Fesco is a petroleum engineering services company that serves clients in the oil and gas industry. The company has been in operation for more than 60 years and employs a staff of over 650 people. It maintains nearly 15 locations in Texas, Oklahoma, Louisiana, Kansas and West Virginia. The company has fluids and analytical hydrocarbon laboratories. Fesco, formerly known as Findley Engineering Service Company, offers production testing and pipeline pigging services. The company also provides hydraulic choke and slickline services. It provides a variety of electric line trucks, as well as reservoir engineering solutions. Fesco offers large motor crane services and conducts pressure transient test.