There 's Gary Halverson then chief executive officer of Cliffs Natural Resources Inc .
Gary Halverson went from his first upper management position as the general manager of New Britannia Mine and moved on to chief operating officer with Barrick Gold .
There 's Gary Halverson , who went from his first upper management position as the general manager of New Britannia Mine and moved on to chief operating officer with Barrick Gold , then chief executive officer of Cliffs Natural Resources Inc .