United States Steel Corporation announced the appointment of Scott M. Dorn as Interim Head of Tubular Solutions. Dorn assumes responsibility for all aspects of the Tubular business from Douglas R. Matthews, Senior Vice President Tubular Solutions, who will retire in January. Dorn joined U. S. Steel in 1988 and advanced through increasingly responsible positions in engineering, plant operations, financial analysis and accounting, corporate finance, strategic planning, and business development. In 2005, he was appointed director-commercial for Tubular products and in 2007 advanced to general manager of Tubular marketing.