 Scaffolders, electricians, boilermakers and fitters were employed to maintain gas equipment up until 2017 by Esso contractor UGL in a joint venture with KAEFER Integrated Services, a German engineering and maintenance corporation.UGL won the contract outright in 2017 and offered the workforce their roles back on reduced pay and conditions under a new enterprise agreement through its subsidiary MTCT Services.The MTCT agreement was filed with the Australian Fair Work Commission in late 2016.