Special Technical Services L.L.C. (STS) is a leading Omani Company specialized in the areas of fabrication and construction services for Oil, Gas, Petroleum, Petrochemical sectors and other Heavy Industrial, Commercial and Residential sectors within the Sultanate of Oman and abroad. STS was established in 1980 and is a member of the OOSC (Oman Oilfields Supply Center LLC) group of companies. STS has its Head Office in Al Khuwair, Muscat and workshop facilities in Sohar and Nizwa towns of Sultanate of Oman. STS has successfully executed a variety of projects and services for Clients within the Gulf region. STS conducts its business in compliance with international standards and has been certified for ISO 9001:2008 “Quality Management Systems – Requirements”, ISO 14001:2004 "Environmental Management Systems -Requirement", and OHSAS 18001:2007 "Occupational Health & Safety Management Systems - Requirements". STS’s workshop facilities in Sohar and Nizwa have the following Quality Product certifications: • ASME “U” – Manufacturing of Div. 1 Vessels • ASME “U2” – Manufacturing of Div. 2 Vessels • ASME “S” – Manufacturing and Assembly of Power Boilers • ASME “PP” – Fabrication and Assembly of Pressure Piping • National Board “R” – Repair of Div. 1 & Div. 2 Vessels • National Board “NB” – For Registration of Vessels under National Board STS’s Clients include but not limited to Petroleum Development Oman LLC (PDO), British Petroleum (BP), Sohar Aluminium Company LLC, Oman Oil Refineries and Petroleum Industries (ORPIC), Oman Gas Company LLC, Exterran, Occidental Oman LLC, Occidental Mukhaizna LLC, Oman LNG LLC, Shell Petroleum, Bechtel Oman LLC, Medco LLC, Oman Oil Company Exploration & Production LLC (OOCEP), Petrofac, Tatweer Petroleum Bahrain, and other local and international contractors.