Mr. Joseph Anthony DiMenna serves as Managing Director since 1983, President and Head Portfolio Manager at Zweig-DiMenna Associates Inc. Mr. DiMenna Co-Founded the firm. He serves as an Executive Vice President and Treasurer of Zweig Associates, Inc. He co-founded Zweig-DiMenna International Managers Inc., in 1986 and serves as its Executive Vice President. Mr. DiMenna has been a Vice President and Director of Research at Zweig Securities Advisory Service Inc... (login for more professional bio)