The pair are both in the running for the Fuller's 1845 ‘Best Beer Writer’ accolade in the Trade Media category.
Last year Brown won the Caledonian Brewery Award for Best Beer Communicator – Online, while Protz won the silver award with Adrian Tierney-Jones for Best Beer & Travel Writer.
The men are among 27 journalists, writers, bloggers and broadcasters to reach the last stage of the competition, which covers nine categories.
Judging of the awards
Judges include Rebecca Smithers, consumer affairs correspondent at The Guardian; Kate Nicholls, chief executive of the Association of Licensed Multiple Retailers and last year's Beer Writer of the Year, Breandán Kearney.
"Whittling down the large initial field to a shortlist was a challenging task, but one that proved to be enjoyable thanks to the high standard of the entries overall,” Kearney said.
Quality of entrants
"It was especially pleasing to see high quality work submitted from both established names and from less well known entrants, and to see how creatively people are communicating about beer and pubs across a range of platforms.”
The winners for each category will be announced during a ceremony at the Park Lane Hotel, London, on 1 December.