Mr. Stephen Modzelewski serves as a Director of Signum Biosciences, Inc. Mr. Modzelewski serves as Director of Reason Foundation and Institute fro Justice. Mr. Modzelewski worked with Salomon Brothers in the field of finance which is now a part of Citicorp. In his 5 year tenure there, he created various mathematical models for valuing fixed income securities, developed the conceptual framework for "option adjusted spread," which has become a standard analytical metric for complex fixed income securities, and codified the rules for "Liar's Poker." In 1988, he left Salomon and established the hedge fund Parsec Trading Corp., which has been a successful fixed income arbitrage fund for over 13 years. At the end of 2002, Mr. Modzelewski established his own trading and investment firm, Maple Engine L.L.C., a private multi-strategy investment and trading fund focusing on speculative trading and venture investment.