developed the product offering. His extensive work with Proxmox VE and Ceph has given him deep expertise in these technologies, knowledge he shares with great enthusiasm.

Bernd Lehmann

City of Siegburg, CDO/Head of Department

Bernd Lehmann is Head of Department of the City of Siegburg and is responsible for key administrative functions within the municipal administration. His core areas of responsibility include organization, digitalization, and IT. In addition, he is largely responsible for the central coordination as well as the strategic and operational development of school IT in Siegburg. This includes both the technical infrastructure of schools and the further development of digital education services.

Sebastian Klost

Head of the Chemnitz School Computing Center

With his training as an IT specialist and his studies in telecommunications informatics, he turned his hobby into his profession. After ten years of IT service experience in an international company, he has been working at the Chemnitz School Authority since 2019. As head of the school computer center, he and his team support 80 schools in the daily challenges of digitization. A major factor in their success is their close cooperation with the Chemnitz Media Education Center.

Fabian Kalweit

Software Developer & IT Consultant

Fabian Kalweit has been working at uib GmbH since 2020 in the areas of backend development and consulting. A key focus of his work is supporting schools and educational institutions, for which he develops technical concepts and assists with their implementation.

Eric Fischer

Technical Project Manager

Eric studied Business Informatics and worked as a developer as well as a process- and project manager in the public sector before joining us. He loves working with technical and business people and is always eager to understand requirements and find great solutions. In his spare time he’s a DJ and music producer, a track & field athlete and event manager for sports events.

Dennis Kalbhen

Director of Technical Services, OpenTalk

Dennis Kalbhen works as Director of Technical Services on the video conferencing solution OpenTalk. Dennis sold his first web application at the age of 16 and has been programming his way through all kinds of scripting and high-level languages ever since. Later, he moved to a systems integrator, supporting customers and projects in the areas of security/firewall/routing and various custom-built solutions. The FOSS mindset brought him to our Linux company, where he is happy to support you as an advocate of the KISS principle and modern solutions.

Stefan Bogner

Linux Consultant & Trainer

Stefan Bogner has been working as a Linux Consultant and Trainer at B1 Systems GmbH since 2016. His main areas of focus are system and configuration management and deployment. In these fields, he develops and supports customer solutions and delivers trainings and workshops.

Jens Lehle

Sales Manager

Jens Lehle has been working as a Sales Manager at Relution GmbH for four years, specializing in the public, education, healthcare, and business sectors. In this role, he advises and supports institutions and companies comprehensively on all matters related to Relution. He assists them with implementation and optimization, whether in new or existing infrastructures.

Stefan Jauker

CTO and Managing Director, Relution

Stefan Jauker is Chief Technology Officer (CTO) and part of the management team responsible for the technological direction at Relution GmbH.

Clément Aubin

Head of Sales and Professional Services at XWiki SAS

Passionate web developer and hacker at heart, with a strong interest in Open Source Software. Clément has been involved at XWiki SAS since 2017, from the development of the XWiki Software, to the leadership of our services team. Today, you can also find him contributing to the OW2 board, the FOSDEM organization, or making pull requests to OpenFoodFacts and Passbolt.

Jochen Stöckmann

Digitalization Team, Caritas in the North

Jochen Stöckmann works in the digitalization department at Caritas in northern Germany. He deals with the question of where digitalization is located and what it does. The aim of his work is to successfully connect people in need and employees with digitalization, IT, and networks. The goal is to realize a vision and not just blindly grab any software because everyone else has it.

Karam Kharrat Helou

IT Infrastructure Project Manager, Bergwerk IT

Karam Kharrat Helou currently works as a project manager for IT infrastructure at Bergwerk-IT. In this role, he is responsible for planning, managing, and coordinating IT infrastructure projects for customers, including server, network, and cloud environments.

Robert Siedl

CEO Siedl Networks GmbH

Robert Siedl is the CEO of Siedl Networks GmbH, which has been implementing enterprise open-source systems for IT infrastructures and collaboration services for almost 25 years, systems that are digitally sovereign and meet high security standards.

Sebastian Gille

Infrastructure Administrator, Media Center Jena

Sebastian Gille works at the Media Center of the City, where he manages the entire infrastructure with all active components for Jena’s school landscape. A particular focus lies on security and efficiency. In his presentation, he will demonstrate how this can be implemented within the Univention system.

Peter Jerie

Head of the Media Center Jena

Peter Jerie heads the Media Center, whose task is to equip Jena’s schools with a modern and manageable IT landscape. This is achieved with a strong team, a clear strategy, and a system that provides the necessary implementation and design options.

Daniela Grebe

Teamlead Product Management Univention

Daniela Grebe has been responsible for the product management team at Univention since the end of 2024. With a strong background in data-driven product strategy, B2B software and machine learning, she focuses on strategies and products that help organizations maintain their digital sovereignty in a world where data and infrastructure are increasingly monopolized. With her interdisciplinary experience, from AI-based solutions to the gaming industry, she brings creative problem solving and new perspectives to product development. Her goal: to translate complex technologies into practical, value-adding solutions.

