tactician; strategist; schemer
Refers to a person skilled in planning tactics or strategies, sometimes with a negative connotation of scheming or maneuvering.
He is an excellent strategist who always outwits his opponents.
あの政治家は策略家として知られている。
That politician is known as a schemer.
Compound of 策略 (tactic, scheme) and 家 (person with a certain trait or profession).