UNIONTOWN — A Canadian gas well services firm plans to hire more than 200 people for a new complex being built in Fayette County to serve Marcellus Shale wells in Western Pennsylvania.

Calfrac Well Services, based in Calgary, Alberta, provides hydraulic fracturing, or fracking, as well as coiled tubing and cementing services for oil and gas well drillers.

John Grisdale, president of the company’s U.S. operations says Calfrac is building a full-service facility that should open late next year.

Calfrac also has operations in western Canada, Russia, Mexico and Argentina.