Risk averse manager is someone who is afraid of or sensitive to risk. An individual that would trade for sure amount that is less than the expected value of the gamble.

You cannot be adverse to risk, but you can be averse to it.

A person can be risk averse for many reasons. Risk aversion occurs in many fields, including psychology, economics, and finance and in general, refers to one's desire to prefer bargains that are more certain.

I am averse to gossip but it is difficult to avoid it.

He was not averse to some hard work.

He was averse to having to go to the city.

Averse means to really not like something.