Tina Siebeneck is a highly accomplished oncology nurse practitioner with more than 35 years of experience in radiation oncology and advanced patient care. 

Tina launched her nursing journey in 1984 as a graduate of St. Vincent School of Nursing in Toledo, Ohio. She earned her BSN from Bowling Green State University in 1994 and her MSN as a Family Nurse Practitioner from the University of Toledo in 2012. Her certifications include Oncology Certified Nurse (OCN) since 1992, Family Nurse Practitioner since 2012, and Advanced Oncology Certified Nurse Practitioner (AOCNP) since 2022. 

She dedicated 30 years to St. Vincent Mercy Medical Center in Toledo, with 22 years focused on radiation oncology as an RN before transitioning to NP roles. She later practiced at multiple sites across Northwest Ohio and Southeast Michigan with a large radiation oncology group. 

In 2018, Tina joined Ironwood Cancer & Research Centers in Glendale, Arizona, where she continues as a Nurse Practitioner in the Radiation Oncology Department. She has also emerged as a conference planner and speaker for Horizon. 

A recognized leader, Tina served as president of the Toledo Oncology Nursing Society (2005–2007), planned national Oncology Nursing Society conferences, and represented U.S. radiation oncology nursing in the 2006 China Nursing Ambassador Program. She received the ONS national award for Excellence in Nursing Care for Radiation Oncology Patients in 2007 and has published influential research and case studies in top oncology journals. 

In addition to oncology, she co-founded a medically managed weight loss practice with her NP daughter. Passionate about education, mentorship, and wellness, Tina remains committed to advancing patient outcomes and sharing her expertise.