CH2M Hill is an American engineering company that provides consulting, design, construction, and operations services for corporations, and local governments. CH2M acquired Halcrow in 2011 and operates in multiple business units. Amongst the many operating divisions are Water, Energy & Facilities; Government, Environment & Infrastructure; and International. Business groups served include: Water; Transportation; Operations and Maintenance; Government Facilities and Infrastructure; Nuclear; Environmental; Energy and Chemicals; Power; and Industrial and Advanced Technology.

The firm was named by Fortune magazine as one of the top 100 companies to work for in 2013, marking the company's sixth time on the list.