Despite being based entirely in Britain, Harry has appeared in a large number of American films, due to filming taking place partly or entirely in Britain. His film credits include Star Wars: A New Hope, McVicar, Highlander and Oliver!. Harry has appeared in a wide range of television shows including Doctor Who, Blake"s 7, Shoestring, The Sweeney, Minder and The Professionals.
Harry co-presented CBTV, a Thames television programme for younger viewers, in the 1980s where he played the Security Guard, Harry, who Jim Sweeney and Steve Steen would have to sneak past on the gates of Teddington Studios.
In 2012 Fielder published his autobiography Extra Extra, Read All About lieutenant!: My Life as a and television Extra. He is sometimes credited as Harry H. Fielder or Harry Aitch Fielder.