St. Joseph's Hospital and Medical Center - Executive Leadership Team
Douglas Ross, MD, FACEP
President of Dignity Health St. Joseph’s Hospital and Medical Center
Douglas Ross, MD, FACEP, is the president of Dignity Health St. Joseph’s Hospital and Medical Center. Before joining St. Joseph’s, Dr. Ross was the chief medical officer for CHI St. Vincent System and president of St. Vincent Hot Springs Hospital in Arkansas. Bringing with him a wealth of experience and knowledge, Dr. Ross has taken on several roles within Commonspirit Health, including vice president of medical affairs, medical director of emergency services, chief of staff and an emergency medical physician. He has received accolades such as Administrator of the Year by the Arkansas Hospital Administration and serves on the board of many community organizations.
Prior to beginning his professional career, Dr. Ross obtained both his Bachelor of Science in chemical engineering and his Doctor of Medicine from the University of Arkansas. He then went on to complete his residency in emergency medicine at the University of South Carolina in Columbia.
Douglas Ross, MD, FACEP
President of Dignity Health St. Joseph’s Hospital and Medical Center
Douglas Ross, MD, FACEP, is the president of Dignity Health St. Joseph’s Hospital and Medical Center. Before joining St. Joseph’s, Dr. Ross was the chief medical officer for CHI St. Vincent System and president of St. Vincent Hot Springs Hospital in Arkansas. Bringing with him a wealth of experience and knowledge, Dr. Ross has taken on several roles within Commonspirit Health, including vice president of medical affairs, medical director of emergency services, chief of staff and an emergency medical physician. He has received accolades such as Administrator of the Year by the Arkansas Hospital Administration and serves on the board of many community organizations.
Prior to beginning his professional career, Dr. Ross obtained both his Bachelor of Science in chemical engineering and his Doctor of Medicine from the University of Arkansas. He then went on to complete his residency in emergency medicine at the University of South Carolina in Columbia.
Chris St. Clair
Chief Operating Officer
Chris St. Clair is the chief operating officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen. He oversees hospital operations for several departments including environmental services, radiology, respiratory services, rehabilitation services, laboratory services, Huger Mercy Living Center, and facility planning and design. He also provides leadership for several hospital programs and organizational initiatives.
Since joining Dignity Health, Chris has built an integrative service line leadership team to oversee specialization care teams and sustainable patient care models within our hospitals. He also played a major role in developing an integrated rehabilitation service line that is ranked nationally by U.S. News and World Report.
Chris holds a degree in business administration-information systems from Iowa State University, a master’s of occupational therapy from St. Ambrose University, and a master’s of business administration-finance from Grand Canyon University.
Chris St. Clair
Chief Operating Officer
Chris St. Clair is the chief operating officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen. He oversees hospital operations for several departments including environmental services, radiology, respiratory services, rehabilitation services, laboratory services, Huger Mercy Living Center, and facility planning and design. He also provides leadership for several hospital programs and organizational initiatives.
Since joining Dignity Health, Chris has built an integrative service line leadership team to oversee specialization care teams and sustainable patient care models within our hospitals. He also played a major role in developing an integrated rehabilitation service line that is ranked nationally by U.S. News and World Report.
Chris holds a degree in business administration-information systems from Iowa State University, a master’s of occupational therapy from St. Ambrose University, and a master’s of business administration-finance from Grand Canyon University.
Timothy W.Jahn, MD, FACEP
Interim Chief Medical Officer
Timothy W. Jahm, MD, is the interim chief medical officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen. Dr.Jahn will oversee medical operations and ensure stability and continuity in our clinical services as we search for a new CMO.
Dr.Jahn is a senior physician executive with a wealth of experience across diverse healthcare settings, including military, not-for-profit, and faith-based organizations. He champions collaboration, clear communication, employee recognition, and continuous learning.
Dr.Jahn received his doctor of medicine degree from the University of Wisconsin-Madison. He also served as a US Navy Flight Surgeon.
Timothy W.Jahn, MD, FACEP
Interim Chief Medical Officer
Timothy W. Jahm, MD, is the interim chief medical officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen. Dr.Jahn will oversee medical operations and ensure stability and continuity in our clinical services as we search for a new CMO.
Dr.Jahn is a senior physician executive with a wealth of experience across diverse healthcare settings, including military, not-for-profit, and faith-based organizations. He champions collaboration, clear communication, employee recognition, and continuous learning.
Dr.Jahn received his doctor of medicine degree from the University of Wisconsin-Madison. He also served as a US Navy Flight Surgeon.
Tanya Osborne-McKenzie, DNP, MSN/MBA, RN
Chief Nurse Executive Officer
Tanya Osborne-McKenzie is the chief nurse executive officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen.
Tanya first joined Dignity Health in October 2019 as Senior Director of Neuroscience Nursing at St. Joseph’s where she was later promoted to Assistant Chief Nursing Officer and temporarily served as Interim Chief Nursing Executive Officer. Tanya served as CNO at Martin Luther King Jr. Healthcare System in Los Angeles prior to her Dignity Health return in 2023.
Tanya is a tenured nurse leader who has served in several nursing leadership roles including interim vice president of nursing and patient safety officer for Trinity Health – Saint Agnes Medical Center in Fresno, Calif.; and director of critical care for Salinas Valley Memorial Hospital in Salinas, Calif. She earned her doctorate in nursing practice, organizational leadership from the University of San Francisco.
Tanya Osborne-McKenzie, DNP, MSN/MBA, RN
Chief Nurse Executive Officer
Tanya Osborne-McKenzie is the chief nurse executive officer for Dignity Health St. Joseph’s Hospital and Medical Center, St. Joseph’s Westgate Medical Center, and Arizona General Hospital—Laveen.
Tanya first joined Dignity Health in October 2019 as Senior Director of Neuroscience Nursing at St. Joseph’s where she was later promoted to Assistant Chief Nursing Officer and temporarily served as Interim Chief Nursing Executive Officer. Tanya served as CNO at Martin Luther King Jr. Healthcare System in Los Angeles prior to her Dignity Health return in 2023.
Tanya is a tenured nurse leader who has served in several nursing leadership roles including interim vice president of nursing and patient safety officer for Trinity Health – Saint Agnes Medical Center in Fresno, Calif.; and director of critical care for Salinas Valley Memorial Hospital in Salinas, Calif. She earned her doctorate in nursing practice, organizational leadership from the University of San Francisco.