Owned by descendants of founder John Ernest Dunn, J.E. Dunn Construction Group operates as the holding company for a group of construction firms that includes flagship J.E. Dunn Construction and Atlanta-based R.J. Griffin & Company. Founded in 1924, it builds institutional, commercial, and industrial structures nationwide. It also provides construction and program management and design/build services. J.E. Dunn Construction, which is among the largest US general builders, was one of the first contractors to offer the construction management delivery method. Some of its major projects have included an IRS facility and the world headquarters for H&R Block, both located in Kansas City, Missouri.