O’Sullivan Bros. Brewing CO.

Irish heritage and California creativity to create fine craft Ales & Lagers.

Five brothers thought it might be a good idea to pull the family together and make some tasty beer – Brewed right here in San Diego. We’re now off and running! We hope you enjoy our beer.


Our Brewery

Our task is to create thoughtful and cleverly constructed artisan craft ales and lagers that stimulate the palette and arouse the senses.

We will use science to control, monitor and make intelligent decisions about our recipes and brewing process. We will pursue innovation and keep our thoughts and processes open to creativity.