Glen is best known for his work as a film editor, and director of the five James Bond films of the 1980s:
He has directed more Bond films than any other director. Glen served as film editor and second unit director on three earlier Bond films:
Glen has also directed the feature films Christopher Columbus: The Discovery (1992) and The Point Men (2001) in addition to the television series Space Precinct. His other films as second unit director include Superman and The Wild Geese (both 1978). In 2001, he published his memoir For My Eyes Only.