Overseas AST is a construction company specializing in civil, marine, mechanical, and engineering fields. It engages in the building of ports and harbours, quay walls, jetties and sea defence structures, seawater intakes and outfalls, bridges, subsea pipelines, networks for industrial and housing developments, retro-fit networks, supply and installation of jet fuel hydrant networks, jet fuel storage facilities, jet refuelling facilities, marina pontoons, and floating structures. Overseas AST also offers various engineering solutions, including the construction of petrochemical storage facilities, import and export terminals, pumping stations and distribution manifolds, steel fabrication, and design services.