Press Release

HOUSTON Ð April 17, 2018 Ð KBR, Inc. (NYSE: KBR) announced today the successful completion of the ethylene plant revamp project for Korea Petrochemical Ind. Co., Ltd (KPIC) in Ulsan, Korea.

Under the terms of the contract, KBR provided its proprietary Selective Cracking Optimum Recovery (SCORETM) technology license, basic engineering design and proprietary equipment supply services to expand KPIC's existing plant ethylene capacity from 486 KTA to 800 KTA.Ê The revamp included the addition of two new highly selective SC-1 proprietary furnaces and targeted product recovery system modifications to provide superior yield, energy and operational performance.

"KBR is honored that KPIC selected KBR's SCORETM Ethylene Technology for this strategic revamp project," said John Derbyshire KBR President, Technology. "The close cooperation between our teams resulting in the successful completion of this project is testament to KPIC's One Project Ð One Team spirit."

KBR has been a leader in olefin plant design, construction and technology development for more than 50 years. Since 1990, over 20 new ethylene plants with a combined capacity of 13 million metric tons per year have been brought on-stream using KBR's cost-effective, cracking technologies and flexible plant designs to produce ethylene, propylene and other byproducts from a variety of feedstocks. SCORETM technology is an innovative and differentiated technology backed by extensive ethylene operating experience that improves operability and reliability while reducing production costs.About KBR, Inc.

KBR is a global provider of differentiated professional services and technologies across the asset and program life cycle within the Government Services and Hydrocarbons sectors. KBR employs approximately 34,000 people worldwide (including our joint ventures), with customers in more than 75 countries, and operations in 40 countries, across three synergistic global businesses:Government Services, serving government customers globally, including capabilities that cover the full life-cycle of defense, space, aviation and other government programs and missions from research and development, through systems engineering, test and evaluation, program management, to operations, maintenance, and field logisticsTechnology & Consulting, including proprietary technology focused on the monetization of hydrocarbons (especially natural gas and natural gas liquids) in ethylene and petrochemicals; ammonia, nitric acid and fertilizers; oil refining; gasification; oil and gas consulting; integrity management; naval architecture and proprietary hulls; and downstream consultingEngineering & Construction, including onshore oil and gas; LNG (liquefaction and regasification)/GTL; oil refining; petrochemicals; chemicals; fertilizers; differentiated EPC; maintenance services (Brown & Root Industrial Services); offshore oil and gas (shallow-water, deep-water, subsea); floating solutions (FPU, FPSO, FLNG & FSRU) and program management

KBR is proud to work with its customers across the globe to provide technology, value-added services, integrated EPC delivery and long term operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver.

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Forward Looking Statement

The statements in this press release that are not historical statements, including statements regarding future financial performance, are forward-looking statements within the meaning of the federal securities laws. These statements are subject to numerous risks and uncertainties, many of which are beyond the company's control that could cause actual results to differ materially from the results expressed or implied by the statements. These risks and uncertainties include, but are not limited to: the outcome of and the publicity surrounding audits and investigations by domestic and foreign government agencies and legislative bodies; potential adverse proceedings by such agencies and potential adverse results and consequences from such proceedings; the scope and enforceability of the company's indemnities from its former parent; changes in capital spending by the company's customers; the company's ability to obtain contracts from existing and new customers and perform under those contracts; structural changes in the industries in which the company operates; escalating costs associated with and the performance of fixed-fee projects and the company's ability to control its cost under its contracts; claims negotiations and contract disputes with the company's customers; changes in the demand for or price of oil and/or natural gas; protection of intellectual property rights; compliance with environmental laws; changes in government regulations and regulatory requirements; compliance with laws related to income taxes; unsettled political conditions, war and the effects of terrorism; foreign operations and foreign exchange rates and controls; the development and installation of financial systems; increased competition for employees; the ability to successfully complete and integrate acquisitions; and operations of joint ventures, including joint ventures that are not controlled by the company.

KBR's most recently filed Annual Report on Form 10-K, any subsequent Form 10-Qs and 8-Ks, and other Securities and Exchange Commission filings discuss some of the important risk factors that KBR has identified that may affect the business, results of operations and financial condition. Except as required by law, KBR undertakes no obligation to revise or update publicly any forward-looking statements for any reason.For further information, please contact:

Investors
Nelson Rowe
Senior Vice President, Investor Relations
713-753-5082
Investors@kbr.com

Media
Brenna Hapes
External Global Communications
713-753-3800
Mediarelations@kbr.com