She has a license in clinical social work and over 20 years of social work related experience. Dr. Callahan also has extensive experience in social work education. She strives to produce work that reflects her commitment to quality course design and online education. Dr. Callahan's research focus is on advancing hospice, palliative, and long-term care, particularly through the delivery of spiritually sensitive social work. This has resulted in numerous presentations and publications, including the book Spirituality and Hospice Social Work published by Columbia University Press.