Lieutenant Perez was hired as a Police Officer for the City of South Gate in 1995. As an officer he served as:
- Crime Impact Team Officer
- Detective
- Field Training Officer
- Traffic Investigator
In 2004 he was promoted to Sergeant and supervised:
- Crime Impact Team
- Patrol
- Traffic
In 2011 he was promoted to Lieutenant. Lieutenant Perez is currently the Detective Bureau Lieutenant and has the responsibilities of:
- General Investigations
- Narcotics Investigations
- Record Bureau