noun
party officer; party executive
Refers to an official holding a position within a political party's organizational structure, such as a secretary-general or committee chair.
彼は党役員として選挙戦略を担当している。
As a party officer, he is in charge of election strategy.
党役員会議で新しい方針が決まった。
The new policy was decided at the party executive meeting.
役員 is a broader term for any officer or executive (e.g., in a company), whereas 党役員 is limited to political party officers.
Compound of 党 (party) and 役員 (officer, executive). The exact historical derivation is straightforward; the term is a modern political compound.