Wojciech Kocjan is a programmer having ten years of experience with Tcl. His past experience includes both open source projects, involvement in commercial/government projects, as well as working for international corporations.

Over the years, Wojciech has contributed and created multiple open source projects related to Tcl. He is also the author of Learning Nagios 3.0, Packt Publishing and multiple publications on IT related subjects.

Piotr Beltowski is an IT and software engineer, and co-author of several US patents and publications. He has a master of Science in Telecommunications, and his technical experience includes various aspects of telecommunications, such as designing IP networks or implementing support of network protocols. Piotr's experience as Level 3 customer support lead makes him focused on finding simple solutions to complex technical issues.

His professional career includes working in international corporations such as IBM and Ericsson (as a contractor).