The Leadership Team

Jorge A. Guzman, MD, MBA, Chief Executive Officer

Jorge A. Guzman, MD, MBA, is Chief Executive Officer and a consultant Staff physician in the Critical Care Institute at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health.

In his role, Dr. Guzman oversees Cleveland Clinic Abu Dhabi’s strategy and operations in addition to maintaining his patient facing clinical practice. Before taking over as Chief Executive Officer, Dr. Guzman served as the hospital’s Chief of Staff, leading the recruitment of physicians and spearheading programs to ensure Cleveland clinic Abu Dhabi continues to deliver the highest standard of care for some of the region’s most complex cases.

Prior to joining Cleveland Clinic Abu Dhabi, Dr. Guzman was Cleveland Clinic’s VP of Regional Hospital Medical Operations. Committed to innovation, he oversaw the development of the ICU telemedicine program (eHospital) at Cleveland Clinic and holds two patents registered with the US Patent and Trademark Office.

A fellow of the American College of Critical Care, Dr. Guzman received his medical degree in 1988 from the Universidad Nacional de Córdoba, in Córdoba, Argentina. After completing his residency in internal medicine and a fellowship in critical care medicine at Hospital Privado de Comunidad, Mar del Plata, Argentina, he completed an additional fellowship in Critical Care Medicine at Wayne State University in Detroit, Michigan. Additionally, he completed a Healthcare MBA at Ballwin Wallace University in Ohio. He was appointed to Cleveland Clinic’s medical staff in 2007 and has authored or co-authored more than 50 scientific papers in peered-reviewed medical journals.

Nizar Zein, MD, Chief of Staff

Nizar Zein, MD is the Chief of Staff of Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. In his role, he leads more than 400 physicians across 16 institutes, supporting their wellbeing and the continuous improvement of the care they offer patients.

Dr. Zein is passionate about quality, empathy and compassionate care as well as the education of those who serve. Before his appointment as Chief of Staff, he was Chairman and Medical Director of Global Patient Services at Cleveland Clinic, leading a multidisciplinary and multinational team of caregivers that ensured all international patients receive high quality, seamless care.

Dr. Zein’s research interests focus on improving disease and treatment outcomes in patients with Hepatitis C before and after liver transplantation. He has authored over 200 publications, and has been the Principal Investigator of several large clinical trials. He holds several patents and established a research group at Cleveland Clinic focused on the 3D printing of solid organs. Elected to Cleveland Clinic’s Board of Governors in 2015, he has sat on Cleveland Clinic’s Board of Directors as a representative of the Board of Governors since 2017. Dr. Zein received several awards, including the American Liver Foundation Scholar Award, the Cleveland Clinic Innovator Award and the Distinguished Faculty Award for Research Mentorship. He was recognized as ‘Teacher of the Year’ by the Cleveland Clinic Lerner College of Medicine Teacher for his commitment to the education and mentorship of young physicians.

Mumtaz Khan, MD, MBA, Chief Medical Officer

Mumtaz Jamshed Khan, MD, MBA is the Chief Medical Officer and Department Chair of Otolaryngology in the Surgical Subspecialties Institute at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. In his role as Chief Medical Officer, Dr. Khan oversees inpatient, outpatient and surgical operations. Prior to joining Cleveland Clinic Abu Dhabi, Dr. Khan was a Professor and Director of Head and Neck Surgery at Aga Khan University.

Dr. Khan received his medical degree from Aga Khan University. After completing his residency at Henry Ford Hospital in Detroit, he pursued fellowship training in Head and Neck Surgical Oncology, Skull Base and Microvascular Reconstructive Surgery from Vanderbilt University. He has held a range of administrative positions in addition to his clinical work throughout his career and holds an Executive MBA in Healthcare Management from Brandeis University, Boston, Massachusetts.

Marc Petre, Chief Operator Officer

Marc Petre is Chief Operating Officer at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. As part of the leadership team at Cleveland Clinic Abu Dhabi, Marc oversees numerous key departments, including facilities, construction, safety, regulatory compliance, emergency management, protective services, parking, environmental services, laundry, food service, supply chain management, and patient hospitality.

Prior to joining Cleveland Clinic Abu Dhabi, Marc served as Cleveland Clinic’s Executive Director for Clinical Engineering since February 2011, managing the daily and strategic activities for Clinical Engineering across the enterprises’ 18 hospitals and associated outpatient centers. Marc worked through Cleveland Clinic Innovations to commercialize several technical solutions developed at the bedside, including a platform for telemedicine which was deployed across Cleveland Clinic’s US facilities. Additionally, he supported the Cleveland Clinic’s international activities in London and Canada, and has significant expertise in High Level Disinfection compliance and safety across health systems.

During his tenure at Cleveland Clinic, Marc was recognized as an experienced leader, an inventor of patented solutions, an innovator, an educator, and a highly-skilled professional in the logistics, strategy, and community aspects of healthcare. Marc earned his Bachelor of Science in Materials Science and Engineering from the University of Cincinnati before receiving his Master of Science and Doctor of Philosophy degrees in Biomedical Engineering from Case Western Reserve University. He is a member of the Biomedical Engineering Society and the Association for the Advancement of Medical Instrumentation.

