noun
A person who oversees or manages an organization, operation, or group. Formal and somewhat bureaucratic.
彼はプロジェクトの統轄者として全体を管理している。
He manages the whole project as its supervisor.
監督者 focuses on directing or overseeing work, like a foreman or director, whereas 統轄者 implies broader, higher-level control.
Compound of 統轄 (とうかつ, 'unified control') + 者 (しゃ, 'person'). The exact historical derivation is uncertain, but the kanji components reflect the meaning of a person who exercises comprehensive oversight.