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Executive Team

Meet Our Team
Debbie Shumway

Executive Director

Debbie assumed the top position in 2016 after serving the agency since 1994, overseeing clinical care, finance, fund development, volunteers, bereavement, information services and the thrift stores. During that period, the agency grew from serving 140 patients a day with 120 staff members and a $5 million budget to supporting 3,000 patients a day with 1,400 staff and a $130 million budget. A certified public accountant, Shumway was named Chief Financial Officer of the Year in the nonprofit category by the Arizona chapter of Financial Executives International.


Rachel Behrendt

Senior Vice President, Operations

Rachel oversees all clinical operations. A doctor of nursing practice, Behrendt’s career spans more than 25 years in a variety of roles, including staff nurse, nurse educator, clinical nurse specialist, VP of nursing and chief nursing officer. Her clinical background is primarily oncology and palliative care. She joined Hospice of the Valley in 2016. Behrendt received her doctorate in nursing practice from University of Medicine and Dentistry of New Jersey, Newark, New Jersey. She received her master of science in nursing, nursing education at Monmouth University, West Long Branch, NJ.


Ned Stolzberg, MD

Executive Medical Director

Ned oversees the agency’s physicians and nurse practitioners. He joined HOV as a medical director in 2007. He has worked as both a team medical director and as a palliative care consultant in the hospital setting. After growing up in the Boston area, Dr. Stolzberg attended the University of Texas, where he received a Bachelor of Arts degree. He went on to graduate from medical school at the University of Massachusetts where he was awarded the Chancellor's Award for Outstanding Medical Student. He did his residency at Phoenix Baptist Hospital.


Joyce Bulman

Chief Operations Officer

Joyce oversees centralized operations, which includes quality/compliance and education. A registered nurse, Bulman began her career in Pediatrics. In 2007, she accepted an administrative position with home care and hospice and found her passion. She attained a master’s of business administration in healthcare. In 2012, she joined Hospice of the Valley. 


Lin Sue Cooney

Director of Community Engagement

Lin Sue joined Hospice of the Valley in 2015 after more than 30 years as a primary news anchor at 12 News/KPNX. She oversees community-facing departments including volunteers, fund and business development and creative services. Cooney also volunteers, along with her standard poodle Max. To arrange a speaking engagement, contact Lin Sue.


Gillian Hamilton, MD, PhD

Administrative Medical Director

Gill created innovative programs such as our Dementia, Pulmonary, Congestive Heart Failure, Pet Connections, and Mindfulness Training programs. She oversees medical education in palliative care for Maricopa County’s health-care providers and is board certified in Internal Medicine, Geriatrics, Hospice and Palliative Medicine. She received her MD from University of Arizona, Tucson, and her doctorate in physiological and clinical psychology from the University of Florida.


Sabrina Hoffman

Vice President of Human Resources

Sabrina joined Hospice of the Valley in 1994 to establish the agency’s first human resources department. Since then she has created state-of-the-art programs and systems supporting the agency’s strategic initiatives and goals.