George Jallo, M.D.
Vice Dean at Johns Hopkins All Children’s Hospital
Dr. Jallo is the vice dean and physician-in-chief at Johns Hopkins All Children's Hospital. He also is the David M. Goldenberg Family Endowed Chair in the Institute for Brain Protection Sciences and a professor of neurosurgery, pediatrics and oncology with Johns Hopkins University School of Medicine.
Dr. Jallo joined Johns Hopkins in 2003 as a pediatric neurosurgeon. In 2013, he became the pediatric neurosurgery division director at The Johns Hopkins Hospital in Baltimore. He was Neurosurgery residency program director from 2007 to 2013. Jallo moved to Johns Hopkins All Children's in 2015 to launch the Institute for Brain Protection Sciences, a multidisciplinary institute that unites clinicians, researchers and educators focused on promoting optimal neurodevelopment and caring for children with injuries and illnesses that can affect the brain. Dr. Jallo has published more than 300 peer-reviewed scientific articles, 100 book chapters and is co-editor of seven textbooks on pediatric neurosurgery.
Dr. Jallo earned his medical degree at the University of Virginia Medical School and completed his residency in neurosurgery at New York University Medical Center and fellowship in pediatric neurosurgery at Beth Israel Medical Center, Institute for Neurology and Neurosurgery, in New York.
Associate Deans
Paul Danielson, M.D.
Associate Dean of Clinical Affairs
Dr. Danielson is associate dean of clinical affairs at Johns Hopkins All Children’s Hospital. Dr. Danielson also began serving as president of All Children’s Specialty Physicians (ACSP) in 2023, first on an interim basis and then permanently. A clinical professor of surgery, he has chaired the Johns Hopkins All Children's Department of Surgery since 2020 and was interim chair from 2018 to 2020. He specializes in general surgery and was an early adopter of minimally invasive surgical techniques, developing expertise in treating chest wall deformities.
Dr. Danielson founded the first fellowship sponsored by Johns Hopkins All Children’s Hospital in pediatric surgery and was also instrumental in bringing the National Quality Improvement in Surgery Program to the institution. He was named Johns Hopkins All Children’s Hospital physician of the year in the 2015 Johns Hopkins Medicine Clinical Awards. He joined the hospital staff in 2008.
He retired as a colonel from the U.S. Army Reserve in 2017 after serving in both Iraq and Afghanistan.
Dr. Danielson earned his medical degree from the University of Rochester where he also completed the residency program in general surgery through Strong Memorial Hospital. He completed a research fellowship in pediatric surgery at Massachusetts General Hospital/Harvard University and a clinical fellowship in pediatric surgery at Children’s Hospital Los Angeles. Before joining Johns Hopkins All Children’s, he served as director of pediatric surgical oncology at the University of Massachusetts.
Lisa DeBerry, M.N.M.
Associate Dean for Administration
Lisa DeBerry joined Johns Hopkins University School of Medicine at Johns Hopkins All Children’s Hospital as associate dean for academic administration in 2021. She is focused on the continued development of the research and education programs for the hospital’s institutes and departments in support of learning, inquiry and clinical excellence. She oversees academic affiliations, the strategic growth and recruitment of Johns Hopkins Medicine faculty at Johns Hopkins All Children's Hospital, and the Center for Medical Simulation and Innovative Education. She is the chief of research administration for the All Children’s Research Institute (ACRI) and leads several research cores and service centers to support the research mission on the Johns Hopkins All Children's Hospital campus.
Neil Goldenberg, M.D., Ph.D.
Associate Dean for Research
Dr. Goldenberg is the associate dean for research and director of the Johns Hopkins All Children's Institute for Clinical and Translational Research. He is the Perry Family Endowed Professor in Clinical and Translational Research and a professor of pediatrics and medicine at the Johns Hopkins University School of Medicine. Dr. Goldenberg also serves as chief research officer for All Children’s Research Institute. He is a senior advisor to the Thrombosis Program in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute and co-directs the Stroke Program in the Johns Hopkins All Children’s Institute for Brain Protection Sciences. Dr. Goldenberg is an international leader in the field of venous thromboembolism in children and young adults.
