I want my Monkey and Sheep Back

[Kettricken]

I still care so much for him and want him to do well in life and I feel like if I don't tell him this, his career will suffer.

This is really a no-brainer. If you have his old cellphone number, this kind of thing is bound to happen occasionally. No need for drama. If this is a positive opportunity for him, drop him a very brief email or text about it to the best contact for him you have. Tit-for-tat and vengeful scorekeeping is no way to run any kind of relationship. Lead by example.