 He owned and ran two large and successful furniture salesrooms in the Borough Hall neighborhood of Brooklyn for most of his life after boxing and later had success as a real estate broker.Mosberg, who was Jewish, coached the United States boxing team at the 1953 Maccabiah Games.Mosberg assisted and coached a benefit for the American team headed for the Maccabiah Games in Jamaica, New York, on August 30, 1953, and coached, raised money, and acted as a speaker for amateur boxing on many occasions during his retirement.