• Salt Lake City, UT, USA

Matrix Service Company makes sure that oil and water don't mix. The company provides construction, repair, and maintenance services mainly to the petroleum and power industries. Its construction services segment specializes in aboveground storage tanks to hold oil, gas, and specialty materials. The company also designs and builds plants, refineries, and other installations. Its repair and maintenance unit offers preventive, routine, and emergency services. Matrix focuses on turnarounds, outages, and shutdowns, when time is of the essence. The company, which has around a dozen regional facilities in the US and Canada, has completed projects in almost every state and province.