Andrew B. Derrow and Christopher T. Valerio joined Hirtle, Callaghan &...

Andrew B. Derrow and Christopher T. Valerio joined Hirtle, Callaghan & Co., an investment management firm in West Conshohocken, Pa. Mr. Derrow was hired as director in the institutional department; Mr. Valerio was hired as vice president and investment officer. Both are new positions. Mr. Derrow previously was vice president in the investment management unit at Goldman Sachs & Co., New York; he won't be replaced. Mr. Valerio worked with foundation, endowment and corporate defined benefit clients as well as consultant relationships at Gardner Lewis Asset Management LP, Chaddsford, Pa.; no information on a replacement was available.