Julian Krinsky was born in South Africa and it was there that he developed into an outstanding tennis player. He was ranked ninth in the country in 1969. In that same year, Julian competed in the Monte Carlo Open and at Wimbledon, and represented South Africa in the Maccabiah games where he won a bronze medal in singles tennis and a silver medal in doubles tennis. In the following year, Julian played in the French Open. He won a bronze medal in tennis doubles in the Maccabiah games in 1973.
Julian immigrated to the United States in 1977 and settled in Philadelphia. He played squash in the Maccabiah games in 1981, this time for the United States, and won a silver medal. In 1989 Julian coached the United States Junior Tennis team in the Maccabiah games.
Julian began a small tennis camp program in 1977 with the campers sleeping in tents in his back yard. This has grown into a variety of summer programs (including a tennis program designed to meet the needs of Modern Orthodox Jewish athletes) that draw over 4,000 young people from over 35 states and 30 countries to nine camp sites. In addition to tennis, the program now includes instruction in golf, business (in conjunction with the University of Pennsylvania Wharton School), cooking, the arts, a fitness program (in conjunction with Canyon Ranch Health Resorts) and still other sports and subjects.