The Dorvin D. Leis Company, Inc. (DDL) is the largest mechanical contractor in the State of Hawaii. We are a full service mechanical contractor encompassing the entire spectrum of new construction for residential homes, condominiums, resorts, light commercial projects, high-rise complexes, schools, and hospitals across the Hawaiian Islands. Our construction has also included state, county, and federal projects including military facilities. VISION: Be the first choice to build Hawaii. Remain the industry leader in our region. Be an organization that our co-workers, customers, and our community believes in. MISSION: “To be the premier mechanical contractor throughout the Pacific Region. Providing the highest quality product through sensible design, quality installation, project performance and continuing customer service.”