The German Testing Board is a working group of software and system testing specialists. Its members include recognised experts from industry, consultants, trainers, scientists and specialists from other organisations.

The German Testing Board is an independent, neutral commission, which is responsible for the quality of the Certified-Tester system and the associated examination procedures in Germany. It also supervises the Certified-Tester training courses, monitoring defined criteria and awarding accreditations to the training institutions.

All the members of the Board are unpaid volunteers with practical experience.

Within the German-speaking world, the GTB cooperates closely with the Austrian Testing Board and the Swiss Testing Board.

For the TTCN-3 certificate, the GTB cooperates closely with the European Telecommunication Standards Institute (ETSI), which develops the TTCN-3 standard.

At an international level, the German Testing Board is a founder member of the umbrella organisation " International Software Testing Qualifications Board ". This group is responsible for the consistency and comparability of the teaching and testing content in all participating countries.