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John “Jack” L. Armstrong, Jr., 82, of Limerick Township, PA, passed away peacefully on Wednesday, November 12, 2025, at the Hospice Unit of Phoenixville Hospital. He was the beloved husband of Jennifer L. (Stuempfle) Armstrong, with whom he shared 15 years of marriage.Born on October 31, 1943, to the late John L. Armstrong and Mary E. Chapman Armstrong, Jack lived a full, rich, and accomplished life. He most recently served as Executive Vice President – Technical Operations at CorMedix Inc. in Berkeley Heights, NJ, a role he held for seven years until his retirement in 2021 at the age of 78. His distinguished 40-year career in the pharmaceutical and biotech industry included leadership roles with ICI, Marion Labs, DuPont Merck, UroCor, Genaera Corp., Iroko Cardio LLC, and Correvio. A devoted member of St. Andrew’s Evangelical Lutheran Church in Audubon, Jack was a member and former leader of the Church Council and Endowment Board and was deeply committed to his faith community.Jack’s passions brought him great joy throughout his life. A loyal University of Kansas Jayhawks basketball and Kansas City Chiefs football fan, he cheered his teams on with unwavering enthusiasm, though he was known, on occasion, to miss some memorable endings after predicting the wrong outcome and turning the television off a bit too soon. He was also a true wine connoisseur, with an extraordinary appreciation for fine wines. Jack loved collecting, studying, and sharing wine, and he delighted in hosting tastings and introducing others to his extensive collection.He cherished time with his family, especially summers at their beach retreat in Avalon, NJ, and the many trips to Walt Disney World in Florida.In addition to his wife, Jennifer, Jack is survived by his children: John Paul (Sonya) Armstrong of Maineville, OH; Lucca A. Bilotti of Elkton, MD; Isabella S. Bilotti of Limerick, PA; and Jean L. Armstrong of Wilmington, DE; his sister Claire Smith of Smyrna, GA; and his grandchildren Abigail, Elliott, and Luke. He was preceded in death by his sister, Barbara B. Armstrong.Family and friends are invited to call from 5:00 to 7:00 p.m. on Sunday, November 16, 2025, and again from 10:00 to 11:00 a.m. on Monday at the Heintzelman Funeral Home, Inc., 326 Main Street, Hellertown. The funeral service will follow at 11:00 a.m., with interment concluding at Union Cemetery of Hellertown. A funeral repast will be held at The Carriage House at Heintzelman’s immediately following the graveside service. To share expressions of sympathy with the family, please visit www.heintzelmancares.com.In lieu of flowers, memorial contributions in Jack’s name may be made to a charity of one’s choice.

John "Jack" L. Armstrong

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