Sue Behrens, Chief Nursing Officer

Sue Behrens is the Chief Nursing Officer at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health, overseeing nursing services and patient care.

Sue has been working in a variety of leadership roles at Cleveland Clinic Abu Dhabi since 2014, most recently serving as Interim Chief Nursing Officer.

Prior to joining Cleveland Clinic Abu Dhabi, Sue spent more than 25 years working at OSF St Francis Medical Center, an academic medical center in the US, ultimately overseeing Emergency Medicine and Advanced Practice.

Sue is a Fellow of the Executive Fellowship in Innovation Health Leadership, and holds a clinical Doctor of Nursing Practice. Sue maintains her APN license and board certification in adult health, as well as board certification as an Advanced Nurse Executive.

Michael Makarem, General Counsel

Michael Makarem is the General Counsel at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health, where he oversees the hospital’s legal, regulatory and governance matters. He is also the General Counsel of Corporate Services at Mubadala and the General Counsel of Mubadala Health.

Since joining Mubadala in 2010, he has held various roles, including at Yahsat and as General Counsel of MDC Business Management Services. He is a California-licensed attorney with over 16 years of experience in complex transactions, litigation and corporate governance.

Before joining Mubadala, Michael was the Legal Counsel for OSN in Bahrain and, prior to that, was an attorney with AlvaradoSmith APC in the US. Michael holds a bachelor’s degree from Arizona State University and a Juris Doctor degree from the University of San Diego School of Law. He is admitted to practice in the State and Federal District Courts in California.

E. Murat Tuzcu, MD, Chief Academic Officer and Chair of the Heart and Vascular Institute

E. Murat Tuzcu, MD, is Professor of Medicine at Cleveland Clinic Lerner College of Medicine, Case Western University serves as Chief Academic Officer and Chair of the Heart and Vascular Institute at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. In this role, Dr. Tuzcu focuses on the development and implementation of an innovative, creative and state-of-the art research and education strategic plan, and on fostering proactive and collaborative relationships with local, regional, and international stakeholders.

Prior to joining Cleveland Clinic Abu Dhabi, Dr. Tuzcu served as Vice Chairman of the Department of Cardiovascular Medicine and as Staff Interventional Cardiologist in the Heart & Vascular Institute at Cleveland Clinic in the United States. He has a large clinical practice with patients from all parts of the world.

With more than 40 years of clinical experience, Dr. Tuzcu has held several academic appointments. He has co-authored more than 400 peer-reviewed publications. In 2015, Dr. Tuzcu was named by Thomson Reuters as one of the most highly-cited researchers (Top 1%) in the world for the last decade. He serves on the editorial board of a number of leading cardiovascular scientific journals. He is the associate editor of the leading journal of interventional cardiology, Journal of American College of Cardiology Cardiovascular Interventions

Dr. Tuzcu is a committed educator, devoting a substantial portion of his time to intramural and extramural education activities. He has organized many courses, conferences and lectured all around the world. He was the chair of 2007 Annual Scientific Sessions of American College of Cardiology. Professor Tuzcu is recipient of numerous awards and honors.

Dr. Tuzcu received his medical degree from Istanbul Medical Faculty in Istanbul, Turkey, where he also completed his internship and residency in Internal Medicine. In addition, Dr. Tuzcu also completed his fellowships at Cleveland Clinic in the United States in Cardiovascular Disease and Interventional Cardiology. He also completed a special fellowship for valvular interventions at Massachusetts General Hospital, Harvard Medical School.

Glenn Zirbser, Chief Financial Officer

Glenn Zirbser is the Chief Financial Officer at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. In this role, he is responsible for the commercial oversight of the institution, ensuring its efficiency and growth through robust resource management principles and sound corporate governance policies.

Glenn brings more than 27 years of expertise to his role at Cleveland Clinic Abu Dhabi, having held a range of senior positions in operations, consulting, and management. He has a demonstrated track record in growing clinical service lines through strategic investment and enhanced patient access.

Previously, Glenn served as Senior Vice President and Regional Chief Financial Officer at Jefferson Health, a regional academic health system composed of 11 hospitals and multi-specialty physician enterprises. He has also held similar roles at Princeton HealthCare System and Inova Health System.

Bryan Lord, Chief Information Officer

Bryan Lord is the Chief Information Officer at Cleveland Clinic Abu Dhabi, an integral part of Mubadala Health. In his role, Bryan manages the hospital’s IT infrastructure, enabling it to take advantage of the latest innovations in the health technology domain.

Bryan has more than 15 years of experience in the healthcare sector. He has been with Cleveland Clinic Abu Dhabi since 2010. Prior to that, Bryan served as Development Manager at Providence Health & Services in Portland, in the United States.

Bryan holds a Master of Business Administration degree (MBA) from the University of Phoenix, Portland, USA, and a Bachelor of Science degree in Information Systems from Portland State University, USA.

Treatment Quality & Safety

Our Awards & Accreditations

Explore Our Institutes & Specialties