Leo served many companies in the specialty aftermarket—Hurst, Amco and others—but it was his dedicated service to SEMA and the industry that will be remembered. It was Leo who, as president of SEMA, spearheaded the unprecedented growth of the annual SEMA Show, including pushing to have it moved from Anaheim, California, to Las Vegas. Leo held a seat on the SEMA Board of Directors, and proposed the creation of the SEMA Memorial Scholarship Fund. He was named SEMA Person of the Year in 1994.