Robert “Brett” Casey of Kennett Square

Robert “Brett” Casey, 72, died Monday, Dec. 13, at his home in Kennett Square, after bravely navigating the long, ever-changing challenges of Parkinson’s Disease. He was the husband of Mary Jo Casey, with whom he shared 24 years of marriage.

Robert Casey

Born in Waltham, Mass., he was a son of the late George Casey and the late Wilhelmina Jackson Spohn.

Brett earned his bachelor’s degree in chemistry from the University of Delaware and his master’s degree from Wilmington University.  He had a long career in pharmaceutical chemistry including positions with Warner Lambert, Pfizer, Roche, Genentech, and other laboratories.

Brett loved music and was a skilled vocalist, pianist, and guitarist. He was a central player in many bands for more than 40 years and enjoyed the comradery of harmonies and instrumentation, from small bar rooms to festivals of over 40,000 fans. Beyond musical pursuits, he had a love for the quiet world of plants and gardening, creating gorgeous landscapes wherever he lived. He inherited a passion for hiking from his father, and he proudly walked alongside his dad to complete the last 140 miles of the Camino de Santiago in Spain.

In addition to his wife Mary Jo Casey, he is survived by a sister, Mary Cloud Casey, and was preceded in death by his brother, Colby Lance Casey. He has four sons, David C. Casey, Christopher A. Cotter, Brian S. Cotter, and J. Adam Cotter, and two granddaughters, Sheyael Cotter and Sydney Cotter.

You are invited to celebrate Brett’s life at a service being held at 10 a.m. Saturday, Dec. 18, at Kennett Square Golf & Country Club, 100 E. Locust Lane, Kennett Square, PA 19348. Brett's family kindly asks that masks be worn. Interment will be held privately. Contributions in his memory may be made to The Michael J. Fox Foundation online at

Arrangements are by Matthew J. Grieco of Grieco Funeral Home & Crematory, Inc (484-734-8100) Condolences at

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