Moore became a partner in the brokerage firm Taylor, Bates & Co. in New York City.[1] He was a director of the Lehigh Valley Coal Sales Company.[2]
He consolidated the gains made by his father during the corporate merger or "Great Merger Movement" at the turn of the 20th century.[3] He reorganized Seversky Aircraft to form Republic Aviation in 1939 in Farmingdale, Long Island. He was a director and executive board member for Republic Aviation.[1]
Moore married Fanny Mann Hanna on October 30, 1909, in Cleveland, Ohio. She was a daughter of Leonard C. Hanna Jr. and niece to Mark Hanna and was a member of the Citizens Committee for Planned Parenthood of the American Birth Control League.[4] She was also the first female director of the Episcopal Church Foundation.[5] They had two daughters and two sons.[1] Their son, Paul Moore Jr., would go on to be the 13th Episcopal Bishop of the New York Diocese.[1] Their son, William Moore was a banker and chairman Bankers Trust.[1]
Moore hired architect Addison Mizner to build a 14,550 square feet (1,352 m2) mansion at 1820 S. Ocean Blvd. in Palm Beach, Florida; it was completed in 1926.[6]