Our Leadership

Chief Executive Officer  and Market Chief Executive Officer

Tonya Darner serves as the chief executive officer of UP Health System – Marquette. A healthcare executive with more than 25 years of experience, Tonya brings a deep background in clinical operations, strategic growth, and medical practice management across both civilian and military healthcare systems.

She began her career in the United States Air Force, where she served for 20 years in progressively responsible roles, culminating in senior leadership within medical operations. Her military service instilled in her a disciplined, mission-driven leadership style and a strong foundation in patient-centered care, operational efficiency, and team development.

Following her military retirement in 2011, Tonya transitioned into civilian healthcare leadership and held several key positions at UP Health System – Marquette, including senior director of neurosciences, imaging, and on-call specialist services, and director of regional operations across multiple service lines. In 2021, she returned to UPHS – Marquette as chief operating officer after serving as COO at Aspirus Wausau Hospital, a leading tertiary care center in Wisconsin.

Throughout her career, Tonya has led high-performing teams, overseen complex clinical operations, and advanced initiatives to improve access, quality, and patient outcomes in rural and regional healthcare settings. Her leadership reflects a deep commitment to delivering high-value care and fostering a culture of collaboration, accountability, and service.

Chief Medical Officer

Board-certified in family medicine and integrative medicine, Dr. Long is a longtime UP Health System physician, where she has been practicing for more than 23 years. She brings extensive medical expertise and clinical leadership experience, having held roles such as chief of staff, section chair for the Department of Family Medicine, and faculty physician for the UPHS – Marquette Family Medicine Residency Program through Michigan State University.

Dr. Long earned a Bachelor of Science in biology from Michigan State University (Lyman Briggs), a Doctor of Medicine degree from the University of Michigan Medical School, and completed her residency in family medicine at Marquette General Hospital (now UP Health System – Marquette), where she served as chief resident for two years. She later completed a fellowship in integrative medicine at the Arizona Center for Integrative Medicine. Her professional memberships include the Alpha Omega Alpha Honor Medical Society, the American Academy of Family Physicians, the American Medical Association, and the Michigan State Medical Society.

As chief medical officer, Dr. Long oversees the medical operations of the hospital and ensures patients and staff are cared for with the utmost quality and safety. She also serves as the primary liaison between medical staff and administrators and supports medical staff recruitment, retention and professional growth.

Outside of work, Dr. Long is an active member of the greater Marquette community and enjoys hiking, gardening, kayaking, beekeeping, camping and spending quality time with her family.

Chief Financial Officer

Henrietta joined UP Health System – Marquette in May 2022 and is the chief financial officer. She holds a Bachelor of Science in business administration from Concord University and is a certified public accountant.

Henrietta brings extensive experience in private practice and at both local and regional levels with multiple public accounting firms, as well as serving in several chief financial officer roles, including at Twin County Regional Hospital, a Duke LifePoint hospital in Virginia. Her national experience in hospital management includes work with community health systems in Pennsylvania, West Virginia, Texas and Florida.

Her past professional affiliations include the American Institute of Certified Public Accountants and the public steering committee for the Virginia Society of Certified Public Accountants.

Market Chief Nursing Officer, UP Health System – Bell and  UP Health System – Marquette
Chief Nursing Officer and Chief Operating Officer, UP Health System – Marquette

Christine joined UP Health System in May 2021, bringing more than 25 years of progressive leadership and management experience in nursing, patient services and business operations in hospital settings—large and small, urban and rural.

She has served as chief nursing officer in both New York and Pennsylvania, as well as assistant vice president of nursing at Montefiore University Hospital in the Bronx and associate nursing officer at Upstate University Hospital Community Campus in Syracuse, New York. Christine has also worked as a heart center director and a practice administrator for a group of cardiac surgeons.

She earned a Bachelor of Science in nursing from Vermont College of Norwich University, a Master of Science in nursing from the University of Vermont, and a Master of Business Administration from DeSales University in Pennsylvania.

Assistant Chief Nursing Officer

Meg joined UP Health System – Marquette in early 2023 and is the assistant chief nursing officer. She earned a Bachelor of Science in nursing from the University of Cincinnati and a Master of Science in nursing through Chamberlain College of Nursing’s executive leadership program. She has also been accepted into the Doctor of Nursing Practice program at Chamberlain College of Nursing.

