stern taskmaster

• disciplinarianStrict enforcer of rules
• taskmasterStrict work supervisor
• drill sergeantTrains raw recruits harshly
• perfectionistOne demanding flawlessness
• demandingRequiring great effort

rigorous · exacting · unforgiving · hard-nosed · authoritarian · tyrant · boss · overseer · relentless · harsh · strict · severe · unyielding · iron-fisted · no-nonsense · stickler · martinet · coach