Dr. Goldenberg is the principal investigator for the National Institutes of Health-sponsored Kids-DOTT trial. He also serves as principal investigator for two grant-funded prospective cohort and bio banking studies at Hopkins that strongly align with institutional research priorities for pediatric research: the Institution-wide Prospective Inception Cohort Study of Individuals with Childhood-Onset Acute and Chronic Health Conditions (iPICS) and the Prospective Research on Early Determinants of Illness and Children's Health Trajectories (PREDICT)—the latter in partnership with Baltimore-based Johns Hopkins University faculty colleague Sara Johnson, Ph.D., who serves as principal investigator on an NIH grant for the study.
Dr. Goldenberg serves as a member of steering committees and data and safety monitoring committees for several NIH- and pharmaceutical industry-sponsored multicenter clinical trials and has co-authored numerous international clinical and clinical research guidelines in pediatric thrombosis and stroke. He is also the chair of the Pediatric Scientific and Standardization Committee of the International Society on Thrombosis and Haemostasis.
Dr. Goldenberg earned his medical degree from McGill University Faculty of Medicine in Montreal, Quebec. He completed a pediatric residency from the University of South Florida in Tampa, Florida, followed by a fellowship in hematology/oncology from the University of Colorado in Denver. Dr. Goldenberg holds a Ph.D. in Clinical Investigation from the University of Colorado.
Before joining Johns Hopkins All Children’s, Dr. Goldenberg was on the faculty of the University of Colorado School of Medicine and served as director of the Children's Clinical Research Organization and co-director of the pediatric thrombosis and stroke programs at Children's Hospital Colorado. He also directed the Department of Clinical Science and Safety at CPC Clinical Research, a university-affiliated Academic Research Organization that runs NIH- and pharma-sponsored clinical trials.
Dr. Goldenberg has authored more than 225 original research reports, review articles and book chapters, mostly as first or senior author. He is also the co-editor of a definitive textbook from Cambridge University Press on pediatric thrombotic disorders.
Timothy Osborne, Ph.D.
Associate Dean for Basic Research
Dr. Osborne is associate dean for Basic Research and director of the Johns Hopkins All Children's Institute for Fundamental Biomedical Research. He is a professor of medicine in the Division of Endocrinology, Diabetes and Metabolism of the Johns Hopkins University School of Medicine, based on the St. Petersburg, Florida, campus. He joined the faculty in 2018.
The institute focuses on basic science and supports and collaborates with researchers in other institutes, departments and centers throughout Johns Hopkins Medicine. Dr. Osborne studies the regulation of cholesterol and fatty-acid metabolism and how that impacts physiology and cell biology with a focus on Sterol Regulatory Element Binding Proteins (SREBPs). His research suggests SREBPs are key to understanding cell-environment interactions such as nutrient sensing and responses to organic and biological threats. Dr. Osborne also is part of a National Institutes of Health-funded study into why some people gain fat in the abdomen and others in the thigh area and what impact that has on their cardiovascular health.
Born in Ouray, Colorado, Dr. Osborne studied fundamental biochemistry and molecular biology at the University of California, Santa Barbara and then earned his Ph.D. in microbiology and molecular biology at UCLA. He did a post-doctoral fellowship at the University of Texas Southwestern Medical Center and then became an assistant professor there, working in the lab of Michael Brown and Joseph Goldstein, who won the 1985 Nobel Prize in Physiology or Medicine “for their discoveries concerning the regulation of cholesterol metabolism.” Dr. Osborne spent 20 years at UC Irvine, working his way up to full professor and chairman of the Department of Molecular Biology and Biochemistry. He then worked for the Sanford Burnham Prebys Medical Research Institute in Lake Nona, Florida, as a professor and program director and ultimately scientific director.
Institute and Department Directors
Cassandra Josephson, M.D.
Director, Johns Hopkins All Children’s Cancer & Blood Disorders Institute
Dr. Josephson is the Hawkins Family Endowed Professor and director of the Johns Hopkins All Children’s Cancer & Blood Disorders Institute in St. Petersburg, Florida. She is also a Professor in Oncology in the Johns Hopkins University School of Medicine. She joined the medical staff in 2022. Dr. Josephson, who specializes in blood banking/transfusion medicine and hematology-oncology, is recognized internationally as a leader in pediatric transfusion medicine and has made significant contributions to medical education, clinical knowledge, clinical/translational research and patient care. Previously, she worked as a Professor of Pathology/Laboratory Medicine and Pediatrics and was the director of Clinical Research and associated director of the Emory Center for Transfusion and Cellular Therapies at the Emory University School of Medicine and at Children’s Healthcare of Atlanta.
