Judge Prabhat Kumar Shastri also imposed a fine of Rs. 10,000 on the accused.
Sarthi has vowed to appeal against the court decision while the victim has welcomed the verdict. She said the court verdict would be a lesson for those who misused their official post to physically exploit female juniors.
Sarthi and the victim both belong to the tribal community.
Police said Sarthi has been sent to judicial custody in Jashpur.