CH2M picked up LGE's significant private sector design portfolio.

The sale was forced by the financial collapse of JA Jones inc, its North American parent company and wholly owned subsidiary of the insolvent German construction conglomerate, Philipp Holzmann AG.

In December 2003, Lockwood Greene Engineers was acquired.

In August 2002, the company acquired Gee & Jensen, a Ports and Harbor firm based in Florida, DeMil International, a weapons destruction firm based in the United States, and EHS Consultants Ltd, a consulting firm based in Hong Kong. In 1977, the company acquired Black, Crow & Eidsness, an engineering firm in the southeast United States. In March 2013, the company was selected by South Oil Company of Iraq to provide project management consultancy services for the Iraq Common Seawater Supply Project. In April 2019, the company was cited for safety violations at the project. In June 2008, the United States Department of Energy selected a subsidiary of the company to manage the deconstruction and remediation of the Central Plateau on the Hanford Site in eastern Washington, one of the world's largest environmental cleanup projects, including shrinking the environmental footprint of the Hanford Site from 586-square-mile (1,520 km 2) to 75 square miles (190 km 2). On August 30, 2006, along with partners Mace Group and Laing O'Rourke, the company was selected as a supplier for the London 2012 Olympics. In April 2009, a consortium led by the company was named program partner to oversee construction of the Crossrail project to expand London's transit system. In August 2007, the Panama Canal Authority selected the company to manage the $5.25 billion Panama Canal expansion project, adding new locks to the Pacific and Atlantic ends of the canal and allowing Panamax ships to pass through the canal for the first time. In April 2007, the company was selected for an $11.7 billion project to relocate American military bases in Korea. In June 2007, along with General Electric, the company was selected to build a $660 million gas-fired power plant in Queensland, Australia. In 2006, the company assisted in reconstruction efforts along the Gulf Coast of the United States after Hurricane Katrina. In October 2005, Kaiser Hill, one joint venture of CH2M Hill, decommissioned and closed a former nuclear weapons facility at the Rocky Flats Plant. 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. In 2000, the company was part of a joint venture to replace the Singapore sanitary services infrastructure. The firm remained headquartered in Oregon until 1980, when it relocated to Colorado. The company became CH2M Hill after a merger with Clair A. Cornell, Howland, and Hayes were all graduates of Oregon State University.

1.4 Acquisition by Jacobs Engineering GroupĬH2M 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.

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