Jonathan M. Ellen, M.D.
President, CEO and Physician-in-Chief, JHACH
Vice Dean and Professor of Pediatrics, JHUSOM

Dr. Jonathan Ellen serves as president, CEO and physician-in-chief of Johns Hopkins All Children’s Hospital (JHACH) and vice dean and professor of pediatrics with Johns Hopkins University School of Medicine. With a team from both organizations, he led the integration between Johns Hopkins Medicine and All Children’s Hospital to ultimately transform All Children’s from a regional pediatric referral center to a leading pediatric academic health system focused on research, teaching and patient care.  Read more >>


Roberta Alessi, M.H.S.A.
Executive Vice President and Chief Operating Officer

Roberta Alessi serves as executive vice president and chief operating officer for Johns Hopkins All Children’s Hospital. She provides leadership and oversight of clinical and support services, facilities (including the regional network of Johns Hopkins All Children's Outpatient Care locations), pharmacy and home health along with a broad range of transformational initiatives. Read more >>


Sylvia Ameen
Vice President, Marketing, Communications and Culture, CFRE

Sylvia Ameen serves as vice president, marketing, communications and culture for Johns Hopkins All Children’s Hospital. In her role, Ameen is responsible for the oversight of all marketing and communications operations at the hospital, including internal hospital communications to employees and physicians as well as external marketing strategy. Her purview includes all marketing strategies, media relations, creative development, crisis communications, internal and external communications, hospital events, brand use, culture and employee engagement. Read more >>


Kimberly Berfield
Vice President, Government and Community Affairs

Kimberly Berfield joined Johns Hopkins All Children’s Hospital as vice president, government and community affairs, in February 2017. A veteran expert in collaborative strategies in all aspects of government affairs, public policy and community initiatives, she is helping Johns Hopkins All Children’s fulfill its mission of providing child health through treatment, education, advocacy and research to children locally and beyond. Berfield leads mission-based community initiatives at Johns Hopkins All Children’s Hospital, including Safe Kids, Healthy Start and Fit4Allkids program. Read more >>


Paul Colombani, M.D., M.B.A., F.A.C.S., F.A.A.P.
President, All Children's Specialty Physicians

Dr. Colombani chairs the Department of Surgery at Johns Hopkins All Children's Hospital and is guiding the growth of clinical research, education and expertise in multiple pediatric surgical subspecialties. He is a Professor of Surgery, Pediatrics and Oncology at the Johns Hopkins University School of Medicine and the Robert Garrett Professor (Emeritus) of Pediatric Surgery. Read more >>


Jackie Crain, J.D., M.B.A.
Vice President, Chief Strategy Officer, Chief of Staff

Jackie Crain, J.D., M.B.A., serves as the vice president, chief strategy officer and chief of staff at Johns Hopkins All Children's Hospital. In this role she leads strategic business services, including strategic planning and business development initiatives for Johns Hopkins All Children’s Hospital and the Johns Hopkins All Children’s Health System entities, along with clinical and academic affiliations. Read more >>


Marcos DeLeon 
Vice President, Human Resources

Marcos DeLeon joined Johns Hopkins All Children’s Hospital in June 2015 as vice president, human resources. He is guiding leadership development, employee engagement and other key human resources initiatives for the more than 3,000 employees based at Johns Hopkins All Children’s main campus in St. Petersburg and its outpatient locations in eight Florida counties. Read more >>


Neil Goldenberg, M.D., Ph.D.
Director of Research and Chief Research Officer

Dr. Goldenberg was named director of research at Johns Hopkins All Children’s Hospital in July 2012 as well as chief research officer of the Johns Hopkins All Children’s Research Institute and director of the new Clinical and Translational Research Organization at Johns Hopkins All Children’s Hospital. He is a professor of pediatrics and medicine at the Johns Hopkins University School of Medicine. Read more >>


Derek Hess, M.D.
Chief of Staff

Dr. Hess, a pediatric ophthalmologist, became chief of the medical staff in January 2017 after a one-year term as vice chief. Dr. Hess also chaired the medical staff’s Medical Care Evaluation Committee in 2016. He joined the Johns Hopkins All Children’s Hospital medical staff in 2004.  Read more >>


Melissa Macogay, M.B.A., B.S.N., R.N., N.E.-B.C., C.C.R.N.-K.
Vice President and Chief Nursing Officer

Melissa Macogay, MBA, BSN, RN, CCRN-K, NE-BC is vice president and chief nursing officer for Johns Hopkins All Children’s Hospital.

