Executive board

As Chief Process Officer at TestSolutions GmbH, Florian Fieber is responsible for the test process management of the entire organization as well as the entire training area with the “QualityDojo – TestSolutions Academy”. He has been working in the field of quality assurance for software systems for almost 20 years and has (co-)founded several training and consulting companies during this time. His focus as a consultant and trainer is on test management, test process management and test process improvement.

After studying media informatics and information systems, he initially worked as a software developer for enterprise applications and as a research assistant at the Berlin University of Applied Sciences. Since then, his focus has developed from test analysis and test automation to test management and process improvement and today encompasses all quality assurance aspects of the entire software life cycle. Mr. Fieber has been active as a trainer for “ISTQB Certified Tester” seminars since 2006 and during this time has developed various seminar contents and led numerous seminars for ISTQB Certified Tester Foundation Level as well as the Advanced Levels.

Mr. Fieber joined the GTB to further develop and establish the Certified Tester Scheme. He was Deputy Chairman from 2020 to 2022 and has been Chairman of the GTB since 2022. He is also involved as head of the Acceptance Testing working group and deputy head of the Glossary working group as well as in the Agile and Mobile working groups. At the ISTQB, he has headed the “Testing in Particular Domains” working group since 2024.

Dr. Klaudia Dussa-Zieger has been working intensively on the topics of software testing and software quality for over 25 years. She is convinced: “Given the increasing complexity of modern software systems and our high standards of quality and security, development without testing is no longer conceivable.”

She is particularly interested in testing artificial intelligence and with artificial intelligence, the continuous optimization of test processes, and the professional training and further education of software testers. She has been active as a trainer for the ISTQB® Certified Tester Foundation and Advanced Level for more than two decades, passing on her extensive practical experience.

Since March 2009, Klaudia Dussa-Zieger has been chairwoman of the DIN working committee “System and Software Engineering” and is also involved in international standardization work. The development of the test standard ISO/IEC/IEEE 29119 is just one of the topics she is involved in within this framework.

Since 2013, she has been actively involved in the German Testing Board (GTB) and has supported the board in numerous roles. She is currently one of the vice-chairpersons of the GTB.

Since 2023, she has been president of the ISTQB® and heads the “Certified Tester AI Testing” task force there.

Dietrich Leimsner likes to talk about the tester’s “dirty imagination”, which cannot be replaced by machines, when he explains why, even in times of test automation and AI-supported test case generation, the human element of the trained software tester must not be missing in comprehensive software quality assurance.

He has been working at DB Systel GmbH, a Deutsche Bahn AG company, since 1999. With the ticket vending machines, which were still quite new at the time, he became familiar with the appeal and challenges of comprehensive quality assurance directly at the interface between the digital (the sales data record) and the physical (the actual ticket). As a result, he has been working exclusively on this topic in various large systems with board and customer visibility since 2006.

In 2014, Dietrich Leimsner took over the design and further development of DB Systel’s test process and responsibility for the associated methods and tools. In this context, he now deals with the challenges of software quality assurance and how this is perceived when the company reorganizes its structure and project organization according to agile principles.

Dietrich Leimsner has been deputy chairman of the GTB since 2022 and is involved in the working groups Professional Profile Tester, Glossary and Business Development. He also actively represents GTB and DB Systel in the specialist group “Test, Analysis and Verification of Software” (TAV) of the German Informatics Society (GI) and represents GTB on the Board of Trustees of the German Award for Software Quality (DPSQ).

Dr. Armin Metzger was interested in software quality assurance already during his years of study. Even the degree dissertation for his doctor’s degree in physics dealt with testing subjects such as stochastic testing.
Working for the IT service provider sepp.med GmbH from 1999 to 2005, Dr. Metzger remained true to the general subject of “quality“ in varying fields of activity within the software quality assurance and development processes. As departmental head and member of the executive board at sepp.med, Dr. Metzger was responsible for business development and for large service projects in the field of complex and safety-critical IT.
Since 2016, Dr. Armin Metzger has devoted himself to the topic of software quality in full-time committee work. Until spring 2018, he supported the Arbeitskreis Software Qualität und Fortbildung (ASQF e.V.) as Director, and since April 2018 he has been Managing Director of the German Testing Board e. V. In this capacity, he has set himself the objective of advancing the content and organizational development of the association and a further opening towards new and changing target groups, in order to facilitate work that is more specifically targeted to the requirements of both universities and the market and society. Dr. Metzger sees the key to this in intensifying the partner network of the GTB with its premium providers and certification bodies: “The quality of the Certified Tester in Germany has been supported for many years by the quality in the partner network. This now needs to be exploited and expanded even more intensively.”
In his industry and research projects, Dr. Armin Metzger realized that the testing of software is an important and ever recurring task, whilst at the same time university training and training standards in the industry often leave a lot to be desired. This was one of the reasons why Dr. Metzger decided to become involved with the German Testing Board from the very start when it was being established.
Dr. Metzger keeps coming back to the subjects of effective and efficient processes and the practical relevance of testing know-how. He sees this as the basis for the industrial implementation of innovations and scientific results. To him, the GTB is an important platform for software testers to receive the knowledge they require, not only for their day-to-day work, but also for coping with new challenges. To this end, he feels that the GTB also contributes to the quality and efficiency of software development projects as important success factors for a sustainably successful business location Germany.
In his view, the GTB has already made a significant contribution to spreading the know-how about practical testing. He now wishes for a stronger national and international interlinking with the other relevant associations and organizations. His objective is that the Certified Tester standards worldwide will ultimately enhance the quality and efficiency in the development of IT systems.