DENVER, Colo., May 9, 2011 — Rhonda Harris, a 35-year veteran of the water industry and
past-president of the Water Environment Federation, has joined CH2M HILL as director of consulting services to develop and support the company’s operations and maintenance initiatives in Texas and elsewhere.

Over her career Harris has established herself as an international expert on water, wastewater and stormwater facilities and programs. In addition to experience in design, construction and operation of facilities, Harris’ technical expertise includes development and implementation of regulations for the U.S. Environmental Protection Agency.

“Rhonda is an acknowledged expert in utilities consulting and is widely known and well regarded throughout the industry in Texas, across the country and around the world,” says
Elisa M. Speranza, president of CH2M HILL’s Operations & Management Business Group. “We are fortunate to add someone of her caliber to our team to help us expand our consulting services in the Texas market.”

For the past 16 years, Harris has owned Profession Operations Inc., which provides contractual services for engineering firms, utilities and contractors. Her other experience includes work as manager of KPMG Peat Marwick’s utilities consulting practice in Dallas. She also has served as senior environmental engineer and storm water program manager for the EPA’s Dallas regional office and worked with various engineering firms and utilities in the Dallas area.

“It is the right time in my career to join CH2M HILL,” Harris says. “I’ve worked with and around them for years, so I know the players, and I have a lot of respect for the company overall. I think it’s a good fit, and I feel I can make significant contributions that will help grow the consulting business.”

Her extensive involvement with the Water Environment Federation, a non-profit, professional/educational organization of approximately 35,000 volunteers in 91 countries, includes serving as WEF president in 1998-99. She also serves as
co-chair for the Inter-American Water Resource Network and has been on their board for the past eight years. Other professional association affiliations include the American Water Works Association, the Water Environment Association of Texas – where she served as president in 1995-96 – and the International Water Academy.

Harris earned her bachelor’s degree in civil engineering from the University of Texas in Arlington and MBA from
Southern Methodist University. She is a registered Professional Engineer in Texas and also holds “A” water and
wastewater operators licenses in the state as well as trainer certifications.

Headquartered near Denver, Colo., USA, employee-owned CH2M HILL is a global leader in consulting, design,
design-build, operations, and program management for government, civil, industrial and energy clients. The firm’s work
is concentrated in the areas of water, transportation, environmental, energy, facilities and resources. With US$6.3 billion
in revenue and 23,000 employees, CH2M HILL is an industry-leading program management, construction management
and design firm, as ranked by Engineering News-Record and named a leader in sustainable engineering by Verdantix.
The firm has been named a FORTUNE 100 Best Companies to Work For five times. Visit us at www.ch2mhill.com,
twitter.com/ch2mhill and facebook.com/ch2mhill.