Our Team

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Photo: Peter Gietz, CEO of DAASI International

Peter Gietz

Peter Gietz is co-founder, co-owner and CEO of DAASI International and has been active in the field of information technology since 1985. He is internationally recognised as an expert for directory services.

Find more information about Peter Gietz here.

Photo: Sofie Bauer

Sophie Bauer is studying law at the University of Tübingen. Since November 2018, she supports the team of DAASI International as a working student.

Sophie Bauer

Student Employee

Dr. Steffi Dobretzberger holds a degree in biomathematics and a doctorate in computer science. After many years as a software developer in finance, she has been working as a full-stack developer at DAASI International since 2024.

Dr. Steffi Dobretzberger

full-stack developer
Photo Jessica Duffka

Jessica Duffka is a certified office clerk. She joins the DAASI International team in October 2023 as assistant to the management and member of the marketing team.

Jessica Duffka

Executive Assistant

Marc Füller received his degree in business informatics from the DHBW Ravensburg, ever since he has worked as a system administrator, consultant and software developer in various fields of IT since 2011. He joined DAASI International as a consultant in May 2021.

Marc Füller

Photo: Jonathan Gietz

Jonathan Gietz joined DAASI International in 2013 and supports our team as junior developer. He succesfully graduated in IT at the University of Tübingen in 2020 with a bachelor degree and continues his study to complete his master degree.

Jonathan Gietz

Junior Developer
Photo: CFO Karin Gietz

As co-founder and co-owner of DAASI International GmbH, Karin Gietz is responsible for the areas of administration, HR, finance and accounting. Further she is an authorised officer.

Karin Gietz

Chief Financial Officer (CFO)
Mitarbeiterfoto Markus Götz

Markus Götz successfully completed his Master’s degree in Business Administration in Bamberg in 2017. Afterwards he worked as a Scrum Master and Product Owner in different software companies in Munich and Würzburg. He has been supporting DAASI International as an agile coach since 2024.

Markus Götz

Photo: Beyda Güler

Beyda Güler received a degreee in Medical Technical Informatics from Reutlingen University. Since February 2019 she supports DAASI International in the field of system administration.

Beyda Güler

System Engineer
Ali Haider Webseite

Ali Haider did his Master in Computer Science. While pursuing his studies, he joined DAASI International in 2016 as a Frontend and Backend Developer. He has expertise in Java, Python, and various IdM standards and protocols. Throughout his career, he has worked on the implementation of various enterprise applications in the financial and Identity & Access Management domains.

Ali Haider

Solutions Engineer
Photo: David Hübner

David Hübner studied Computer Science for Media in Stuttgart and Tübingen. He wrote his master thesis about Shibboleth at DAASI International. Since 2017 he has mainly been responsible at DAASI International for the EU-research projects AARC as well as SSO projects with Shibboleth, Gluu and didmos. Since mid 2023 he also is an authorised officer.

David Hübner

Senior Solutions Engineer

After training as an IT specialist, Pascal has worked in the areas of hardware and infrastructure management, network and system administration since 2012 and most recently worked as a team and project manager in the IT sector. Since 2023, he has been supporting DAASI International in the area of system administration with a focus on DevOps and realising projects in the SSO area relating to Shibboleth, Keycloak and MFA.

Pascal König

System Administrator
Photo Daniel Konzalla

Daniel Konzalla studied Media Informatics at the University of Tübingen and successfully completed his Master’s degree in 2021. He subsequently worked in IAM as a data scientist and machine learning engineer. Since 2024 Daniel works as a Solutions Engineer at DAASI International.

Daniel Konzalla

Solutions Engineer
Photo: Markus Lude

Markus Lude studied Computer Science at the University of Tübingen. After many years as a systems engineer at a system house, he has been working as a system administrator for DAASI International since September 2019.

Markus Lude

System Administrator
Photo: Sven Lukrafka

Sven Lukrafka joined DAASI International in spring 2018 for an internship within his course of study at the University of Tübingen and stayed with the company as a working student thereafter. Since 2019, he supports the team as a software developer and junior consultant.

Sven Lukrafka

Photo Nasim Niyar

Nasim Niyar obtained her master’s degree in 2022. After getting trained and oriented as a developer, she began an internship at DAASI International in November 2023. Since March 2024, she supports the team as a junior backend developer.

Nasim Niyar

junior backend developer
Photo: Pia Schäfer

Pia Schäfer has started her studies in Computer Science in 2016 and has been supporting DAASI International since then in the field of system administration and software QA.

Pia Viktoria Schäfer

System Administrator
Team member: Werner Schledorn

Werner Schledorn has joined DAASI International as a system engineer in June 2022. Werner contributes over twenty years of professional experience, which he was able to gather at various stations and over many years of self-employment. His expertise encompasses both hardware and software; he is especially well versed in all subjects relating to operating systems and virtualisation environments.



Werner Schledorn

System Engineer
Photo: Benedikt Schnabel

Benedikt Schnabel studied Mathematics and Computer Science at the University of Tübingen. He joined the team of DAASI International in January 2016. Since then, he has been responsible for frontend development and the GUI of didmos LUI as well as the conception and implementation of the current website of DAASI International.

Benedikt Schnabel

Frontend Developer
Photo: Christopher Tomas

Christopher has been working as IT-consultant for software projects since 2005. In the beginning he was involved in development, giving him a lot of experience in regards to all topics related to development. Later, he would become a QA specialist. Starting in 2020, Christopher now supports DAASI International in the field of DevOps.

Christopher Tomas

System Engineer
Photo: Jennifer Vosseler

Jennifer Vosseler studied German Literature and Media Science at the University of Tübingen and is a member of the team of DAASI International since April 2017. At home in our marketing department, she is responsible for the planning, implementation and communication of our marketing strategy.

Jennifer Vosseler

Head of Marketing
Photo: Markus Widmer

Markus Widmer studied Computer Science at the University of Tübingen and completed his diploma thesis on Role-Based Access Control at DAASI International. Since 2005, he has written large proportions of didmos and other products of DAASI International. He is procurator, Head of Hosting and Support Department, expert in OpenLDAP, RBAC and SPML, and has the technical responsibility in many IAM projects.

Markus Widmer

Chief Technical Officer (CTO)
Photo: Julian Wolff
Julian Wolff successfully completed his degree in Bioinformatics at the University of Tübingen in 2023 and supports DAASI International in system administration, development and quality assurance.


Julian Wolff

Software Engineer
Photo: Tamim Ziai

As a graduate of Computer Science, Tamim Ziai can look on decades of IT experience, with particular expertise in software design, Java frameworks and quality assurance. He joined DAASI International as a Senior Consultant in 2011.

Tamim Ziai

Senior Consultant
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