You can say he shows "leadership".
- leadership - "the power or ability to lead other people" MW
"He showed strong leadership. That's why we was promoted."
- lead - (verb) -"to direct on a course or in a direction"
- leader - (noun) "one who has influence or power" - The Free Dictionary
Edit - As you have edited saying you don't mean someone who leads, but somenone who is experienced, influent, and whose opinion carries a lot of weight, a think you mean "a management guru".
- guru - "a person who has a lot of experience in or knowledge about a particular subject". MW
- An influential teacher or popular expert: ‘a management guru’ Oxford Dictionary Online