In August 1994, the C.C.G.S. Louis S. St. Laurent and the U.S.C.G.S. Polar Sea icebreakers entered history as the first North American surface vessels to reach the North Pole. Walker is listed in the Canadian Archives as ship's artist and his work depicting this expedition has been featured on the A&E Network.

Walker's paintings can be found in international private and corporate collections in England, Germany, Japan, the United States and elsewhere. He continues his conceptual development at his studio on Vancouver Island, British Columbia.