Jack served in the US Army 4th Infantry Division from 1959 to 1962. Jack began preparing for a career in business by earning a Bachelor of Arts in Business Administration at Marist College in Poughkeepsie, NY, where he met his wife(of 48 happy years), Georgia Lee. Jack left a lucrative corporate sales management career in 1972 upon the birth of their second daughter, Cheryl Lee. He entered the career of Real Estate because he felt that he wanted more flexibility to spend time with his family. Since then, he has been involved in the sale of over 2,000 homes. He was a top sales agent in Holt Cedarstrand Real Estate in Ridgewood throughout the 1970s and later became the manager of what would become Murphy Realty Better Homes & Gardens' top office in Allendale.
After only a few years, he was promoted to Vice President and head of the REO (bank-owned properties), division, which sold over 500 properties over a 4-year period. Jack sat on the REALTOR® Ethics and Arbitration Panel for 5 years. Beginning in 1991, Jack added Residential & Commercial Appraisal to which gives him a superior edge when it comes to pricing sellers' homes correctly.
Jack founded Arnt Real Estate & Appraisals in 1996. In 2002, when his son Chris joined the family business, they renamed it Landmark Realty of NJ, LLC in honor of their new location in the Ridgewood Landmark Building, circa 1789, where the Corporate Headquarters are housed.