Core-Mark Holding Company, Inc. announced that it has appointed Rocky Dewbre to its Board of Directors. Dewbre is the Chief Executive Officer of Empire Petroleum Partners, LLC in Dallas Texas, and served as a Board member for CST Brands, Inc. from 2016 until 2017 when it was acquired by Couche-Tard. Prior to joining CST Brands’ Board, Mr. Dewbre served as Executive Vice President at SUNOCO LP from 2014 to 2015.