Leadership at West Penn Hospital

Doug Johnston currently serves as president of AHN West Penn Hospital. Johnston joined Allegheny Health Network in 2015 and most recently served as chief operating officer of AHN West Penn Hospital, where he helped lead daily operations, service line strategy, operating suite growth initiatives and the approval process for the hospital’s Institutional Master Plan. He also played a key role in advancing employee engagement efforts and operational performance across the organization.

Before joining West Penn Hospital, Johnston served as vice president of operations at AHN Allegheny Valley Hospital, where he led operational improvement initiatives and campus infrastructure projects. He also previously served as vice president of strategic operations for Allegheny Health Network, overseeing AHN’s annual capital budget and supporting strategic planning efforts across the network.

In his current role, Johnston works in partnership with physician leaders and AHN executives to advance West Penn Hospital’s clinical services and support AHN’s central region growth strategy. Prior to joining AHN, he held strategic and operational leadership roles with Highmark Inc. and Accenture, where he led large-scale transformation initiatives, investment planning, mergers, business process optimization and stakeholder engagement efforts. Johnston earned a bachelor’s degree in management science and information systems from Penn State University's Smeal College of Business.

Anthony X. Baroni, DO, is the chief medical officer of West Penn Hospital.

Dr. Baroni, a hospitalist, has been affiliated with AHN since 2001, when he joined AHN Allegheny General Hospital and the former AHN Suburban Hospital as an attending physician. Over the last two decades, he has served in a variety of network and academic leadership roles, primarily at WPH.

Previously, he served as the medical site director for the WPH Hospitalist Program, associate program director for the combined AGH and WPH Hospitalist Program, the medical director of the WPH Observation Unit, as an AHN and WPH Physician Advisor, and co-medical director of the WPH stroke program.

He is also an associate professor of Internal Medicine at Drexel University College of Medicine, which has a clinical campus at AHN, and a teaching attending physician at WPH and AGH.

Dr. Baroni earned his undergraduate pharmacy degree from the Duquesne University School of Pharmacy, and his degree in osteopathic medicine from the Philadelphia College of Osteopathic Medicine.

He completed his residency in internal medicine at West Penn and is board-certified by the American Board of Internal Medicine.

Julie Mazur (MHA-MBA, BSN) is the Chief Nursing Officer of AHN West Penn Hospital. A seasoned nurse leader, Ms. Mazur has broad management experience across various health care units, including med-surg, to labor & delivery, and perioperative/OP Services. Since 2020, Ms. Mazur has been the director of Preoperative and Cardiac Services at West Penn Hospital.

In her current role, Ms. Mazur has proven to be a transformational, transparent leader who promotes fair and just culture.

She was the recipient of the AHN Leadership Award for Perioperative Services in 2022.

Ms. Mazur received her BSN from Franciscan University of Steubenville, Ohio, in 1993 and graduated with her Master’s in Health Care Administration (MBA) from South University in Georgia 2019.

Kelly Herrera is the Chief Financial Officer at West Penn Hospital. She has been a part of the AHN family since 2016.

Prior to her current role, Kelly has held various roles within the network, including Director of Finance for the Cardiovascular Institute, and her most recent role as Director of Finance for Allegheny General Hospital. She has also held roles in finance analytics as well as Management for Perioperative Business Operations for both Jefferson and Canonsburg Hospitals.

She also currently serves as the Chief Financial Officer at Allegheny General Hospital.

Kelly has worked in healthcare for 16 years and attended the University of Pittsburgh, Katz College of Business Administration.