Maybe we could back it all up and ask the question: how was he chosen? By other students? By faculty?
Has he spoken with his Orthodox pastor? And should not this occur before other questions are answered?
Is he even active in the Orthodox parish to which he belongs?
In the possibility that the Orthodox pastor may not be in favor of this, it would seem those issues would need to be addressed first, then the issues of whether or not he should go forward with the the position, and then a definition scope of the duties of a student chaplain as they may apply to him.
I am not suggesting that this is based in “sheep stealing”, but that issue has been one between the Orthodox and the Church. Rather than moving forward on the chaplain issue, it would seem better to sort out how the other side views this. If the pastor has issues with it, then it would seem that encouraging the student to follow the practices of his Church would be the better course; and a possible learning lesson not only to him, but all the other students too.