Taskmaster (noun)

A person who assigns and oversees the work of others, typically in a strict and demanding manner.

Origin:

The word taskmaster is a combination of the words "task" and "master".

Examples:

1. The new manager was a real taskmaster, he expected everyone to work long hours and never seemed satisfied.
2. She was a taskmaster, always pushing her team to work harder and meet deadlines.
3. The taskmaster was a stickler for detail and expected everything to be done to perfection.
4. The taskmaster was known for his micromanagement style and his ability to get the most out of his team.
5. The taskmaster's leadership style was controversial, some people found it motivating while others found it oppressive.