Mechanical engineering firm and specialty subcontractor Integrated Facility Services celebrated its 50th anniversary in 2016.

The company, which provides HVAC, plumbing, piping, building automation and energy conservation services to nationwide clients from its offices in St. Louis and Columbia, Missouri, was founded in 1966 by current CEO and Chairman Bill Rundquist and originally known as Air Masters. In 2016, Air Masters consolidated its four affiliated companies and was rebranded as Integrated Facility Services.

Today, IFS employs more than 250 workers in five divisions: HVAC and mechanical, plumbing, fire protection, building automation and controls, and national design build and mechanical construction. The company is led by Rundquist’s son, John, who joined the company as a University of Missouri graduate and assumed the role of president in 2012.

IFS recently expanded its pipe fabrication and welding shop into a nearby facility in Fenton, Missouri. The company also purchased a 10-acre site in Columbia, Missouri, for a branch office and warehouse facilities.