noun
A person who provides guidance and support, especially in a professional or educational context.
彼は私のメンターとして、キャリアの相談に乗ってくれた。
He acted as my mentor and gave me career advice.
noun, noun or participle which takes 'suru'
mentoring
The act or process of mentoring; can be used as a noun or with する to mean 'to mentor'.
新入社員にメンターする制度がある。
There is a system for mentoring new employees.