Hixon joined NS in 1985 as a tax attorney and first was elected an officer of the company in 1993 when he was named vice president taxation. He subsequently was promoted to a series of more senior executive positions with wide ranging responsibilities, including Senior Vice President administration, and Executive Vice President Finance and Public Affairs, before being named to his current position in 2005.

Hixon's legal and corporate communications responsibilities will be assumed by William A. Galanko, whom the board of directors of Norfolk Southern Corp. named senior vice president law and corporate communications.

Also effective 1 December 2016, the board of directors named John M. Scheib vice president law, to replace Galanko. Since joining NS in 2005, Scheib has held positions of increasing responsibility in the NS law department and currently is general counsel commerce. Previously, Scheib served as Chief of Staff and counsel to the chairman of the US Surface Transportation Board and as counsel to the railroad subcommittee in the US House of Representatives. Scheib holds an undergraduate degree from the University of Virginia and a law degree from Villanova University. In 2015, he completed the General Management Program at Harvard Business School.