Head Of Minn. Retirement Fund Heads For RetirementWanted: Prudent, investment-savvy individual to manage $65 billion in state assets. Decisions scrutinized by top Minnesota leaders. Results affect pension accounts for thousands of retired public workers. A nationwide hunt is on for a successor to Howard Bicker, who is leaving his post as State Board of Investment executive director this fall. Bicker has spent more than four decades in the overlooked but important wing of state government, the last 32 years at the helm.