In 1994, Garrett joined The Brooklyn Brewery as Brewmaster and partner. Many of his beers have won national and international awards. He has served as a judge for the Professional Panel Blind Tasting of the Great American Beer Festival for twenty years, and has been a perennial judge for the prestigious Great British Beer Festival competition and The Brewing Industry International Awards. He has hosted tastings and talks for numerous cultural institutions, including the Smithsonian, MassMOCA, the American Museum of Natural History and The Jewish Museum. In the United States, Garrett has made numerous radio and television appearances as a spokesman for craft brewing, including segments on NPR, CBS,CNN, ABC, PBS, MSNBC, WB, The History Channel, The Travel Channel, A&E, Emeril Live, , Roker on the Road, Bobby Flay's Food Nation and Boy Meets Grill, CBS' Martha Stewart Living, Fox & Friends, the WB Morning Show, PBS' Diary of a Foodie, and Food Network's Iron Chef America. Garrett's profile was featured in Gourmet magazine, which referred to him as "a passionate epicure and talented alchemist." A two-page profile in The New York Times Dining Section referred to his "brilliant" ability to match craft beer with great food.
Garrett has hosted beer tastings and dinners at many fine restaurants, cooking schools, and food events including several dinners at James Beard House, Per Se, Craft NYC, Oceana, The Waldorf-Astoria, Gramercy Tavern, Aubergine (London), Noma (Copenhagen), the Slow Food Cheese Festival and Salone del Gusto in Piemonte, Italy, Restaurant Roberta Sudbrack (Rio Di Janiero), Restaurant Julia (São Paulo), Anthony's (Leeds), Cape Wine 2006 (South Africa), The Association of Westchester Country Club Chefs, Artisanal Cheese Center, The American Institute of Wine and Food, The Culinary Institute of America, the Sommelier Society of America, The French Culinary Institute, The Institute for Culinary Education, Johnson & Wales University, National Geographic Live, the 2006 Cape Wine Conference (South Africa), and the 2008 GEL Conference. Garrett was a founding Board member of Slow Food USA and recently retired from the Board of Counselors of Slow Food International after a five-year term. He was also a 2009 and 2010 finalist for the James Beard Award as "Outstanding Wine or Spirits Professional."
Garrett's first book, The Good Beer Book, co-written with Timothy Harper, was published in 1997 by Putnam/Berkley Books. His latest book, The Brewmaster's Table: Discovering the Pleasures of Real Beer with Real Food, published by HarperCollins in May, 2003, is the winner of a 2004 International Association of Culinary Professionals (IACP) Book Award and was a finalist for the 2004 James Beard Foundation Book Awards. The Brewmaster's Table was released in a paperback edition in May of 2005. It recently went into its 5th printing.
Garrett is Brewmaster and Vice President for Production of The Brooklyn Brewery. He is a graduate of Boston University, and holds a degree in Broadcasting and Film. He is the recipient of the 1998 Russell Schehrer Award for Innovation and Excellence in Brewing, granted by the Institute for Brewing Studies. It is the highest award given within the United States brewing profession. He is also the recipient of the 2003 Semper Ardens Award for Beer Culture (Denmark) and Cheers Beverage Media's "Beverage Innovator of the Year" Award for 2006. In 2007, Forbes named him one of the top ten tastemakers in the country for wine, beer and spirits.