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|Industry||Engineering, procurement, construction, and operations|
Corvallis, Oregon (1946)|
(as Cornell, Howland, Hayes, and Merryfield)
|Headquarters||Meridian, Colorado, United States|
|Jacqueline Hinman, president and chief executive officer|
|Revenue||US$5.88 Billion (FY 2013)|
|US$192.4M (FY 2013)|
|US$118.3M (FY 2013)|
|Total assets||US$3.06 Billion (FY 2013)|
|Total equity||US$642.6M (FY 2013)|
Number of employees
|Parent||Jacobs Engineering Group|
CH2M HILL, also known as CH2M, was a global engineering company that provided consulting, design, construction, and operations services for corporations, and federal, state, and local governments. The firm's headquarters was in Meridian, an unincorporated area of Douglas County, Colorado, in the Denver-Aurora Metropolitan Area.
The postal designation of nearby Englewood was commonly listed as the company's location in corporate filings and local news accounts. As of December 2013, CH2M had approximately 26,000 employees and 2013 revenues totaled $5.88 billion.
The firm was employee owned, with an internal stock market that operated buy/sell events quarterly. CH2M HILL announced a global rebrand on 13 April 2015, adopting the nickname CH2M while retaining CH2M HILL Companies Ltd. as the firm's legal name.
In December 2017, it was announced that CH2M had been acquired by Jacobs Engineering Group, a Dallas Engineering firm, reportedly for $3.3 Billion. 
CH2M was founded in 1946 in Corvallis, Oregon, by Oregon State University civil engineering professor Fred Merryfield and three of his students: Holly Cornell, James Howland and Thomas Burke Hayes (the firm was named after the founders, with Howland and Hayes making up the H2 portion). Cornell, Howland, and Hayes were all graduates of Oregon State University.
The company became CH2M Hill, after a merger in 1971 with Clair A. Hill and Associates of Redding, California. The firm remained headquartered in Oregon until 1980, when a decision was made to relocate to Colorado, a more central location in the United States.
On August 2, 2017, CH2M agreed to be purchased by Jacobs Engineering Group Inc. in a US$2.85 billion cash and stock deal. Shareholders approved the deal in December 2017, and the completion of the acquisition was announced on 18 December.
The company operates in multiple business units, among the operating divisions, 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 company developed, maintains and publishes its own method for managing projects for clients, called the CH2M Hill Project Delivery System, which may be found at popular internet book retailers. As a firm specializing in project management, CH2M Hill has been associated in several large, complex projects around the world. In 2005, a CH2M Hill joint venture known as Kaiser Hill decommissioned and closed a former nuclear weapons facility at the Rocky Flats site in Colorado (former Rocky Flats Plant).
In Singapore, the company was part of a joint venture to replace the country's sanitary services infrastructure. The new Singapore Deep Tunnel System was designed to improve reliability, ease, and economy of operation, and to help handle Singapore's increasing waterfront utilization. CH2M Hill assisted in reconstruction efforts along the US Gulf Coast in the wake of Hurricane Katrina.
Its main assignments included providing temporary housing, debris removal, and other services. Other large projects include a $660 million gas fired power plant in Australia, in conjunction with General Electric, and an $11.7 billion project to relocate American military bases in Korea.
In August 2007, the Panama Canal Authority selected CH2M Hill to manage the $5.25 billion Panama Canal expansion project, which will add new locks to the Pacific and Atlantic ends of the canal and allow Post Panamax ships passage through the canal for the first time. In 2009, a CH2M Hill consortium was named program partner to oversee construction of the Crossrail project to expand London's transit system.
On August 30, 2006, as part of joint venture CLM, CH2M Hill was a supplier for the London 2012 Olympics. The other two members of the venture are project management service provider Mace Group and Laing O'Rourke, the largest privately owned construction firm in the United Kingdom.
The company manages projects for the clients, taking into account the environmental footprint, aiming to use sustainable technology. The firm reduced its own internal environmental footprint in 2011.
In 2008, the U.S. Department of Energy (DOE) contracted a CH2M Hill company, CH2M Hill Plateau Remediation Company, LLC (CHPRC), to manage deconstruction and remediation of the Central Plateau on the Hanford Nuclear Site in eastern Washington, one of the world's largest environmental cleanup projects. The project focused on shrinking the environmental footprint of the Hanford Site from a 586-square-mile (1,520 km2) area (large enough to fit the city of Los Angeles) to 75 square miles (190 km2) or less.
More importantly, the project will reduce legacy infrastructure costs on site by more than $25 million per year starting in 2015. Using American Recovery and Reinvestment Act (ARRA) funding, CHPRC sped up cleanup of the site over two years, reducing the site footprint 25 percent, employing an additional 1,350 people in the process.
When ARRA funded work concludes in September 2012, the site footprint was targeted to shrink to a total of 290 square miles (750 km2), roughly half its previous size. Without ARRA funding, however, the scope of DOE contracted work at Hanford will be reduced. The company also announced that its workforce would reduce by up to 1,350 workers later that year through a combination of voluntary and involuntary separations.
Key acquisitions include Black, Crow & Eidsness (a southeast engineering firm in the United States) in 1977, Gore & Storrie (a Canadian water and wastewater engineering firm) in 1995, Gee & Jensen (a Ports and Harbor firm based in Florida) in August 2002, DeMil International (a weapons destruction firm based in the United States) in 2002, EHS Consultants Ltd (a consulting firm based in Hong Kong), Lockwood Greene, the oldest continuously operating professional services firm in the United States in December 2003, and BBS Corporation (an environmental engineering firm based in Ohio) in October 2005.
On September 7, 2007, CH2M HILL finalized the purchase of most of the components of VECO, an Alaska based firm specialising in services to the oil, gas, and energy sector that had become embroiled in the Alaska political corruption probe. In December 2007, CH2M Hill acquired Trigon EPC. In March 2008, CH2M Hill acquired Texas based Goldston Engineering, a company specialising in marine and coastal transportation engineering services.
In July 2011, CH2M Hill finalised the acquisition of Booz Allen Hamilton's State & Local Government Transportation Consulting (S&L Transportation) business. In September 2011, CH2M Hill announced that it intended to acquire the share capital of Halcrow Group Limited, a engineering consultancy based in the United Kingdom that operates worldwide. The acquisition for £124m was completed on November 10, 2011. In 2014, CH2M Hill acquired TERA Environmental Consultants of Calgary, Alberta.
Acquisition by Jacobs Engineering
In December 2017, Jacobs Engineering announced that it had acquired CH2M. The acquisition was supported by 96% of CH2M employee shareholders. 
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