Welcome to CSM Engineering P.C., a multi-disciplined professional engineering firm serving Long Island and the greater New York City Metropolitan Area, specializing in civil engineering, water/wastewater, and transportation projects. Founded in 1999, the firm is centrally located in Nassau County and has a staff of electrical, mechanical, civil engineers, and certified construction inspectors. The company has earned a distinct reputation in the engineering industry and has delivered successful projects over the years, gaining the confidence of governmental agencies, local municipalities, and prime engineering consultant firms.