Kimberly D. Russo

Chief Executive Officer


Kimberly Russo, MS, was appointed Chief Executive Officer (CEO) of the George Washington University ӮƱ in May 2016.

Before being named CEO, Ms. Russo served as Chief Operating Officer for the hospital since April 2009.  Prior to that, she was Associate Administrator at the hospital since August 2006, and was previously Executive Director of Rehabilitation Services. She holds an MBA from the University of Nebraska-Lincoln, through a collaborative leadership program with Gallup, a Master of Science in Speech-Language Pathology from Rush University in Chicago, and a Bachelor of Science in Speech Language Pathology and Audiology from Illinois State University.
Ms. Russo is a healthcare executive with 20 years of clinical and operational experience, and has a proven track record of exceptional results. She was recognized as one of a list of business leaders who made an impact on the DC area in 2016. The Washington Business Journal also named her an honoree of "Women Who Mean Business" in 2010. In addition, in 2010, she was recognized as an “Up and Comer Under 40” by Modern Healthcare and Becker's ӮƱ Review.

Nicole Dollison

Chief Operating Officer

Nicole Dollison, COO

Nicole Dollison was named Chief Operating Officer (COO) at the George Washington University ӮƱ in January 2017. Prior to joining GW ӮƱ, Dollison served as COO at Manatee Memorial ӮƱ in Florida. In that role, she led the acquisition of a diagnostic center; assisted with the development of one of the largest structural heart programs in Florida; developed a comprehensive breast program; created an observation unit; and contributed to a successful application for chest pain accreditation, stroke accreditation and CAP certification.

Prior to joining Manatee Memorial ӮƱ, Dollison served as the Vice President of Operations at Alegent Creighton Health, an 11-hospital health system with 2,000 licensed beds in two states. Her more than 20 years of healthcare leadership experience also includes roles overseeing departments of surgery and medicine, as well as serving as an Executive Director for Beverly Healthcare, an organization operating 400 nursing facilities, assisted living centers and hospice.

She is a member of the American College of Health Care Executives and holds a Master of Public Health Administration from the University of Nebraska-Omaha.

George Sprinkel

Chief Financial Officer


George Sprinkel joined the George Washington University ӮƱ as the Chief Financial Officer (CFO) in October 2015.

Sprinkel has more than 15 years of hospital CFO experience. Prior to joining GW ӮƱ, he was the CFO at Gateway Medical Center in Tennessee, a 270-bed acute care hospital. In addition, he has held CFO positions at several other hospitals, including Baptist Health Care in Florida, Mercy Regional Medical Center in Colorado, and New Hanover Health Network in North Carolina.

Sprinkel is a member of the American College of Healthcare Executives. He also previously served as a board member of Medicaid Access III of North Carolina and as a Chairman for the Coastal Carolina Health Alliance Finance Committee. He holds a Master of Business Administration and a Bachelor of Science in Finance from the University of North Carolina at Wilmington.

Bruno Petinaux

Chief Medical Officer


Bruno Petinaux, MD, was appointed Chief Medical Officer (CMO) at the George Washington University ӮƱ in June 2017. Prior to his official appointment, he served as Interim CMO for a year, during which he led the development and execution of many safety and quality initiatives.

In addition to his role as CMO, Dr. Petinaux is an associate professor in the Department of Emergency Medicine at the GW School of Medicine and Health Sciences and has been an emergency medicine physician at GW ӮƱ since 2002. He co-chairs GW ӮƱ’s Emergency Management Program and is the Emergency Management Track Director for the GW School of Medicine and Health Sciences. Along with his work at GW, Dr. Petinaux supports our community as a medical team manager for the Virginia Task Force 1/USA 1 Urban Search and Rescue Team.

Dr. Petinaux completed his emergency medicine residency at GW ӮƱ where he finished as chief resident. Along with his medical degree from the Sidney Kimmel Medical College from the Thomas Jefferson University in Philadelphia, Dr. Petinaux has a military background with the United States Army Reserve.

Scott Croonquist

Chief Nursing Officer

Scott Croonquist

Scott Croonquist, DNP, RN, NEA-BC, joined The George Washington University ӮƱ as Chief Nursing Officer in January 2020.

Earlier in his career, Croonquist was the Magnet Recognition Program Appraiser for the American Nurses Credentialing Center in Washington, DC; Associate Chief Nursing Officer and Administrator of Adult Patient Care Services for the University of Virginia Health System in Charlottesville, Virginia.; Director of Patient Care Services/Cardiac Service, Critical Care Nursing for New York-Presbyterian ӮƱ in New York; and Administrative Director of Nursing for Hackensack University Medical Center in Hackensack, New Jersey. 

Croonquist earned his Doctorate of Nursing Practice in Executive Leadership from the American Sentinel University in Aurora, Colorado, as well as a Master of Science in Nursing Administration/Case Management from Saint Peter’s College in Englewood Cliffs, New Jersey. He received his Bachelor of Science in Nursing from Ramapo College/University of Medicine and Dentistry of New Jersey in Mahwah, New Jersey.

Hazel Darisse

Assistant Chief Nursing Officer

Hazel Darisse

Hazel Darisse was appointed Assistant Chief Nursing Officer at the George Washington University ӮƱ in May 2018.

Darisse has been in nursing at GW ӮƱ since 1990 and spent almost 10 years as Divisional Director of Surgical Services. Prior to that position, she performed a number of nursing roles including time as Operating Room Manager and Cardiac Surgery Coordinator.

With decades of nursing experience at GW, Darisse has been integral to a number of initiatives. As part of the OR leadership team, she helped launch the Thoracic Robotic program in 2004. In addition, she worked with the GWU School of Nursing to develop the Perioperative 101 curriculum to increase recruitment and interest in this field of nursing that has the highest shortage nationwide.

Darisse holds a Doctorate of Nursing Practice and a Master of Science in Nursing from The George Washington University. She received her undergraduate nursing degree from Marymount University. She is a Nursing Honors Society member of Sigma Theta Tau International and was a founding member of the Phi Epsilon chapter.

Elliott Brown

Assistant Administrator

Elliott Brown

Elliott Brown has been an Assistant Administrator at the George Washington University ӮƱ since January 2018.

Brown came to GW ӮƱ with more than seven years of experience in both for-profit and not-for-profit health systems. Prior to joining GW ӮƱ, he most recently served as the Director of Clinical Operations at MedStar Heart and Vascular Institute at MedStar Washington ӮƱ Center. Other previous roles that he has performed include Regional Director of Business Operations, Business Operations Manager, and Cleveland Clinic Alliance Manager.

Brown is a member of the American College of Healthcare Executives. He holds a Master of Science in Health Services Administration from the Georgetown University School of Nursing and Health Sciences and a Bachelor of Business Administration from the George Washington University.