The Clyde F. Barker-William Maul Measey Professorship of Surgery

William Maul Measey
William Maul Measey
Clyde F Barker
Clyde F. Barker

Established by the Benjamin and Mary Siddons Measey Foundation, the Professorship honors both William Maul Measey (1875–1967), an alumnus of the University of Pennsylvania Law School Class of 1898, and Dr. Clyde F. Barker, MD, Penn’s longest-serving Chair of the Department of Surgery.

Dr. Barker chaired the Department of Surgery from 1983 to 2001. He initiated the University’s transplant program by performing a kidney transplant, now one of only a small number in the world that still functions 50 years later. 

William Maul Measey, a distinguished corporate attorney in Philadelphia, created the Benjamin and Mary Siddons Measey Foundation in 1958 to honor the memory of his parents. Since the Foundation supports several colleges, universities, schools of medicine, and hospitals in the Philadelphia area, the Measey name has become synonymous with the furtherance of medical education in the region. Penn’s transplant program grew to be one of the nation’s largest and most successful. Dr. Barker has published more than 430 scientific papers and is internationally recognized for his research and clinical expertise. Among his many honors, Dr. Barker is the current President of the American Philosophical Society, a member of the Academy of Medicine, and an Honorary Fellow of the Royal Colleges of England and Ireland.


schneiderCurrent Chairholder 

Darren Schneider, MD

Darren B. Schneider, MD, is chief of the Division of Vascular Surgery and Endovascular Therapy at Penn Medicine.

A national leader in vascular surgery, Dr. Schneider joined Penn Medicine from New York Presbyterian Hospital – Weill Cornell Medicine, where he served as chief of the Division of Vascular and Endovascular Surgery and Co-Executive Director of the Vascular Service Line.

Dr. Schneider received his medical degree from the University of California, San Diego. He was a resident in General Surgery at the University of California, San Francisco (UCSF), during which he also completed a three-year postdoctoral research fellowship at the Gladstone Institutes of Cardiovascular Disease. Subsequently, he was a fellow in Interventional Radiology and then Vascular Surgery at UCSF before joining its surgery faculty for eight years. In 2010, he was recruited to Cornell. Dr. Schneider was the Director of the Vascular Surgery Residency programs both at UCSF and Cornell. In addition, he founded the Big Apple Bootcamp for vascular surgery residents and fellows.

Dr. Schneider has extensive experience in minimally invasive procedures, as he was one of the first surgeons in the country to apply advanced endovascular techniques for the treatment of carotid disease, aortic aneurysms and dissections, and peripheral artery disease. His current clinical practice is focused on the treatment of complex aortic and iliac aneurysms, cerebrovascular disease, and limb-threatening lower extremity arterial occlusive disease, especially using advanced endovascular techniques.

In addition, Dr. Schneider has made numerous contributions to clinical research. He was the national principal investigator for the pivotal, multicenter trial that led to FDA approval of an iliac branch stent graft for iliac artery aneurysms. He is the principal investigator and sponsor of an ongoing, single-center, IDE study of endovascular repair of thoracoabdominal aortic aneurysms using branched and fenestrated stent grafts, which he will continue at Penn Medicine. 

Dr. Schneider is board certified in both surgery and vascular surgery. He will see patients at the Penn Heart and Vascular Center at the Perelman Center for Advanced Medicine.

Previous Chairholders

Ronald M. Fairman, MD