Presumed to be the manager at Freddy Fazbear's Pizza
Scott is the main protagonist. In The Joy of Creation, he cannot be seen, even if by pressing M. He is widely assumed to be Scott Cawthon, but Nikson confirmed that this is not the case. Scott is just a random person who happens to have the first name of Scott. He is also an entirely different person that the protagonist of The Joy of Creation: Story Mode, as in that game the 'Scott' referenced is actually supposed to be Scott Cawthon, according to the final cutscene where the player is referenced as such. All of this was stated by Nikson on a QnA.
Like the main characters of Five Nights at Freddy's, Scott is a silent character. It could be possible that Scott may be the manager at Freddy Fazbear's Pizza, since the Phone Guy calls him up once-in-a-while to tell him what is up with the company.