A & L Technical Services, 16800 Haven Ave, Orland Hills, IL 60487, US

Established in 1926, Shambaugh & Son provides engineering and construction solutions. The company specializes in providing new and retrofit construction for the industrial, commercial, institutional, food processing, medical, commercial and biofuel projects. It provides electrical, mechanical, fire protection and prefabrication services. Shambaugh & Son also offers process control and water and waste treatment services. It is one of the largest ammonia refrigeration contractors in the United States. The company also designs hygienic process systems for the dairy, pharmaceutical, beverage, meat and snack food industries. It additionally provides hardware integration and software development services, as well as computer modeling of processes and facilities. The company is a part of EMCOR Group, which is a Fortune 500 company with more than $5.9 billion in annual revenues. Headquartered in Fort Wayne, Ind., Shambaugh & Son maintains a location in Downers Grove, Ill.