Shaw Capital Awarded Construction Management Contract for Clean Fuel Project at Marathon Illinois Refinery BATON ROUGE, La.,–The Shaw Group Inc. (NYSE: SHAW) today announced it has been awarded a capital contract from Marathon Oil Corporation (NYSE: MRO) to provide construction management services for a benzene reduction project at its refinery in Robinson, Ill. Services include management of site construction activities such as contractor selection, safety warning, materials management and project controls. The construction is expected to be completed before the mandated date for reduction of benzene content in gasoline to meet new EPA standards. The award follows Shaw’s earlier project management, engineering and procurement services work for the feasibility and definition phases of the project. “Shaw has extensive refinery expertise and a strong reputation for helping customers meet clean fuels regulations at their plants,” said Lou Pucher, president of Shaw’s Energy & Chemicals Group. “We place a priority on understanding key environmental and economic drivers and working closely with our customers to ensure success.” Most recently, Shaw management completed engineering and procurement services for another benzene reduction capital project at Marathon’s Catlettsburg, Ky., refinery and a 70,000 barrel per day heavy gas oil hydrocracker unit and 47,000 barrel per day kerosene hydrotreater unit at Marathon’s Garyville, La., refinery as part of that plant’s recent major expansion project. Last year, Shaw was awarded a maintenance, capital construction, turnaround support and specialty services contract for Marathon’s Texas Refining Division. The undisclosed value of the new contract will be included in Shaw’s Energy & Chemicals segment’s backlog of unfilled orders in the third quarter of fiscal year 2010. The Shaw Group Inc. (NYSE:SHAW) is a leading global provider of engineering, construction, technology, fabrication, remediation and support services for clients in the energy, chemicals, environmental, infrastructure and emergency response industries. A Fortune 500 company with fiscal year 2009 annual revenues of $7.3 billion, Shaw has approximately 28,000 employees around the world and is the power sector industry leader according to Engineering News-Record’s list of Top 500 Design Firms. For more information, please visit Shaw’s website at www.shawgrp.com. The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for certain forward-looking statements. The statements contained herein that are not historical facts (including without limitation statements to the effect that the Company or its management “believes,” “expects,” “anticipates,” “plans” or other similar expressions) and statements related to revenues, earnings, backlog or other financial information or results are forward-looking statements based on the Company’s current expectations and beliefs concerning future developments and their potential effects on the Company. There can be no assurance that future developments affecting the Company will be those anticipated by the Company. These forward-looking statements involve significant risks and uncertainties (some of which are beyond our control) and assumptions and are subject to change based upon various factors. Should one or more of such risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in the forward-looking statements. The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. A description of some of the risks and uncertainties that could cause actual results to differ materially from such forward-looking statements can be found in the Company’s reports and registration statements filed with the Securities and Exchange Commission, including its Form 10-K and Form 10-Q reports, and on the Company’s website under the heading “Forward-Looking Statements.” These documents are also available from the Securities and Exchange Commission or from the Investor Relations department of Shaw. For more information on the company and announcements it makes from time to time on a regional basis, visit our website at www.shawgrp.com.