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Program Leadership


Assistant Chiefs of Service (ACS)

  • Bryan Broderick, MD, Barker Firm

    Bryan grew up in West Keansburg, New Jersey. He attended Caldwell University for his undergraduate education, where he starred on the soccer field for four years. He received his medical degree from Rutgers New Jersey Medical School. He chose the Osler Program for the Firm System, the personalized learning experience, and the opportunity to become an outstanding clinician and leader while caring for some of the most disadvantaged and vulnerable patients. Bryan pursued a Master of Education in Health Professions (MEHP) degree and completed his first year of pulmonary and critical care fellowship training at Hopkins before returning for ACS year. Outside of the hospital, he likes to play soccer, watch his beloved New Jersey Devils, and spend time with his wife Mais, daughter Zara, and dog Tommy Boy.

    Bryan Broderick
  • Alexandra Horne, MD, Longcope Firm

    Alex is originally from Dallas, Texas and attended medical school at the Duke University School of Medicine before joining the Osler Medical Residency at Johns Hopkins. Alex was particularly drawn to the Osler Program due to its unique teaching environment fostered by the firm system and the dedication of housestaff and faculty to excellence in patient care. Following residency, she completed her clinical year of Pulmonary and Critical Care Medicine fellowship also at Johns Hopkins. Alex is passionate about medical education and feels honored to be able to return to the residency to teach the Osler housestaff. Outside of the hospital, Alex loves spending time with her husband, reading, and traveling the world.

    Alexandra Horne
  • Tijana Tuhy, MD, Janeway Firm

    Tijana Tuhy was born in Manhattan and raised there for 10 years before moving out west to Portland, Oregon. She attended the University of Arizona for her undergrad and the University of Arizona College of Medicine, Phoenix for medical school--suffice to say, she is a proud Wildcat. She chose the Osler Residency Program for the excellence of clinical training and values the emphasis the program places on developing residents into leaders early in their training. She thinks the patient care and teaching on the Osler Medical Service are second to none. Before becoming the Assistant Chief of Service for the Janeway Firm, she completed one year of Pulmonary/Critical Care Fellowship at Johns Hopkins and will be returning to finish her training after this year. Outside the hospital, she enjoys hiking and camping with her husband and their dog.

    Tijana Tuhy
  • John Wells, MD, Thayer Firm

    John was born in Atlanta, GA and spent some very early years in London, England before his parents moved their family of six home to Columbia, SC. His education took him to Chattanooga, TN and McCallie School for high school, Lexington, VA and Washington and Lee University for college, and Atlanta, GA for medical school at Emory University. Most recently he has been a cardiology fellow at Vanderbilt University in Nashville, TN. John feels fortunate to be part of the Osler program at Johns Hopkins Hospital and believes it is one of the treasures of American medicine. When not on the wards, John enjoys spending time with his wife, Margaret and infant son, John John. His dog, Barney, is pretty great, too. Look for them in the county on the NCR Trail, or in the city at Thames Street Oyster House. John is astounded and amazed to be called a follower of Christ, and he invites you to join him for a Bible study some time or a worship service at Church of the Resurrection in Lutherville, MD.

    John Wells

Associate Program Directors and Firm Faculty Leaders

Education Leaders



Administrative Staff

Jenn Jackson
Program Administrator

Ashley Hartley
Program Administrator

2021 Assistant Chiefs of Service with Drs. Sanjay Desai and Mark Anderson
2021-2022 Assistant Chiefs of Service with Drs. Sanjay Desai and Mark Anderson
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