TRSA is the primary holding company for a group of companies capable of providing several different integrated services for turnkey projects worldwide. Since 1959, the TRSA group of companies has designed and built over 1000 industrial plants worldwide. International projects account for 70% of the company's annual turnover, mainly in Latin America and China. The firm has also moved increasingly into the Middle East, and in January 2009 was awarded a $1.2 billion contract to develop two onshore fields in the UAE for a subsidiary of ADNOC.