Tony Napolitano, M.D.
Chair, Department of Pediatric Medicine
Dr. Napolitano chairs the Department of Pediatric Medicine at Johns Hopkins All Children's Hospital. He joined the All Children's Hospital neonatology program in 1988 and serves as senior neonatologist.
Dr. Napolitano is the medical director of the LifeLine Critical Care Transport Team, which brings patients to Johns Hopkins All Children's Hospital. In 2009, he was also named medical director for the 32-bed Neonatal Intensive Care Unit at Sarasota Memorial Hospital through its affiliation with All Children's Specialty Physicians and Johns Hopkins All Children's Hospital. He is a member of the faculty of the Johns Hopkins All Children's Hospital pediatric residency program.
Michael Puchalski, M.D.
Co-Director, Johns Hopkins All Children’s Heart Institute
Dr. Puchalski is co-director of the Heart Institute and medical director of cardiology at Johns Hopkins All Children’s. He joined the hospital staff in 2020. He was previously associate director of the Division of Pediatric Cardiology in the Department of Pediatrics at the University of Utah in Salt Lake City. He also served as director of noninvasive imaging for cardiology after building the Fetal Heart Center and starting the cardiovascular MRI program. He was director of quality improvement for the Heart Center at Primary Children’s Hospital in Salt Lake City and medical director of outpatient services at Primary Children’s Medical Center in Riverton, Utah.
James Quintessenza, M.D.
Co-Director, Johns Hopkins All Children’s Heart Institute
Dr. Quintessenza is the co-director of the Heart Institute and chief of cardiovascular surgery at Johns Hopkins All Children’s Hospital. He originally joined the hospital staff in 1988, where he developed and refined complex neonatal heart surgery and led the congenital heart program for many years. He was one of the cardiothoracic surgeons who performed the hospital’s first pediatric heart transplant in 1995. He previously served as medical director of the Heart Institute from 2012-2015. Dr. Quintessenza returned to Johns Hopkins All Children’s in 2020 after three years as chief and professor of pediatric cardiothoracic surgery at Kentucky Children’s Hospital and the University of Kentucky in Lexington, and as professor of pediatric cardiothoracic surgery at Cincinnati Children’s Hospital Medical Center and the University of Cincinnati.
Mohammed Rehman, M.D.
Chair, Department of Anesthesia and Pain Medicine, Johns Hopkins All Children’s Hospital
Mohamed Rehman, M.D., is the Eric Kobren Endowed Professor in Applied Health Informatics and a Professor of Anesthesiology and Critical Care in the Johns Hopkins University School of Medicine. He is the chair of the Department of Anesthesia and Pain Medicine at Johns Hopkins All Children’s Hospital. Internationally recognized for his medical and clinical informatics expertise, Dr. Rehman also is director of Perioperative Health Informatics, leading a team that is involved in data-driven research to improve quality, safety and value. Dr. Rehman’s team is one of the few in the world working in real time consumer level and medical data to improve patient outcomes.
Linda Van Marter, M.D., M.P.H.
Director, Johns Hopkins All Children’s Maternal, Fetal & Neonatal Institute
Dr. Van Marter is the medical director of the Maternal, Fetal & Neonatal Institute and chief of Newborn Medicine at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2021. She also is a professor of Pediatrics in the Johns Hopkins University School of Medicine. Dr. Van Marter was most recently an associate professor of Pediatrics at Harvard Medical School and the associate chair for Academic Affairs in the Department of Pediatric Newborn Medicine at Brigham & Women’s Hospital.
Academic Directors
Bob Dudas, M.D.
Fellowship Director, Hospital Medicine
Director, Faculty Affairs
Dr. Dudas is chief academic hospitalist at Johns Hopkins All Children’s Hospital. He is an associate professor of pediatrics and associate director of general pediatrics and adolescent medicine in the Department of Pediatrics for the Johns Hopkins University School of Medicine. Dr. Dudas also serves as chair of general pediatrics, hospital and adolescent medicine at Johns Hopkins All Children’s Hospital and is program director of the Johns Hopkins All Children’s Hospital Pediatric Hospital Medicine Fellowship. He joined the hospital staff in 2015.
