His last day at the firm will coincide with his four-year anniversary in the position.
The county first hired its incumbent in 2006.
The plan is considering adding core and core-plus fixed-income managers to its portfolio.
The state is seeking a firm to help create a special purpose vehicle for in-state investments.
He will be responsible for institutional distribution strategies, business development, marketing and client service for the firm.
The new global head of fixed-income will join the firm in August.
The selected firm will also be expected to provide investment services related to record keeping and administration.
Jean Hsu will retire in July after 25 years at the plan.
The plan also eliminated its 20% covered calls and 2.5% REITs targets.
The commitments include a new manager relationship and a follow-on.