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Stefan RoockCertify Stefan Roock

  • login: roock
  • address:

    akquinet it-agile GmbH
    Paul-Stritter-Weg 5
    D-22297 Hamburg

Certifications Received

Johannes Link certifies that Stefan Roock is, at a minimum, qualified to teach others the skill of Agile Development, based on this evidence:

I have seen him give worthwhile talks and good classes about Agile Development and Extreme Programming. Moreover he is coauthor of a popular book on the topic.


Jens Coldewey certifies that Stefan Roock is, at a minimum, qualified to teach others the skill the ideas of agile development, based on this evidence:

I have heard great talks of him and had several private conversations in which he convinced me that he both understands agile development and is able to transfer this understanding to those he talks to.

Certifications Given

Stefan Roock certifies that Johannes Link is, at a minimum, qualified to teach others the skill Test Driven Development, based on this evidence:

Johannes did several successful TDD workshops/tutorials at popular conferences like JAX.

Additionally Johannes has written a successful book about unit testing and TDD.


Stefan Roock certifies that Bernd Schiffer is, at a minimum, qualified to teach others the skill TDD and DRY, based on this evidence:

I have seen him teaching collegues within projects as well as clients in commercial trainings the ideas and principles of TDD (Test Driven Development) and DRY (Don't Repeat Yourself).
He is one of the few people who understands that TDD is a lot more than writing the test before the production code.


Stefan Roock certifies that Jens Coldewey is, at a minimum, qualified to teach others the skill Agile Software Development, based on this evidence:

I have heard several convincing talks given by him addressing the aspects of programming as well as the aspects of project management.


Stefan Roock certifies that Henning Wolf is, at a minimum, qualified to teach others the skill Agile Software Development like XP, Scrum and Feature Driven Development, based on this evidence:

I have seen him given lots of successfull trainings, tutorials and talks about agile software development including XP (eXtreme Programming), Scrum and FDD (Feature Driven Development).


Stefan Roock certifies that Henning Wolf is, at a minimum, qualified to use the skill Agile Project Management, based on this evidence:

I have worked with him in agile software development projects where he was the Project Leader. The projects ranged from small scale (2-3 people for 3 months) to larger scales like 6 years with up to 30 developers.


Stefan Roock certifies that Christoph Kemp is, at a minimum, qualified to help others in the use of the skill test driven development (TDD), based on this evidence:

I have worked together with Christoph on projects where TDD was intensivly used. He helped other project members to use TDD.