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You can say he shows "leadership".

• leadership - "the power or ability to lead other people" MW

"He showed strong leadership. That's why he 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, I 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

You can say he shows "leadership".

• leadership - "the power or ability to lead other people" MW

"He showed strong leadership. That's why he 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, I 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

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

You can say he shows "leadership".

• leadership - "the power or ability to lead other people" MW

"He showed strong leadership. That's why he 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, I 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

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 say 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 "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

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