Justin Curtis Price, 36, formerly a fire engineer-paramedic who had been with the San Diego Fire-Rescue Department for 10 years, pleaded guilty last year for the encounter with the teenage victim, who had turned 17 a few weeks prior.
Price, who had known the victim since she was 9 years old, was arrested about six months after the encounter, in April 2019.
Preliminary hearing testimony indicated Price admitted, in text messages with his wife, to having sex with the teen about two weeks after her 17th birthday.
Price made a statement to the court Wednesday in which he said he did not "deserve (the victim's) forgiveness or trust, and I don't expect you to forgive me.
San Diego police Detective Jeremy Margolis testified that he interviewed the victim, who said Price told her not to tell anyone about what happened, and that it would be "our little secret."