Peter Zielczynski has 25 years of experience in information technology. He holds a Ph.D. degree in computer science from the Technical University of Warsaw. He has published more than ten articles in technical journals and has made several presentations at international conferences, including the Rational Users Conference. Peter worked at Cyfronet developing expert systems, and then as a consultant for such clients as IBM, Merrill Lynch, Ernst & Young, and AIG. He was cofounder and CEO of a consulting company, International Object Technology, which was eventually acquired by a publicly traded company, The A Consulting Team (currently Helios & Matheson North America). Peter specializes in Requirements Management, Object-Oriented Analysis and Design, and Project Management and has been using Rational tools since 1994.