Here is a worksheet on the correct usage of job titles, particularly in the capitalization rules for those titles. This is a full-page document with a reading of nine sentences and ten sentences for editing to find the right fit for the title in question. This worksheet is, incidentally, another in a series of 100 that will eventually appear on this site, adapted from Paul Brians’ excellent usage manual Common Errors in English Usage.
Did you know Professor Brians allows access to his book at no cost at his Washington State University website? You should buy a copy anyway, though.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.