Ashton Lewis wears many brewing hats. He is the Master Brewer at Springfield Brewing Company and Process Engineer for Paul Mueller Company in Springfield, Missouri where he helps design brewing systems for commercial breweries large and small. As pictured here, Ashton is also BYO's own "Mr. Wizard" columnist and has answered hundreds of brewing questions in his popular column since the magazine launched in 1995. He holds a master's degree in brewing science from University of California - Davis.

A collection of his favorite questions and answers, "The Homebrewer's Answer Book" was released in 2007. In addition, Ashton is also BYO's Technical Editor, reviewing every article for accuracy.  And now he is blogging for byo.com and all things beer and brewing. Have a question for Ashton? Email him at This e-mail address is being protected from spambots. You need JavaScript enabled to view it