William J. Seifer, 90, of Economy, passed away peacefully on June 23rd, 2026. He was born on March 4th, 1936, a son of the late William F. and Barbara Seifer. In addition to his parents, he was preceded in death by his brother, Arley Seifer, and his sister, Arlene Delaich. She is survived by his beloved wife of 70 years, Kathleen Seifer, his children: Terri (Michael) DeCurtis and William R. Seifer and his girlfriend, Janeil Machiko, Tammy Kelleher, and Wendy (Christopher) Stoll; as well as his cherished grandchildren: Brianna, Brandon, Patrick, Tim, Michael, Chelsie, Trisha, and Stacy; along with his 12 great-grandchildren, including his special little nurse, Octavia, as well as many nieces and dear friends.
William proudly served the City of Pittsburgh as a police officer for nearly 30 years. He was an active member of the Beaver Valley Yacht Club, the Fraternal Order of Police Lodge No. 1, the Knights of Columbus and the Blue Knights Motorcycle Club. In his free time, he enjoyed fishing, hunting, golfing, camping, boating and riding his motorcycle with his wife. Above all else, he treasured the time he spent with his family, who were the center of his life.
Family and friends will be received on Sunday, June 28th, from 2-4 p.m. at Alvarez-Hahn Funeral Services and Cremation, LLC, 547 8th Street, Ambridge, who was in charge of his arrangements, and where a blessing service will be held on Monday, June 29th at 10:30 a.m. with burial to follow at Rehoboth Cemetery, Conway Wallrose Road, Economy.










