DEFINED BENEFIT

Arizona State Retirement System taps new CIO

Karl Polen was named chief investment officer of the $32 billion Arizona State Retirement System, Phoenix, said David Cannella, spokesman, in an e-mail.

Mr. Polen, previously the head of private markets investing in the pension fund’s investment division, starts in the new role on Tuesday. He replaces Gary R. Dokes, whose last day was Monday.

Mr. Dokes is taking on the CIO position at the $760 million Arizona Community Foundation, Phoenix, in late March.

The pension fund’s investment team will take on Mr. Polen’s previous duties and there is no replacement at this time, Mr. Cannella said.