Is "the scope of one's work" correct?

Suppose that Tom and his colleague, Bill, have their own set of duties. The duties they both do are unrelated. For some reason, Tom wants to perform one of Bill's duties without permission during their manager's absence. I have made up a sentence about this.

(ex) Tom is intruding upon the scope of Bill's work.

Is "the scope of one's work" correct? Thanks a lot.