KBR, Inc. (formerly Kellogg Brown & Root) is a U.S. based company operating in fields of science, technology and engineering.[2] KBR works in various markets including aerospace, defense, industrial and intelligence.[3] After Halliburton acquired Dresser Industries in 1998, Dresser's engineering subsidiary, the M. W. Kellogg Co., was merged with Halliburton's construction subsidiary, Brown & Root, to form Kellogg Brown & Root.