The prime contractor for SBIRS is Lockheed Martin, with Northrop Grumman as the major subcontractor. Aerojet became the prime contractor, with Westinghouse as the principal subcontractor. Rafael is the prime contractor and IAI is the major subcontractor for the SPYDER program. The site work and management subcontractor was Hazard Construction Company. Gentex alleges its subcontractor had fabricated compliance certificates for the screws. The mechanical and plumbing subcontractor was Industrial Commercial Systems. According to Walmart, the workers were employees of Walmart's construction subcontractor. Thus the British company was allowed to continue as a privileged subcontractor. This bid is inclusive of a multitude of subcontractor bids for each specific trade. In service, these locomotives were nicknamed "Lawleys" after the Beira Railway construction subcontractor. Another subcontractor, Havelsan, is responsible for system analysis and software support. The Pittsburgh-Des Moines Steel Company served as the subcontractor for the shell of the arch. It's a private ferry named Erdemir working as a subcontractor of TCDD. They are looking for a subcontractor to whom they can entrust the assembly. ProArt thus began to operate as an exclusive subcontractor to the brand.