PITTSBURGH, June 10, 2013 /PRNewswire/ -- United States Steel Corporation President and Chief Operating Officer Mario Longhi today announced a series of executive management appointments. The appointments are effective July 1 and involve individuals who will report directly to Longhi, unless otherwise noted. As announced earlier today, Michael S. Williams, who currently serves as senior vice president – North American flat-rolled operations, has been named senior vice president – strategic planning and business development, assuming these responsibilities from David H. Lohr, who plans to retire later this year. Reporting directly to Williams will be Michael J. Hatcher, who has been named vice president – business development and real estate. Hatcher currently serves as vice president – raw materials, procurement and real estate. Douglas R. Matthews will succeed Williams in the role of senior vice president – North American flat-rolled operations, and David L. Britten, who currently serves as vice president – tubular technology and business development, will assume the role of senior vice president – Tubular operations, succeeding Matthews. George F. Babcoke will return to the Slovak Republic to serve as senior vice president – European operations and global safety, and president of U. S. Steel Kosice. David J. Rintoul, who is currently vice president – European operations and president of U. S. Steel Kosice, will relocate to the United States to fill the newly created position of vice president – innovation and continuous improvement. Anthony R. Bridge will retain his current role as vice president – engineering and research and development. In addition, the company announced the appointment of Christine S. Breves to the role of vice president and chief procurement officer, reporting to Larry T. Brockway, senior vice president and chief risk officer. She joins U. S. Steel following her retirement from Alcoa Inc. in January 2013. Breves has more than 30 years experience in leading procurement and global sourcing strategies for large industrial firms in the mining and metals sector. An additional news release later today will provide more details about this appointment and Breves' background. Commenting on the changes, Longhi said, "I am pleased to announce these important executive management appointments, all of which further leverage the deep expertise and leadership capability of each of these seasoned executives. These changes will accelerate our business performance improvement plans while maintaining a strong focus on our customers and a commitment to our core values."