Since retiring from federal service, McCown served as the Chairman and CEO of Nouveau a consulting and advisory firm and served on the Southlake, Texas Planning & Zoning Commission where he notably voted against a new natural gas pipeline within the city's limits. Served on several boards including as a member and vice chair (regulatory and legal subcommittee) of the federal government's Commercial Space Transportation Advisory Committee, a member of the Salmon P. Chase College of Law's Board of Visitors, Co-Chair of the American Bar Association's Transportation Committee of the Administrative and Regulatory Law Section, a Program Council Member for the Warsaw Security Forum, a member of Europe's Pipeline Technology Conference safety advisory committee, board member of Aii.org, and a Fellow of the American Bar Association Foundation, a global honorary society of attorneys, judges, law faculty, and legal scholars whose public and private careers have demonstrated outstanding dedication to the highest principles of the legal profession and to the welfare of their communities.