Heller Ehrman’s Washington, D.C., managing partner, Geoffrey Aronow, has joined Bingham McCutchen as a partner in its securities practice, along with three other new hires.

Aronow, a former enforcement director of the Commodity Futures Trading Commission, starts this week. He will handle complex securities matters for some of Bingham’s biggest clients, a list that includes Bank of America, Merrill Lynch and UBS, according to D.C. co-managing partner Neal Sullivan, who also co-chairs Bingham’s securities practice.