Meg previously served as director of the intensive care unit, respiratory therapy, cardiac rehab and inpatient hemodialysis at Haywood Regional Medical Center in Clyde, North Carolina. In that role, she managed a team of nearly 100 staff members, leading efforts to provide high-quality care while fostering a positive, growth-oriented environment. Prior to her time at Haywood Regional, she held various nursing leadership positions at several Ohio hospitals, with a focus on emergency and critical care medicine.

She is a member of the American Association of Critical-Care Nurses and was a recipient of the DAISY Nurse Leader Award in 2022, which honors nurse leaders who provide exceptional, compassionate leadership and create a meaningful environment of care for staff, patients and families.

Vice President of Operations

Alyson began her career at Marquette General Hospital in 1985 and has worked in the lab, medical records and emergency medical services as a licensed paramedic and instructor with the School of EMT. She also spent five years as a civilian site manager and safety engineer with the U.S. Air Force, working on base conversion and hazardous waste restoration projects.

She joined the hospital as risk and safety director in 2005 and later became director of risk management and compliance. In 2021, she was named market director of risk management for UP Health System – Bell, Marquette and Portage. Alyson has collaborated with hospitals and EMS agencies throughout the Upper Peninsula since 2002 to lead emergency preparedness programs. She is a member of the Michigan Department of Health and Human Services Emergency Medical Services Coordination Committee and serves as a Michigan Health & Hospital Association representative on the state’s Legislative Subcommittee.

In her free time, she enjoys carpentry and woodworking, traveling, and spending time on the water with her family during the summer.

Vice President of Operations

Dr. Collins brings more than 21 years of nursing and leadership experience to the role and will oversee the clinical administration of the heart and vascular, perioperative, oncology and imaging service lines.

A board-certified advanced nurse executive and critical care nurse, Dr. Collins previously worked as a cardiovascular nurse, flight nurse and critical care educator. He later served as director of clinical operations for Indiana’s largest cardiovascular and pulmonary service line, and expanded into multi-facility operations management, leading successful reaccreditation efforts.

Dr. Collins earned a Bachelor of Science in nursing from the University of Toronto, an MBA in health care administration from Indiana Wesleyan University, and a Ph.D. in nursing science and advanced cardiovascular sciences from Indiana University at Indianapolis. His doctoral work explored the relationship between cognitive deficits in acute decompensated heart failure and early hospital readmissions.

Originally a professional violinist, Dr. Collins enjoys spending time outdoors with his wife, Sarah, and their two daughters. He is committed to promoting clinical excellence, team engagement and high-quality health care for the community.

Vice President of Operations

Polly brings more than 25 years of progressive leadership and laboratory operations experience to the role. A proud native of the Marquette area, Polly began her career at Marquette General Hospital in 1995 as a phlebotomist. After gaining valuable experience elsewhere, she returned to Marquette in 2005 and has been instrumental in advancing health care services in the region ever since.

Throughout her career, Polly has held several key leadership positions, including director of laboratory services and laboratory manager for quality and compliance. She has successfully led multiple laboratory accreditations, including Joint Commission, AABB, CAP and FDA inspections, and has been at the forefront of implementing strategic initiatives to improve laboratory efficiency, patient outcomes and operational excellence.

Polly holds a Master of Science degree in clinical molecular genetics and a Bachelor of Science degree in clinical laboratory science from Northern Michigan University, where she also served as a laboratory instructor. She is certified as a medical laboratory scientist (ASCP) and medical technologist (AMT), among other professional credentials.

Dedicated to high-quality patient care and continuous improvement, Polly is passionate about driving operational success while maintaining strong partnerships with health care providers, employees and community stakeholders.

Regional Vice President, Physician Services

Peter Camilli joined UP Health System in June 2020 and is the regional vice president of physician services. In this role, he oversees strategic operations for the clinics and physician practices of UP Health System’s three hospitals.

A servant leader with extensive experience in physician practice administration, Camilli has held roles across the Midwest, including director of clinic operations at Wheaton Franciscan Medical Group in Waterloo, Iowa, and administrative director of medical and surgical specialties at Ascension Medical Group in Milwaukee, Wisconsin. He is an active member of the Medical Group Management Association and serves as president of the board of directors for the Michigan State University College of Human Medicine Upper Peninsula Education Corporation.

Camilli holds a Bachelor of Arts from the University of Notre Dame, a Master of Healthcare Administration from the University of Minnesota’s Carlson School of Management, and a Master of Arts in geography and geographic information systems from the University of Oklahoma.