David Villa had served as the cio of the $145 billion plan since 2006.
The cio of a mid-Atlantic institute will retire from the organization.
Cammack expects to grow its investment research team following the transaction, the firm said.
The plan disclosed three commitments previously approved in closed session this week.
He will be responsible for raising capital in North America for all of Starwood’s private investment funds and co-investments.
The city is seeking an advisor for the program as it will issue another RFP to consolidate the record keeping, plan administration and investment services.
The hire completes a search launched last year due to the incumbent’s contract expiration.
The planned search is due to state regulation.
His appointment to the board of directors will be recommended to shareholders on April 20.
The cio of a college in New England is departing later this year.