Denver, Jan. 7, 2008 — CH2M HILL OMI has appointed Elisa M. Speranza as the new president of the company.

Speranza replaces Mark Lasswell, who has been appointed President and Group Chief Executive for CH2M HILL’s Civil Infrastructure Client Group— the firm’s division focused on serving state and local government with a full range of engineering, construction and operations services. It includes three business groups: Transportation, Water and Operations & Maintenance (CH2M HILL OMI).

Speranza joins CH2M HILL OMI from the firm’s Water Business Group, where she spearheaded many successful teams and initiatives over the past seven years. Her recognized leadership in the North American water profession, coupled with her earlier roles in public utility management and in consulting, gives her a unique blend of experience that directly aligns with CH2M HILL OMI’s mission to deliver innovative utility, community and environmental solutions to clients in government and industry. She is active in a number of industry associations, including serving as vice president of global nonprofit Water For People.

CH2M HILL OMI provides a range of custom-tailored operations and maintenance solutions for clients in government and industry. Services include water and wastewater system optimization; contract O&M of water, wastewater and other utilities; and complete municipal operations, including administration, public works and community development. For details, visit www.omi.ch2mhill.com.

Employee-owned CH2M HILL is a $5 billion global firm providing engineering, construction, operations and related technical services to public and private clients. CH2M HILL has more than 23,000 employees worldwide and is routinely ranked among the Fortune Most Admired Companies in its industry. For details, visit www.ch2mhill.com.

###