Proman AG is a Swiss-German engineering, procurement and construction group operating worldwide in the gas processing, petrochemical, steel, infrastructure and automotive sectors. The group carries out engineering, feasibility studies, construction and project execution, as well as offering procurement, marketing and management services. Established in 1984, Proman manages large EPC projects, and co-markets and distributes petrochemicals. The group has partnered with its Mexican subsidiary Gas y Petroquímica de Occidente, S.A. de C.V. (GPO) to invest in the construction of a fertilizer plant in Topolobampo in the northwestern state of Sinaloa, Mexico. The group has 31 operating subsidiaries on four continents.