Martijn MeijeringCertify Martijn Meijering

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Certifications Received

Rogier van Sterkenburg certifies that Martijn Meijering is, at a minimum, qualified to teach others the skill Extreme Programming, based on this evidence:

Martijn is an early adopter of Extreme Programming. He has given presentations and practical courses on XP. He also participated actively in usenet discussions, helping others to better understand the principles of XP. Martijn is an excellent software engineer.

Martijn and I have worked together on many projects over the years. For two and a half years we ran a small software company that was based on our enthusiasm for XP. During that time we did a lot of pair programming and we taught a six week practical course in XP for the university of Leiden in the Netherlands.

Certifications Given

Martijn Meijering certifies that Ron Jeffries is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

Ron Jeffries was a member of the first XP team. Since the early days of XP Ron Jeffries has written countless messages on Ward's Wiki, usenet newsgroups, mailing lists et cetera. I first learned XP through his postings on the Web and those of Kent Beck. Ron also co-wrote the excellent book Extreme Programming Installed. If Ron Jeffries is not an XP Master, I don't know who is.

Martijn Meijering certifies that Ward Cunningham is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

Ward Cunningham is considered one of the giants in the agile field. He is one of the founding fathers of the patterns movement in software, creator of the c2.com wiki and the concept of wiki's itself, the author of the Episodes pattern language (a precursor to XP), creator of the functional testing framework Fit as well as lot of other great ideas beyond agile software development.

I have never met him in person, so this is a data point with little weight. I know I'm not alone in thinking he is one of the great men of XP, and it seems to me that large numbers of lightweight data points should add up to a lot of evidence.

Martijn Meijering certifies that Steve Freeman is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

His work on Mock Objects shows Steve is capable of innovation. I've seen him give presentations at agile conferences and have had the pleasure to talk with him a couple of times.

I don't know Steve well, so this is a low-weight data point.

Martijn Meijering certifies that Eric Lefevre is, at a minimum, qualified to use the skill Extreme Programming, based on this evidence:

Based on conversations we had at various agile conferences, I believe Eric is a Master Extreme Programmer.

Since I don't know Eric well, this is a low-weight data point.

Martijn Meijering certifies that Joshua Kerievsky is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

Joshua Kerievsky is the founder of Industrial XP. He wrote a very good book called Refactoring to Patterns.

Apart from that, I only know him from reputation, so this is a low-weight data point.

Martijn Meijering certifies that Ivan Moore is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

I had the pleasure to attend presentations by Ivan at a number of conferences and also spoke with a couple of times. Ivan is the creator of the build-o-matic continuous integration server and Jester, the mutation testing tool for Java.

I don't know Ivan well, so this is a low-weight data point.

Martijn Meijering certifies that Emmanuel Gaillot is, at a minimum, qualified to teach others the skill Extreme Programming, based on this evidence:

Based on conversations at conferences and at the 2007 European Consultant's Camp, I believe Emmanuel to be a Master Extreme Programmer.

I don't know Emmanuel very well, so this is a low-ish weight data point.

Martijn Meijering certifies that Nat Pryce is, at a minimum, qualified as a master, capable of innovating in the skill Extreme Programming, based on this evidence:

His work on Mock Objects shows Nat is capable of innovation. I've seen him give presentations at agile conferences and have had the pleasure to talk with him a couple of times.

I don't know Nat well, so this is a low-weight data point.

Martijn Meijering certifies that Rogier van Sterkenburg is, at a minimum, qualified to teach others the skill Extreme Programming, based on this evidence:

Rogier and I have worked together on many projects over the years. For two and a half years we ran a small software company that was based on our enthusiasm for XP. During that time we did a lot of pair programming and we taught a six week practical course in XP for the university of Leiden in the Netherlands. Rogier is an excellent programmer with a deep understanding of software development.