A registered nurse for more than 19 years, Macogay started as a nurse in the pediatric intensive care unit (PICU) at The Johns Hopkins Hospital in Baltimore, Maryland. She joined Johns Hopkins All Children’s in 2008 and served in multiple roles including interim chief nursing officer, director of the PICU, surgical neuroscience unit and dialysis as well as senior director of nursing for the Institute for Brain Protection Sciences. Read more >>


John McLendon
Vice President, Chief Information Officer

John McLendon joined John Hopkins All Children’s Hospital in July 2016 as vice president and chief information officer. He is responsible for oversight of all Information Technology (IT) services across Johns Hopkins All Children’s providing leadership and IT support of the clinical, research, academic and administrative functions of the enterprise. In this role, he is responsible for implementing the IT strategic plan, enhancing clinical network integration, and deploying an enterprise data warehouse to support the organization’s health informatics, analytics and population health initiatives, and optimizing the electronic health record (EHR) to help ensure the highest quality, safest care is delivered to all patients. Read more >>


Brigitta Mueller, M.D., M. H.C. M., F.A.A.P.
Vice President, Medical Affairs and Chief Patient Safety Officer

Dr. Brigitta Mueller joined Johns Hopkins All Children’s Hospital in September 2013 as vice president for medical affairs and chief patient safety officer. She works closely with other hospital leaders, physicians and staff on a wide range of quality and patient safety initiatives and oversight. Dr. Mueller is a professor of pediatrics (PAR) in hematology at the Johns Hopkins University School of Medicine. She also serves as interim director of the Johns Hopkins All Children's Cancer & Blood Disorders Institute. Read more >>


Anthony (Tony) Napolitano, M.D., F.A.A.P.
Chair, Department of Pediatric Medicine

Dr. Napolitano chairs the Department of Pediatric Medicine at Johns Hopkins All Children’s Hospital. He joined the Johns Hopkins All Children’s neonatology program in 1988 and serves as senior neonatologist. Read more >>


Sylvia R. Powell, M.B.A.
Associate Dean of Administration
Office of the Vice Dean, Johns Hopkins All Children’s Hospital

Sylvia Powell joined The Johns Hopkins University School of Medicine in July 2011 as assistant dean of administration in the Office of the Vice Dean for Johns Hopkins All Children’s Hospital. Drawing upon more than 35 years of administrative experience in academic medicine, she is helping to lead the academic transformation of Johns Hopkins All Children’s Hospital. Read more >>


Steven Pozefsky
Senior Counsel

Steve Pozefsky serves as Senior Counsel for Johns Hopkins All Children’s Hospital. A member of the leadership team, Pozefsky provides legal counsel for the hospital, oversees the privacy and accreditation divisions, and manages contract work in support of the hospital’s treatment and academic mission. Joining the team in September 2017 from the Washington, D.C., area, Pozefsky brings more than 20 years of legal experience to Johns Hopkins All Children’s. Read more >>


Jenine Rabin
Executive Vice President, Johns Hopkins All Children's Foundation 

As executive vice president of the Johns Hopkins All Children's Foundation, Ms. Rabin plays a key role in defining the hospital's funding needs and then shaping the philanthropic opportunities that invite donors to become involved through their gifts of time, talent and treasure. She is responsible for all fundraising activities and personnel, directing a team of passionate and talented individuals. Read more >>


Chris Whitby
Vice President, Chief Financial Officer

Christopher Whitby is vice president, chief financial officer at Johns Hopkins All Children's Hospital. He joined the hospital staff as senior director of finance in April 2016. In his role, Whitby supports the hospital mission by strategically leading and overseeing the financial areas of the non-profit health system, including financial reporting, revenue cycle, managed care, decision support, reimbursement, treasury, taxation, budgeting and forecasting.  Read more >>