Roberto J. Martinez, vice president-controller for Wynn’s...

Roberto J. Martinez, vice president-controller for Wynn’s International, has assumed the additional position of treasurer, succeeding Chris Alford, who resigned. Martinez has been with the company for more than 25 years. Wynn’s, based in Fullerton, is a supplier of automotive air conditioners, O-rings, seals, molded rubber products, petrochemical specialty products and builders’ hardware supplies.