Press Release

HOUSTON– March 22, 2023 – KBR (NYSE: KBR) announced today the launch of SCOREKlean℠, a proprietary ethylene and propylene process technology utilizing 100% hydrogen-fueled burners for zero emissions from the ethylene cracking furnaces.

By achieving zero emissions from ethylene cracking furnaces, SCOREKlean will play a major role to decarbonize the petrochemical industry, given that furnaces are the largest sources of greenhouse gas emissions in the industry. Additionally, SCOREKlean delivers the inherent advantages of KBR’s SCORE technology including ultra-low CAPEX design, feedstock flexibility, and higher yields.

“We are excited to launch SCOREKlean, especially at a time when the petrochemical industry is going through a growth phase and also prioritizing decarbonization,” said Doug Kelly, KBR President, Technology. “By offering a zero emission furnace solution, SCOREKlean enables our clients to balance their sustainability and growth objectives.”

KBR is a leader in process technology development, commercialization, and plant design bringing innovative solutions to the market for over 50 years.

About KBR

We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 30,000 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

Forward Looking Statements

The statements in this press release that are not historical statements, including statements regarding the implementation of SCOREKlean, are forward-looking statements within the meaning of the federal securities laws. These statements are subject to numerous risks, uncertainties and assumptions, 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, uncertainties and assumptions include, but are not limited to, those set forth in 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, which discuss some of the important risks, uncertainties and assumptions that the company has identified that may affect its business, results of operations and financial condition. Due to such risks, uncertainties and assumptions, you are cautioned not to place undue reliance on such forward-looking statements, which speak only as of the date hereof. 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

Jamie DuBray

Vice President, Investor Relations

713-753-5082

[email protected]

Media

Philip Ivy

Vice President, Global Communications and Marketing

713-753-3800

[email protected]