The accused identified as 39-year-old Dere Sachin Pravin met the victim on Facebook.
Sachin was convicted before the State Courts on three counts of sexual penetration of a minor under 16, with two other counts taken into consideration, Channel News Asia reported.
The accused was living with his wife at an apartment along Flora Drive in the Upper Changi Road North area. He came to Singapore to work in 2011.
Police received a report on Dec 14, 2014, by the minor's aunt after she had discovered some messages on the minor's Facebook account from two men. One of them had been talking about sex.
For sex with a minor, Sachin could have been jailed up to 10 years, received a fine, or both.