Bill Maca
Special guest
Bill Maca is the proprietor of HWM Yeast Solutions LLC, a consulting firm providing services in the areas of yeast propagation, yeast management, fermentation and troubleshooting microbiological related issues in breweries and wineries for the past 13 years. He has consulted in the craft brewing industry for breweries ranging in size from 2,000 to 500,000 barrels of production per year, as well as work with beverage giants in Mexico and Canada. Bill worked over 45 years in the brewing industry, beginning with quality control at Miller Brewing's Albany, Georgia facility, and working in various capacities in both quality and research and development for Miller Brewing (SABMiller, MillerCoors) before retiring in 2013 from his position as the Senior Yeast/Fermentation Scientist at the MillerCoors Technical Center. He holds advanced degrees in both microbiology and environmental engineering.
Bill is an active member of the Master Brewers Association of the Americas (MBAA) and the American Society of Brewing Chemists (ASBC) and has been a guest lecturer for the MBAA's Brewing and Malting course and Brewery Packaging Technology course. He is also an extended faculty member for the Siebel Institute of Technology in Chicago, instructing for several advanced and intermediate level courses and programs, such as the WBA Master Brewer, WBA International Diploma in Brewing Technology, WBA Advanced Brewing Theory programs, WBA Concise Course in Brewing Technology, as well as the Brewing Microbiology and Essential Quality Control courses, and contributes to the Siebel Institute's consulting arm on an as needed basis.
Bill Maca has been a guest on 3 episodes.
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Episode 359: Brewing Yeast Volume 1: Yeast Fundamentals and Propagation
May 4th, 2026 | 41 mins 59 secs
A discussion with the authors of a new book about yeast.
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Episode 220: Consistent Fermentations
June 23rd, 2025 | 52 mins 29 secs
How to keep your brewery from becoming condominiums.
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Episode 113: Reducing Error in Cell Counts
December 19th, 2022 | 37 mins 24 secs
It doesn't matter how good you are at counting cells if the sample wasn't prepared and handled properly. Bill Maca takes us on a deep dive into the most important part of yeast cell counts that nobody talks about.