I agree with Tim
2 batches a week is the limit for 1 person considering there is no packaging work. Also the brewery layout can restrict what a brewer can do, so the lay out is essential to keeping labor costs low.
A brewers only concern in the business should be the beer and keeping it flowing. Any side jobs(to save the company money) will only distract the brewer for what is a very timing oriented production schedule.
The actual job description can vary somewhat, it depends on whether the brewer is also working as the consultant(who usually produce's the recipe's for the brewery).
Pay is really not part of any job description unless it refers to bonuses paid for whatever criteria the hammer out between them(owner, brewer).
You really need to divulge more info on the setup of the brewery and what you expect before a job description can be written!
Doug A Moller
Doug's Brau Haus