Kenneth L. Shaffer, chief investment officer of the $29.9 billion Los Angeles County Employees' Retirement Association, Pasadena, Calif., retired. He had served in that post since 1995. Lisa Mazzocco, deputy CIO, is interim CIO while a search for a permanent replacement is under way. The search is being handled internally. Applications are due April 29. Additional information is available on LACERA's website at www.lacera.com.