The retirement system retained its equity manager and let go of its incumbent fixed-income manager.
Director of Asset Allocation and Strategy Michele Mazzoleni departed the plan last month.
The retirement fund disclosed commitments totaling $4.5 billion in September.
The plan added commitments in the private equity, credit and real estate asset classes.
The pension plan was notified of two commitments totaling $257.5 million at its Nov. 13 board of investments meeting.
The pension plan has not had consultant coverage for private equity, private debt and private infrastructure.
The new hire will assume responsibilities from Head of Americas Investor Relations Adam Caskey, who is retiring next month.
The plan disclosed new private commitments made in recent months.
The senior investment officer has been with the plan since 2004.
The commission is searching for a discretionary manager for its non-pension assets.