A single word for "someone who readily takes responsibility/new tasks" [closed]

Want to describe a characteristic of a person, in single word, "someone who readily takes responsibility/new tasks"

Solution 1:

You could say that they are proactive. From Wikipedia:

Proactive behavior involves acting in advance of a future situation, rather than just reacting. It means taking control and making things happen rather than just adjusting to a situation or waiting for something to happen. Proactive employees generally do not need to be asked to act, nor do they require detailed instructions.

It may not fit exactly, depending on the specific nuance you're looking for, but I'd say there's definitely an overlap in terms of attitude.

Solution 2:

Self-starter comes to mind, though that is a compound word, not a single one.

If you could be more clear with how/where you are intending to use this description, it might help.