Marcus has just graduated with his doctoral degree in cognitive psychology. He has accepted a faculty position at a university and will start in the fall. Marcus will likely start as a(n)

Assistant professor

Explanation:

Assistant Professor is a rank in the academy and is used in many universities. '

The rank of assistant professor is earned after graduating from a doctoral degree. It is a teaching position held at a university level. An assistant professor works under an associate professor or full professor.

The work of an assistant professor is to conduct researches, take classes, etc.

In the given case, Marcus will be starting a job as an assistant professor in cognitive psychology. Because he had earned his doctoral degree in the same.

So, the position that he had accepted in a faculty is of an assistant professor.