Krentzman began his career at Unilever, where he served in various sales and marketing roles, including director of marketing for Unilever's flagship brand Lipton tea during the Tetley and Snapple tea wars. He was previously director of marketing for condiments and snack brands, including Wish-Bone salad dressings and helped create and then managed the fruit snack segment, including Sunkist, Nintendo, Disney, and Warner Bros brands.[1][5] He also developed the national sales strategy for Equal, a sugar substitute.[1]
In 1997, Krentzman joined Oki Data Americas, Inc., a 1200-employee division of $3B Tokyo-based Oki Electric LTD., an imaging and biometric company in Mount Laurel, New Jersey as the vice president of the inkjet printers division.[4] In 2001, he became the senior vice president of sales and marketing and a year later he was appointed as the chief operating officer of the company.[6][7] From 2003 until 2010, Krentzman was the president and chief executive officer of the company. He was named to the "Top 100 Most Influential People in Technology" in 2009 by CRN Magazine.[8][9] He served as a board director of Oki Data Corporation in Tokyo, Japan.[10]
Later in his career, Krentzman developed an expansion strategy for the healthcare segment at the Jay Monahan Center for Gastrointestinal Health at New York Presbyterian Hospital - Weill Cornell Medical Center.[1][11] Additionally, he worked on a project exploring implementing a concierge medicine model in the United Arab Emirates.[1]
Since 2009, Krentzman has been the president of The BBQ Cleaner, LLC in Hackensack, New Jersey, with 315 locations across the United States and Canada.[4]
In 2017, Krentzman and his wife co-founded the New Jersey Friends of Memorial Sloan Kettering. In October 2023, they established Survival+ for Schools, Inc., a non-profit organization focused on addressing school violence. [4][12]
In September 2025, they will launch https://ClassNeighbors.com, an innovative AI tool designed for elementary school teachers to non-invasively monitor student interactions, thereby helping to provide a safe learning environment for all students.