Irwin Chafetz (1932-2018) was an American real estate developer and prominent business executive, best known for his decades-long association with the Adelson family and his role in the early development of Las Vegas Sands Corporation. Born in the United States, Chafetz built a successful career in real estate, primarily in the Boston area, where he founded and led several development firms. His professional relationship with Sheldon Adelson began in the 1970s through involvement in the computer trade show industry, including COMDEX, which Adelson's Interface Group organized. Chafetz served as a director on the board of Las Vegas Sands from its founding in 1988 until his death in 2018, contributing to the company's expansion into casino and resort operations in Las Vegas and later internationally. He was recognized for his loyalty and discretion in business dealings, often acting as a trusted advisor to the Adelsons. Beyond real estate and gaming, he had interests in various investments, though he maintained a relatively low public profile. His tenure on the Las Vegas Sands board overlapped with key milestones, such as the construction of The Venetian resort. Chafetz passed away on October 28, 2018, at the age of 86, leaving a legacy tied to the growth of one of the world's largest casino operators. He was survived by his family, including his wife and children, and was remembered in business circles for his strategic acumen and personal integrity.