CH2M HILL Internal Stock Program

This letter is to update you about recent developments in CH2M HILL’s internal stock program. For the September 26, 2014, internal market trade, CH2M HILL allocated approximately $10.7 million of funds in addition to the aggregate funds available from stock buyers on the trade date to assist in clearing the market. As a result, the aggregate funds available for the September 26, 2014, internal market trade will enable each seller to sell – in total across directly-held shares and 401(k) plan or shares either in the Halcrow Shared Incentive Plan (SIP) or the U.S. Deferred Compensation Plan (DCP) – up to 489 shares of our stock, and sales orders will be administrated accordingly. Stockholders involved in the trade received a separate communication earlier this week informing them of these decisions.

The Board’s decision to prorate this market trade is a prudent measure in the context of the company’s current financial situation. The steps outlined here are taken thoughtfully and are in alignment with the intent of our unique employee-ownership program. Other important changes include:

Stock retention after leaving the company
Going forward, stockholders will be able to retain their direct shares of CH2M HILL stock after leaving the company, just as they always have in the 401(k) plan and the DCP. This change will make it easier for stockholders to manage their portfolios and tax obligations without the burden of automatically liquidating their shares, as has been the historical practice since our current Employee Ownership model was introduced in 2000.

Discontinuing CH2M HILL stock purchases through our U.S. 401(k) plan

The matching contribution provided to U.S. employees as part of the 401(k) retirement plan in the form of CH2M HILL stock will continue; but effective October 31, 2014, the 401(k) fund options will no longer include CH2M HILL stock as an option for investment. Balances currently in the fund will not be impacted.

Working to enhance long‐term value for stockholders, employees, and clients
As shared in our previous public filings, a global restructuring program is underway to achieve important business objectives and provide long‐term value for our stockholders, employees, and clients. Our corporate structure and overhead during the past several years have grown in anticipation of a future state that did not materialize. The restructuring aims to gain more than $US100 million in operational efficiencies by 2015. In addition, other activities already underway include a renewed emphasis on client service and sales; stronger focus on core markets, services, and geographies; a right‐sized office footprint; a more disciplined approach to risk mitigation and project delivery; and a refreshed strategy.

For more information, please refer to our public documents filed with the U.S. Securities and Exchange Commission and a September 10 news release on our external website. If you have questions about direct shares, please contact the Employee Ownership team. Questions related to the 401(k) should be directed to Fidelity Investments, 1‐800‐835‐5098. Questions about the Halcrow SIP should be directed to Capita Asset Services, UK: 0871 664 0300; International: + 44 (0) 208 639 3399.