Llewellyn Falco is an independent agile coach. He discovered strong-style pair programming. He is the creator of the open source testing tool ApprovalTests( www.approvaltests.com ). He spends most of his time programming in Java and C# specializing in improving legacy code. He is the co-founder of TeachingKidsProgramming.org & co-author of Mob Programming Guidebook.
If you would like to get a sample of him, check out his Practical Refactoring talk ( https://youtu.be/aWiwDdx_rdo )