Reinventing healthcare one patient at a time
Leslyn E. Williamson, DNP, MSN, MPH, RN, NEA-BC
Chief Operating Officer / Chief Nursing Officer

Ellis Medicine Dr. Leslyn E. Williamson has more than 25 years of diversified health care experience. She came to Ellis Medicine from Mount Sinai Brooklyn, where she served as Vice President of Patient Care Services. In this role, Dr. Williamson focused on leadership development and staff development, improving quality and patient experience outcomes, and transforming the work environment through staff engagement.

She has also served as the Director of Patient Care Services at Mount Sinai Beth Israel in Manhattan; Director of Inpatient Services at Northern Westchester Hospital in Mount Kisco, New York; and held a variety of positions at Montefiore Medical Center in the New York metro area between 2003 and 2013.

Dr. Williamson earned her DNP from Rutgers University, her MSN from Mercy College, and an MPH from New York Medical College. She is certified as a Nurse Executive, Advanced through the American Nurse Credentialing Center. She is a member of Sigma Theta Tau International Honor Society of Nursing, the New York Organization of Nurse Executives, and the Nursing Advisory Board at Mercy College.

Management Team

Paul A.Milton
Paul A. Milton
President / Chief Executive Officer
Leslyn E.Williamson, DNP, MSN, MPH, RN, NEA-BC
Leslyn E. Williamson, DNP, MSN, MPH, RN, NEA-BC
Chief Operating Officer / Chief Nursing Officer
Jennie Gliha
Vice President, Chief Human Resources Officer
Marc Mesick
Vice President/Chief Financial Officer
AvinashBachwani, MD
Avinash Bachwani, MD
Vice President, Chief Medical Information Officer & Chief Physician Executive
David M.Liebers, M.D.
David M. Liebers, M.D.
Vice President, Chief Medical Officer
Marcia (Marcy)Steiner
Marcia (Marcy) Steiner
Vice President/Executive Director, The Foundation for Ellis Medicine