Elizabeth Flisser Rosman was named head of investment management at Cowen Investment Management, spokesman Dan Gagnier said.
She replaced Thomas Strauss and Fred S. Fraenkel, both vice chairmen at Cowen, who took on the responsibilities of the role temporarily when Michael Singer left the company, which was then called Ramius, in January 2017 to pursue other opportunities. Messrs. Strauss and Fraenkel will resume their prior roles and responsibilities.
Ms. Rosman will be responsible for Cowen's investment management division and expanding its alternative investment business. She will report to Cowen parent company CEO Jeffrey M. Solomon.
Ms. Rosman was managing director and head of strategy at Cowen Investment Management. She will continue to have those responsibilities, Mr. Gagnier said.
Ramius, which merged with Cowen in 2009, was renamed Cowen Investment Management in May 2017. Cowen Investment Management has about $11 billion in assets under management.