A prolific striker, De Gier joined Cambuur Leeuwarden in 1991 and later played for Go Ahead Eagles, Willem II Tilburg, Lierse SK, NEC Nijmegen, Dunfermline Athletic and FC Twente.
A skilled forward, De Gier joined Cambuur Leeuwarden in 1991 and later played for Go Ahead Eagles, Willem II Tilburg, Lierse SK, NEC Nijmegen, Dunfermline Athletic and FC Twente.