Scotting will replace Peter Kukielski, chief executive since December 2008, who is leaving the company on August 3 to take up a new opportunity. "Until that time, he will be working closely with Bill to ensure a smooth transition," ArcelorMittal said in a statement.
It said Scotting has over 25 years experience in the metals and mining industry in strategic, operations management, technical and consulting roles. He joined Mittal Steel in 2002 to lead its performance enhancement activities and is a member of the group's investment allocation committee and group risk management committee.
Scotting, who has previously held positions at McKinsey & Company, BHP Steel, CRU International, Mascott Partnership and Pioneer Concrete, will report to the group chairman and chief executive, Lakshmi N Mittal.
Commenting on the development, Mittal said: "Today, ArcelorMittal Mining is a world class mining business with top class assets, exciting growth prospects and a great management team.
"Bill was a natural choice to succeed him due to his combination of strategic and operational excellence experience as well participating in many of the performance-improvement initiatives launched from our corporate and segment offices."
Scotting said: "As one of the company’s identified franchise businesses, the mining segment is key to ArcelorMittal. There are a number of important priorities... (including) to complete the company’s growth plans to reach iron-ore capacity of 84 million tonnes by 2015."
Separately, the company also announced today that it has appointed Marc Vereecke chief operating officer of its ACIS segment. He will report to Gonzalo Urquijo, member of the group management board of ArcelorMittal with responsibility for ACIS.
ArcelorMittal is the world's leading integrated steel and mining company, with a presence in more than 60 countries. In 2012, it had revenues of $84.2 billion and crude steel production of 88.2 million tonnes, representing approximately 6 percent of world steel output.