Simplify the following text for a Grade 8 native English-speaking person.
Original: During World War II , Choules was the Acting Torpedo Officer of Fremantle and also the Chief Demolition Officer on the western side of the Australian continent .
Simplified: During World War II , Choules was the Acting Torpedo Officer of Fremantle . He was also the Chief Demolition Officer on the western side of the Australian continent .