With C.S. Verma stepping down as the chairman and managing director of Steel Authority of India Ltd on completion of his tenure, Steel Secretary Rakesh Singh has taken up interim additional charge of the company until the successor is appointed. "Consequent upon completion of his tenure and in pursuance to ministry of steel order dated June 10, 2015, Verma has relinquished the charge of CMD of SAIL w.e.f. June 10, 2015," the company said in a filing with the Bombay Stock Exchange.