FORT WAYNE, Ind., May 3, 2013 /PRNewswire/ -- Steel Dynamics, Inc. (NASDAQ/GS: STLD) today announced two senior level management appointments. Robert (Rob) A. Simon has been appointed to the position of Vice President and General Manager of the company's Structural and Rail Division. The position became vacant following John Nolan's assumption of the newly created position as Vice President – Product Development. Most recently, Rob was Executive Vice President of Evraz Tubular Product Group. For ten years prior, he was Vice President and General Manager of Rocky Mountain Steel Mills where he was responsible for the Rail Mill, Rod & Bar Mill, and the Seamless Mill. Simon has served as Chairman of the Steel Manufacturers' Association. He will report directly to Steel Dynamics' Executive Vice President for Steelmaking, Dick Teets. In making the appointment, Mark Millett, President and Chief Executive Officer of Steel Dynamics, noted, "Rob has accomplished much in his career. From his tenure at Oregon Steel Mills, Inc., in the early 90s where he gained 'hands on' experience in the mini-mill world, throughout his stellar and multi-faceted 25 year career, Rob has been an advocate of the precept that 'people make the difference.' That is precisely our SDI philosophy and why I feel that in addition to his many talents, our culture will embrace him. He is a proponent of a 'customer centered' business model. His focus on safety and innovation will complement our ongoing strategic efforts." Chris Graham, General Manager of New Millennium Building Systems (NMBS), has been promoted to the position of Vice President of Steel Dynamics, and President of New Millennium Building Systems. In this capacity, he will have complete responsibility for NMBS' six plants located throughout the United States and Mexico. A 20 year veteran of SDI, he has had management roles at the company's Flat Rolled Division and Structural and Rail Division. In 2007, he joined NMBS as the General Manager of the Butler Division. Over the next three years he held the positions of General Manager in Florida, South Carolina, and Virginia. Upon the recent acquisition of additional joist assets, he led the retooling, staffing and start-up of plants in Mexico, Nevada, and Arkansas. He currently serves as President of the Steel Joist Institute. He will report directly to Mark Millett, President and Chief Executive Officer of Steel Dynamics, following the departure of Gary Heasley, Steel Dynamics' Executive Vice President and President of New Millennium Building Systems, who has left the company to pursue other opportunities. Millett noted, "Chris embodies the SDI culture. From the time thirty years ago as a rigger and welder through today, he demonstrated an insatiable desire to learn and do more. His career path is 'THE' story of who we are. Bright, entrepreneurial and highly motivated, Chris understands our building systems platform. He is a team player who has gained the respect of those with whom he works."