Graab began his railroad career in 1975 as a management trainee in the mechanical department of Illinois Central Gulf Railroad. He joined Norfolk and Western Railway Co. (a Norfolk Southern predecessor) in 1978 as a training instructor and advanced through a number of positions in the mechanical department and was named assistant vice president mechanical in 2007. He holds a bachelor's degree in Engineering from Purdue University and a master's degree in Business from Lynchburg College.
Heilig, a graduate of Georgia Tech, joined Southern Railway Co. (also a Norfolk Southern predecessor) in 1971 and served in management information, intermodal, engineering, mechanical, and transportation positions before being named vice president mechanical in 2006.
"Tim Heilig's leadership of the mechanical department enabled Norfolk Southern to achieve remarkable technological progress and efficiencies in our rolling stock fleet," said Norfolk Southern CEO Wick Moorman.