MORGANTOWN, W.Va. -- The chief executive officer of West Virginia United Health System has announced his plans to retire.J. Thomas Jones, a Glen Dale native, told the health system's board on Friday that he intends to retire at the end of the year.Jones is only the second person to hold the CEO post since West Virginia United Health System was founded in 1996. When he joined UHS in 2002, it included only Ruby Memorial Hospital in Morgantown and the original United Hospital Center in Clarksburg. Since then, the health system has expanded to include City Hospital, in Martinsburg; Jefferson Memorial Hospital, in Ranson; and the Camden Clark Medical Center, on two hospital campuses in Parkersburg, according to a news release.The hospital system also includes United Physicians Care and the Health Partners Network.During Jones' tenure, United Hospital Center planned and completed a new $300 million hospital in Bridgeport, and Ruby Memorial was substantially enlarged. West Virginia United Health System has been listed as West Virginia's second-largest private employer for several years.Jones holds an undergraduate degree in business administration from West Virginia University and a master's degree in hospital administration from the University of Minnesota.Dr. Christopher Colenda, WVU's chancellor for health sciences, said in a statement that it's "been a privilege for me to work with Tom. He mentored me in my transition to West Virginia University, and is [a] wonderful friend."