Jennifer Maniscalco, M.D., M.P.H., MACM
Designated Institutional Official
Director, Medical Education at Johns Hopkins All Children's Hospital
Dr. Maniscalco is the director of medical education at Johns Hopkins All Children's Hospital. She joined the faculty in 2018 and became the director in 2021. She is the Designated Institutional Official (DIO) and her academic work relates to clinical teaching, promoting trainee autonomy, and mentorship.
She is a former pediatric hospital medicine fellowship director and chaired the AAP Section on Hospital Medicine PHM Fellows Conference from 2015-2018. She was the 2017 recipient of the PHM Award for Educational Excellence. She completed her pediatric residency and pediatric hospital medicine fellowship at Children's National Medical Center in Washington, D.C.
Mary Beth Wroblewski, M.D.
Director, Johns Hopkins All Children’s Pediatric Residency Program
Dr. Wroblewski specializes in general pediatrics at Johns Hopkins All Children’s Hospital. She sees patients on the hospital’s main campus in St. Petersburg, Florida. She joined the hospital staff in 2023. Dr. Wroblewski also serves as the director of the Johns Hopkins All Children’s Pediatric Residency Program.
Academic Administrative Leadership Team
Sarah Stephens, M.H.A.
Sarah Stephens, senior administrative manager is responsible for the Johns Hopkins All Children's Office of Vice Dean’s Academic Systems Planning and Development. She works with the Associate Dean of Administration - Johns Hopkins All Children's Hospital and faculty leadership to support programmatic and infrastructure development, and financial and administrative management for Johns Hopkins All Children's basic science and translational-based research programs. She works with the Cancer & Blood Disorders Institute, Institute for Fundamental Biomedical Research and Institute for Clinical and Translational Research, and numerous research cores to enhance the academic integration with JHUSOM. She joined the Office of Vice Dean in 2013 and has held progressively increasing roles. She holds a Bachelor of Health Science from University of Florida, a Master of Health Administration from University of Florida and Lean Six Sigma Black Belt training from Villanova University. She is an active member of the Association of Academic Administrators in Pediatrics, National Council of Research Administrators, and sits on the Board of Directors for the University of Florida Alumni Association.
Mindy Slenn, MLHR, M.H.A.
Mindy Slenn, administrative manager, supports the Johns Hopkins All Children’s Office of Vice Dean’s academic systems planning and development. She works with the Associate Dean of Administration-Johns Hopkins All Children’s Hospital and faculty leadership to support program development, financial and administrative management primarily for clinical initiatives, including: Surgery, Anesthesiology, the Institute for Brain Protection Sciences, the Maternal, Fetal & Neonatal Institute, and the Heart Institute. She joined the Johns Hopkins AllChildren’s Office of Vice Dean in 2023 with over 15 years of experience in clinical operations and health care leadership. She holds a bachelor's degree in business administration, and master's degrees in labor and human resources and health administration from the Ohio State University.
Dana Widerman, M.H.A.
Dana Widerman, director, Financial Operations is responsible for the Johns Hopkins All Children’s Office of Vice Dean’s business operations (budget, payroll, financial reporting) and research administration activities. She works with the Associate Dean of Administration-Johns Hopkins All Children’s Hospital, faculty leadership, and other peers/directors to manage and be a steward of finance, grant and clinical trial contract activity and other Institute/Department program development. She joined the Office of Vice Dean in 2014, and previously held roles at Johns Hopkins University School of Medicine since 2010 in research administration. She holds a Bachelor of Science in Community Health Education from University of Maryland and a Master of Science in Health Administration from Towson University.
Margaret Dominguez
Margaret Dominguez, administrative manager, supports the Johns Hopkins All Children’s Office of the Vice Dean’s academic systems planning and development. She works with the Associate Dean of Administration-Johns Hopkins All Children’s Hospital and faculty leadership to support program development, financial and administrative management for the Department of Medicine, the Office of Medical Education, the Center for Medical Simulation and Innovative Education as we continue to advance the education mission. She joined the Johns Hopkins All Children’s Office of Vice Dean in August 2024 after spending two years in the Heart Institute at Johns Hopkins All Children’s Hospital. Prior to her career shift to health care, she has 10+ years of prior experiences working in higher education. She holds a Bachelor of Science in Psychology from the University of Illinois and a Master of Education in Curriculum and Instruction from the University of South Florida.