St. Luke's Episcopal Health System announces John Scott Arnoldy has been appointed chair of the St. Luke's Episcopal Hospital Board of Directors. Arnoldy is chairman/president/CEO of Triten Corporation, a $350 million privately-held worldwide engineering and manufacturing firm based in Houston. Arnoldy succeeds Lorne Bain, founding chair of the SLEH Board, who served on the system board from 1994 until term-limits required his retirement.