Ingo Steuwer

VP Platform & Technology Univention

Already while studying computer sciences at the University of Bielefeld, Ingo has been working on the deployment of Open Source infrastructures in small and medium-sized enterprises. From 2000 until 2004 he was Managing Director of a software consulting company. He joined Univention in 2004, initially working in product development. From 2006 onwards, he was responsible for Professional Services. He has been VP Platform & Tecnology team since January 2022.

Cord Martens

Director Business Development, Univention

Cord Martens has been working with Univention GmbH in various roles since 2004 and, over the years, has supported a wide range of projects and cooperation partners in successfully using Univention software.

Stefanie Schneider

Head of Professional Services, Univention

Stefanie Schneider studied physics at the University of Bremen before specializing in IT and open source software projects at Univention. She has been with the company since 2018, initially as an Open Source Software Consultant and later as a Team Lead. Since 2026, she has been responsible for all Professional Services at Univention as Head of Professional Services.

In her work in Professional Services and direct customer engagement, her particular focus is on creating the foundations for successful projects, inspiring customers in the long term, and jointly developing tailored technical solutions.

Michael Repke

Product Manager Education Strategy, Univention

Michael Repke is responsible at Univention as Product Manager for the strategy in the education sector. With many years of experience in the IT industry and the public sector—from studying to become a teacher, to working in youth support at the Berlin Youth Welfare Office, to digitizing various projects as a consultant at the Ministry of Education, Youth and Sports of Brandenburg—he combines pedagogical and education policy expertise with technical know-how.

Daniel Tröder

Software Architekt Univention

Daniel Tröder is a software architect at Univention. He used to be a developer in the UCS@school and mail server area. Motto: Spread possibilities, not dependencies.

Felix Botner

Software-Developer, Univention

Felix Botner was born in Leipzig and first came into contact with Linux and open-source software in 2000. He has been working at Univention in Bremen since 2008, where he is a software developer focusing on identity management, Samba, and the AD/S4 Connector.

Silke Meyer

IT-Consultant, Univention

Silke has been working at Univention since 2023. As an IT consultant, she supports customers with the implementation of their Nubus projects. At the moment her focus is on the topic of Single Sign On.

Dirk Wiesenthal

Open Source Software Engineer, Univention

Dirk is an open source software engineer at Univention. He is primarily responsible for maintaining and further developing the Univention App Center.

Johannes Lohmer

Open Source Software Engineer, Univention

Johannes Lohmer has been working as a software developer at Univention since summer 2024, after completing his three-year apprenticeship there. He has been part of the Nubus for Kubernetes team since summer 2023, with a particular focus on the Provisioning Stack. His motto: Curiosity without limits.

LET’S CONNECT!

The Univention Summit – Tradition & Innovation

What Will Be Discussed in 2027

Networking Takes Center Stage

Alte Werft Bremen – Where Industrial Heritage Meets Modernity

Main Stage

Public & Edu Stage

Tech Stage

Impressions

What the Summit Participants Say

These Were the Speakers 2026

Peter Ganten

Peter Ganten

Ann Cathrin Riedel

Ann Cathrin Riedel

Milen Starke

Milen Starke

Mario Schmid

Mario Schmid

Jutta Horstmann

Jutta Horstmann

Frank Karlitschek

Frank Karlitschek

Zehra Öztürk

Zehra Öztürk

Dr. Dirk Gernhardt

Dr. Dirk Gernhardt

Emma Ghariani

Emma Ghariani

Inga Zeisberg

Inga Zeisberg

Ernst Mayer

Ernst Mayer

Dr. Martin Hagen

Dr. Martin Hagen

Bärbel Boy

Bärbel Boy

Mark Rackles

Monika Hochmuth-Álvarez

Monika Hochmuth-Álvarez

Prof. Dr. Matthias Stürmer

Karam Kharrat Helou

Alexander Rosenthal

Alexander Rosenthal

René Müller

René Müller

Timo König

Timo König

Dr. Jörn Dreyer

Dr. Jörn Dreyer

Frank Hoberg

Frank Hoberg

Christian Ulmitz

Daniel Zielke

Daniel Zielke

Philipp Schied

Philipp Schied

Jonas Kolbenschlag

Jonas Kolbenschlag

Martin Jacobs

Martin Jacobs

Peter Rost

Peter Rost

Lea Telle

Lea Telle

Lena Wollenberg

Lena Wollenberg

Mark Neufurth

Mark Neufurth

David Brunner

Dipl.-Ing. Jörg Lorenz

Dipl.-Ing. Jörg Lorenz

Christopher Lorenz

Christopher Lorenz

Emanuel Holzmann

Emanuel Holzmann

Felix Kronlage-Dammers

Felix Kronlage-Dammers

Leonhard Kugler

Leonhard Kugler

The Univention Summit –
Tradition & Innovation

What the
Summit Participants Say