A former San Mateo County Probation Department employee accused of having sex with his underage charge in a South San Francisco parking lot last year took a plea deal Monday that ensures he will spend no more than two years in state prison.

Carlos Alberto Ordonez Jr., 25, pleaded no contest to one felony count of unlawful intercourse with a minor under 16, and one misdemeanor count of molesting a child. In exchange, prosecutors dropped an additional misdemeanor charge of contributing to the delinquency of a minor, said Deputy District Attorney Rebecca Baum, who prosecuted the case.

The former group supervisor at the Margaret J. Kemp Camp for Girls was arrested Feb. 23, 2007, by South San Francisco police after an officer saw him and the 15-year-old inside of a parked car in Oyster Point.

tbarak@sfexaminer.com