Dorvin D. Leis, founded in 1961 and located in Honolulu, is one the largest mechanical contractors in the state of Hawaii. The company s services include plumbing, air conditioning, fire sprinklers, electrical, sewer-sewage disposal, and above and below ground flammable liquid storage tanks. It is a full-service mechanical contractor and maintains its own in-house design, control and service departments. The company s management staff has more than 400 years of combined experience in mechanical contracting, from specialized commercial and medical projects to high-rise resorts to large multi-family housing projects. The staff is comprised of full-time detailers, fire sprinkler designers, estimators, expediters, project managers and professional engineers.