Dennis R. Knowles is the new senior vice president of store operations for the South Central division of Lowe's. He succeeds Michael K. Brown, who was promoted to the position of executive vice president of store operations in December. Mr Knowles now has responsibility for the activities of more than 280 stores in eight federal American states in his new function. He has worked at Lowe's since 2001, his last position being that of regional vice president of store operations in the West division.