Most recently, Rosenzweig was a vice-president at Sempra Energy Trading in Stamford, Connecticut, a division of California-based Sempra Energy. He has also been a partner, broker and marketer at Chicago-based investment house Sakura Dellsher, and its predecessor, Gerald Energy. Rosenzweig has developed and managed several gas and power desks.

Evolution will provide brokerage and structured-transaction services to producers, end-users and marketers in physical and financial gas markets for all