Robert Grainger is a 1954 graduate of the University of Houston. He is also past chairman of the president's fund council. Grainger was vice president of Underwood, Neuhaus, and Company, Inc. and the Houston Corporation.
While serving on the Board of Directors of the Houston First Financial Group he also served as Advisory Director for Lincoln Liberty Life Insurance of Nebraska. Grainger was treasurer on the Board of the Association for Community Television, a public foundation formed to support KUHT-TV.