After a stint at Westerly Marine, Roy founded Macwester Marine in 1964. He is the designer of all the yachts produced by that company including the Macwester 26, 28, 30, Kelpie, Rowan 22, Wight Class, Macwester 27, Malin, Pelagian, Rowan 8m, Rowan Crown and Seaforth, as well as the Atlanta Rockall, Viking 800, Atlanta 28 and 8.5.