* William M. Leider has been named...

* William M. Leider has been named chief executive officer of Ventura-based Reddi Brake Supply Corp. He has been a company director since July, 1994, and a member of the executive committee since February. Bruce Douglass remains president and chief operating officer.

* Terri Thomas, assistant manager of McLain Escrow Inc. in Oxnard, has been certified as a mobile-home specialist by the California Escrow Assn.