Sergeant David Smith began his law enforcement career as a police officer with the Indio Police Department after graduating from the San Bernardino Sheriff's academy in 1993. Sergeant Smith joined the Riverside County Sheriff's Department in August of 1998, as a deputy sheriff assigned to the patrol division, at the Indio Station, where he was assigned to patrol the cities of La Quinta, Coachella, and the surrounding unincorporated communities.
In 2000, Sergeant Smith was promoted to senior deputy and assigned to the City of Coachella to support traffic investigations and enforcement. In 2001, Sergeant Smith was selected to the position of motorcycle enforcement officer in Coachella. Later that year, Sergeant Smith was promoted to the rank of corporal within the Indio Station.
Sergeant Smith was promoted to Sergeant in 2006, and was assigned to the Robert Presley Detention Center (Riverside Jail) in downtown Riverside. In 2007, Sergeant Smith was re-assigned to the Indio Jail.
In 2009, Sergeant Smith served at the Palm Desert Station as a patrol watch commander. In 2012, Sergeant Smith was selected to supervised the Palm Desert Business District Team.
In June of 2017, Sergeant Smith was transferred to the Thermal Station where he supervised patrol functions. In October of 2017, Sergeant Smith was selected as the La Quinta Police Administrative and Traffic Sergeant. In this position, Sergeant Smith is responsible for supervising the Traffic Enforcement Team, School Resource Officer, and La Quinta Volunteer Program. Additionally, he supports the daily police administrative duties for the La Quinta Police.