Taskmaster
Taskmaster was a term used to describe an overly harsh and demanding boss.
In 2374, the hologram of Leonardo da Vinci described his "patron", Tau, as a demanding taskmaster. (VOY: "Concerning Flight")
Later that year, The Doctor described a Hirogen overseeing his work as his Hirogen taskmaster. (VOY: "The Killing Game"
In 2381, Victoria Nuzé's exposé Starfleet's Shame, depicted Captain Carol Freeman as a "cruel taskmaster". (LD: "Trusted Sources")