Press Release

HOUSTON – (July 14, 2022) – KBR (NYSE: KBR) announced today that it will lead research and development for self-defending, self-recovering cyber defense concepts in support of the UK Ministry of Defence (MOD), through Frazer-Nash Consultancy, a KBR company.

Frazer-Nash will work with the MOD’s Defence Science and Technology Laboratory (Dstl) as part of the Autonomous Resilient Cyber Defence (ARCD) project.

The three-year project will leverage artificial intelligence (AI) and machine learning to develop cyber defense concepts that can be tested and evaluated against attacks in a simulated military environment. Frazer-Nash will use the latest technologies to deliver high-risk, disruptive options; AI-driven cyber defense decision-making; and informed cyber sensing, which will be integrated into the concept demonstrator.

“KBR and Frazer-Nash are renowned for helping organizations safeguard their systems and protect their critical assets and processes through teams that are at the forefront of innovation,” said Andrew Barrie, Managing Director of Frazer-Nash Consultancy and President of KBR’s Government Solutions EMEA business. “We are excited to support the MOD in its fight against cyber-attacks with this cutting-edge research and demonstrator.”

Zoe Fowle, Dstl’s Cyber Security Programme Manager, said, “Dstl are excited to be working with KBR and Frazer-Nash on this vanguard project, delivering cutting-edge response and recovery concept demonstrators over the next three years, with the potential to transform cyber resilience for MOD.”

KBR has worked in the cyber security arena for more than two decades. Its security professionals protect organizations’ systems and data, analyze and mitigate cyber risk, and deliver advice and assurance, as well as using their expertise to advance holistic cyber defense that covers technology, people and processes.

About KBR

We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 28,000 people performing diverse, complex and mission critical roles in 34 countries.

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

Visit www.kbr.com

About Frazer-Nash Consultancy Ltd

Frazer-Nash is a leading systems and engineering technology company. Our work makes a difference to things that matter in the world.

With over 1,000 employees, Frazer-Nash works from a network of nine UK and four Australian locations. Our consultants apply their expertise to develop, enhance and protect our clients' critical assets, systems and processes.

In an uncertain world, we contribute to national security in a huge number of ways. We help make sure that power is generated and distributed to everyone who needs it. We support moving people and goods around and between the big cities of an increasingly urbanised society. We work to make the world a more sustainable place. We ensure governments save time and money when public spending globally is under huge pressure. And we help our clients wrestle with the challenges and opportunities of an ever-accelerating digital revolution.

Our people use their combined strengths to deliver technical solutions to some of the most challenging problems out there. Sometimes these challenges are difficult technical issues, and sometimes they are difficult because of the environment our clients operate in. Our great strength is our ability to rise to these challenges and deliver.

www.fnc.co.uk

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 significant adverse impacts on economic and market conditions of the COVID-19 pandemic and the company’s ability to respond to the resulting challenges and business disruption; the recent dislocation of the global energy market; the company’s ability to manage its liquidity; 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; 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; the possibility of cyber and malware attacks; 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.

The company’s most recently filed Annual Report on Form 10-K, any subsequent Form 10-Qs and 8-Ks, and other U.S. Securities and Exchange Commission filings discuss some of the

important risk factors that the company has identified that may affect its business, results of operations and financial condition. Except as required by law, the company undertakes no obligation to revise or update publicly any forward-looking statements for any reason.

For further information, please contact:

Investors

Alison Vasquez

Vice President, Investor Relations

713-753-5082

Investors@kbr.com

Media

Philip Ivy Vice President, Global Communications and Marketing

713-753-3800

MediaRelations@kbr.com