There are two artists sharing this name. 1. The Sentinel is an alias of Photek (aka Rupert Parkes), showing a more ambient side to his productions releasing his first single on Basement Recordings in 1994. 2. The Sentinel (Patrick Wacher) co-owns and produces for the Southern Outpost record label. He has recorded under such aliases as Agent Patrick and Mr. Microprocessor. The Sentinel/Agent Patrick has produced & co-produced 7 of the 10 releases on Southern Outpost.