Located in Carnegie, Pa., Tri-State Design & Development is a multidiscipline consulting engineering firm established in 1983. It provides a range of engineering and construction management services for governmental agencies and private corporations. The company employs professional engineers, registered architects, construction inspectors and managers. Tri-State Design & Development provides architectural, civil, structural and electrical engineering services. The company also offers plumbing, fire protection and construction inspection services. It provides industrial, commercial and residential building design services. Tri-State Design & Development additionally offers site development, bridge inspection and analysis and field surveying services. Its client list includes Allegheny County Department of Public Works, Allegheny County Airport Authority, Port Authority of Allegheny County and Pennsylvania Air National Guard.