US: Vulcan Materials Company has announced four personnel changes as part its process to develop its new leadership team for the future. Danny R Shepherd, aged 61, has been appointed to the position of executive vice president and chief operating officer. He was formerly the executive vice president of construction materials.

Robert A Wason IV, aged 61 and senior vice president - general counsel, will retire from Vulcan at the end of October 2013. He will now assume the role of senior advisor to the executive management team until that time.

Michael R Mills, aged 52 currently senior vice president - east region, has been appointed to the position of senior vice president, general counsel. He will report to Donald M James, chairman and chief executive officer. Mills will also serve as the company's corporate compliance officer.

John R. McPherson, aged 44 and currently senior vice president - strategic planning and business development, has been appointed to the position of senior vice president - east region. He replaces Michael Mills and will report to Danny Shepherd in his new role as executive vice president and chief operating officer.