Authorities say the parent of the teen alerted police on Monday after discovering that the girl was having a sexual relationship with a 37-year-old man.
After an investigation, Gionatan Ricard Almaraz was taken into custody on numerous charges related to felony sexual contact with a minor and seducing a minor via telephone/Internet.
Investigators say the Moreno Valley resident is a staff member at the Riverside Apostolic Church, where the teen is also a member. The alleged sexual assault occurred at the church, police said.
Almaraz is being held on $75,000 bail. Anyone with information is urged to call Riverside Police Detective Melissa Brazil at (951) 353-7121.