Dr. Joseph V. Sak died at the age of 80, on Monday July 13, 2020 at the Parker Home, Monroe NJ. He died from complications due to Multiple Sclerosis. Dr. Sak was born in Zlin, Czechoslovakia. He grew up in the town of Krivoklat, Czechoslovakia. He studied physics at the Charles University in Prague, Czechoslovakia and finished his PhD at the Czechoslovak Academy of Sciences in Prague in June of 1968. He left Czechoslovakia in the fall of 1968 after the invasion of the Soviet Army and came to the University of Marburg in West Germany, where he worked as a Physics Research Associate. In 1969 he found a job at the University of Massachusetts in Amherst, MA, and moved his family to the United States. Later on he taught Physics at the University of Chicago, Illinois and Cornell University, Ithaca, NY. He then achieved a full professorship and tenure at Rutgers University, NJ. He retired from Rutgers in 2006. Joseph was an avid thinker and was always looking for the next discovery and development in Physics. He had the opportunity to work with some of the greatest Physics’ minds including Kenneth Wilson (1982 Nobel Prize winner in Physics) and Anatoly Larkin (Russian theoretical physicist). His passions included a love for opera, languages, and jazz. He frequented the Metropolitan Opera in NYC and even learned Italian so he could understand the Italian Operas without having to read the subtitles. He taught himself English while in his late teens/early 20’s knowing that he wanted to come to America one day. He spoke a total of six languages. He is survived by his wife of almost 60 years, Ludmila Sak (nee Jandova); daughter, Olga Horoho (Sak) and her husband Kristopher J. Horoho; as well as two grandchildren, Kristen Marie Horoho and Kenneth Joseph Horoho. He is also survived by his sister-in-law Rose Nikodym from Toronto, Canada and family. Due to the CoVid-19 pandemic restrictions, a later date will be selected for family and friends to spend time celebrating Joseph’s life. Boylan Funeral Home, 188 Easton Avenue in New Brunswick has been entrusted with the arrangements. In memory of Joseph, donations may be made to the Multiple Sclerosis Association of America, 375 Kings Highway North, Cherry Hill, NJ 08034 or mymsaa.org.