21st Amendment Co-Packing and Brewing Company Welcomes Peter Wiens as Plant Manager

San Leandro, CA – January 10, 2025 – The 21st Amendment Co-Packing/Brewing Company is proud to announce the appointment of Peter Wiens as its new Plant Manager. A 25 year industry veteran with an exceptional track record spanning iconic breweries and global beverage leaders, Wiens brings a wealth of expertise and innovation to the 21st Amendment family.

Peter Wiens’ distinguished career includes pivotal roles at some of the world’s most renowned brewing institutions. Most recently, as Brewmaster at Guinness/Diageo Open Gate Brewery and Barrelhouse, Wiens led groundbreaking projects that redefined brewing excellence.

Previous to that, he led Stone Brewing Company as Brewmaster and Senior Director of Brewery Operations East Coast where he navigated complex operations while maintaining the highest standards of quality and creativity.

Prior to his time at Stone, Wiens was at his family’s brewery, Wiens Brewing Company, where he served as Director of Operations. In that role, he led all aspects of brewing, quality, and packaging, including the install and startup of the brewery.

Wiens also spent twelve years in various roles at Anheuser-Busch, where he served as Senior Manager of Quality and Business Manager, among other positions. His work there honed his skills in scaling production while adhering to meticulous quality controls, a skill set that aligns perfectly with the 21st Amendment’s commitment to excellence. 

“We are thrilled to welcome Peter Wiens to the team,” said both 21st Amendment Co-Founders Nico Freccia and Shaun O’Sulivan. “Peter’s unparalleled industry knowledge and leadership will elevate our brewing operations, enabling us to better serve our partners and customers while driving innovation and expanding our capabilities in the craft and co-packing space.”

In his new role, Wiens will oversee all brewing and production operations, focusing on expanding the company’s capabilities, enhancing quality assurance, and fostering the development of new and exciting products.

“I am honored to join 21st Amendment Co-Packing/Brewing Company,” said Wiens. “This is a dynamic team with an incredible reputation, and I look forward to building on their success by bringing my passion for brewing and operational excellence to this exciting new chapter.”

The 21st Amendment Co-Packing/Brewing Company is recognized for its state-of-the-art facilities and dedication to brewing world-class beverages for its own portfolio and its trusted partners. With Wiens at the helm of brewing operations, the company is poised to continue its trajectory of growth and innovation.

About 21st Amendment Co-Packing/Brewing Company

21st Amendment Co-Packing/Brewing Company is a leading provider of co-packing and brewing services based in San Leandro, CA. Founded by Nico Freccia and Shaun O’Sulivan, the company is dedicated to producing exceptional craft beer and beverages for its own brands and partners nationwide. For more information, visit 21acopacking.com and 21st-amendment.com.