KBR Inc

KBR, Inc. (formerly Kellogg Brown & Root) is a U.S. based company operating in fields of science, technology and engineering. KBR works in various markets including aerospace, defense, industrial, intelligence, and energy. The company supports various NASA programs, international partner space agencies, and commercial partners.

KBR was created in 1998 when M.W. Kellogg merged with Halliburton's construction subsidiary, Brown & Root, to form Kellogg Brown & Root. In 2006, the company separated from Halliburton and completed an initial public offering on the New York Stock Exchange. The company's corporate offices are in the KBR Tower in downtown Houston.

In September 2025, KBR announced plans to spin-off Mission Technology Solutions, its government services business, into an independent public company. The new company will operate under the name Trinzic with completion targeted for January 2027.