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Yehuda Zisapel (1942-2024) was a prominent Israeli entrepreneur, businessman, serial founder, investor, and philanthropist. He was best known for co-founding the Rad Group alongside his brother Zohar Zisapel, a conglomerate of over 20 high-tech companies specializing in cybersecurity, networking, and telecommunications. His entrepreneurial journey began with the establishment of RAD Data Communications in 1981, which laid the foundation for the Rad Group. This ecosystem grew into one of Israel's most successful tech ventures, contributing significantly to Israel's 'Startup Nation' reputation and employing thousands. Companies under the Rad Group umbrella include Radware (founded in 1997), which became a global leader in application delivery and cybersecurity solutions and went public on NASDAQ in 1999. Zisapel was known for his serial founder approach, spinning off numerous subsidiaries to address emerging tech needs and fostering innovation in Israel's high-tech sector. Beyond business, he was a dedicated philanthropist through foundations like the Zisapel Foundation, supporting education, scientific research, scholarships, tech incubators, and academic programs at institutions such as the Technion – Israel Institute of Technology. He also contributed to public policy, advocating for stronger ties between academia, industry, and government to bolster Israel's tech economy. Zisapel served on various boards and advisory councils, contributing to the growth of Israel's high-tech industry. His legacy includes fostering a family-oriented business model, with relatives involved in the Rad Group's operations. Zisapel received numerous accolades, including the Israel Prize for his societal impact. He passed away on March 10, 2024, leaving a legacy as a pioneer who helped shape Israel's position as a global tech powerhouse.