William Robert Weiss, Sr. (Bill), 80, of Lancaster, PA passed away July 15, 2025. Born in New York, he was the son of the late Ludwig and Rita (Siems) Weiss.

Bill was married to Jeanne Weiss, and together they shared 57 years of loving marriage. He was a member of the Saint John Neumann Catholic Church. Bill worked as a Chemical Engineer and Project Manager in the aerospace and pharmaceutical industries. He was an avid traveler and spent much of his career immersed in foreign culture. He enjoyed gardening, cooking, crossword puzzles, formula one racing, bicycling, and model railroads. Above all, Bill cherished spending time with friends and family, recounting the stories of his journeys across the globe.

Bill is survived by his beloved wife, Jeanne, and his children: John Weiss, husband of Karl Boggs; Joseph Weiss, husband of Kristin Dodds; William Weiss, Jr., husband of Robin Weiss; and Michael Weiss, husband of Shannon Small. Also surviving him are his granddaughters, Ana and Sophia Weiss. Bill is preceded in death by his brother, George Weiss.

Relatives and friends are respectfully invited to attend Bill's memorial service at Charles F. Snyder Jr. Funeral Home & Crematory, 3110 Lititz Pike, Lititz PA 17543, on Monday, July 21, 2025, at 11:30 AM. Friends may visit with the family from 10:30 AM until the time of service.