You are more than a patient.
You are a whole person.
At Ackerman, we see beyond your diagnosis – we see you.
At Ackerman Cancer Center, patients can feel confident in the expertise and compassion of our care team. We provide a range of advanced radiation treatments, including conventional radiation therapy and proton therapy, a highly precise option designed to reduce side effects and improve quality of life.
Our commitment to care extends well beyond treatment. We work in partnership with referring physicians and other specialists to deliver comprehensive care. Most importantly, we build lasting relationships with our patients and continue to support their health and well-being throughout every stage of their journey.
We are proud to offer Accelerated Partial Breast Irradiation (APBI), Electron Therapy, Medical Linear Accelerators, External Beam Radiation Therapy, GammaTile, High Dose Rate Brachytherapy, Intensity Modulated Radiation Therapy (IMRT), Image Guided Radiation Therapy (IGRT), I-131 Therapy, Proton Therapy, Stereotactic Ablative Radiotherapy (SABR), Stereotactic Body Radiation Therapy (SBRT), Stereotactic Radiosurgery (SRS), and Volumetric Modulated Arc Therapy (VMAT).
Ackerman Cancer Center is the world’s first private practice offering proton beam technology. Our board-certified radiation oncologists use this advanced technology to precisely target tumors, minimizing side effects and limiting radiation exposure to surrounding healthy tissue. Click below to read about the proven benefits of proton therapy.
A prostate cancer diagnosis requires a dedicated team and access to the most advanced treatment options, including proton therapy. At Ackerman Cancer Center, we provide comprehensive screening, diagnostic, and treatment services to ensure each patient receives the highest level of personalized care.
Ranked among the top three cancer treatment centers in Jacksonville, driven by exceptional Google reviews from grateful patients.
Vice President of Operations, Gigi Ackerman Schwartz, MBA, was named among Jacksonville’s Top 40 Leaders Under 40.
Awarded the Best of Florida distinction in the top Physician Practice category, reflecting votes from patients and referring providers.
Clinic Manager Vivienne Bennett, MS, RT (R) (M), received the Sister de Sales Award for Outstanding Practice Administrator.
Ackerman Cancer Center - Amelia Island, was recognized as the 2025 Health & Wellness Business of the Year, reflecting our team’s dedication to exceptional cancer care, advancing community wellness, and supporting every patient with compassion and excellence..
At Ackerman Cancer Center, our mission is to deliver the highest quality personalized care while serving people across all walks of life. In addition to providing advanced radiation oncology treatments, we are dedicated
What is Proton Therapy? Proton therapy is an advanced form of radiation treatment that uses proton beams to precisely target and destroy cancer cells while minimizing exposure to healthy tissue. It
At Ackerman Cancer Center, we see beyond your diagnosis – we see you. At Ackerman Cancer Center, patients can feel confident in the expertise and compassion of our care team.
Arlean Marcellus joined Ackerman Cancer Center in March 2023 and leads physician outreach. She builds and strengthens meaningful partnerships with referring physicians, healthcare facilities, and medical groups, driving growth in patient referrals. Arlean holds a degree in Health Science with a concentration in Public Health from the University of North Florida. Beyond her work, she volunteers with Feeding Northeast Florida. In her free time, Arlean enjoys running, roller skating, and spending time with her family.
Shelby Goodman joined the Ackerman Cancer Center team in January 2023 as the oncology social worker. She earned her bachelor’s and master’s degrees in social work from the University of North Florida and went on to become a licensed clinical social worker (LCSW). With over five years of experience supporting individuals and families in the social work field, her practice focuses on psychosocial support, care coordination, and advocacy to enhance the quality of life for patients and their loved ones. Shelby is a member of the Florida Society of Oncology Social Workers (FSOSW). In her free time, she enjoys reading and spending time with her family and dog.
Kali Molter joined Ackerman Cancer Center in August 2024 and supports community outreach, marketing initiatives, and engagement efforts. She holds both a Master of Business Administration and a Bachelor of Business Administration in marketing from the University of North Florida. A Jacksonville native and Bishop Kenny alum, Kali is passionate about contributing to and strengthening the local community. She brings experience in hospitality and event management and serves on the Jacksonville Chamber’s NEXTUP JAX Professional Development and Community Engagement committees. Outside of work, Kali enjoys living at the beach, running and yoga, traveling, and is a lifelong Jacksonville Jaguars fan.
Ceilidgh O’Brien is the patient relations manager at Ackerman Cancer Center, where she leads the patient relations team and helps ensure every patient experience is organized, supportive, and welcoming. She oversees scheduling and communications and is passionate about creating efficient processes that help patients and staff feel
informed, supported, and cared for. Ceilidgh earned a Bachelor of Science in health sciences from the University of South Florida in 2024 and values building strong, compassionate connections with both patients and colleagues. A Boston native, Ceilidgh traded snow for sunshine and now spends her free time running with friends
and supporting the Jacksonville Humane Society.
Tiffany Vaughn brings extensive experience and steady leadership to Ackerman Cancer Center, with 24 years of service to the practice. For the past 15 years, she has served in leadership roles, overseeing both radiation therapy and imaging departments with a focus on quality care, collaboration, and operational excellence. Tiffany is a proud
member of the American Society of Radiologic Technologists and the American Registry of Radiologic Technologists. She earned her technologist degree from St.
Vincent’s Medical Center and completed radiation therapy training from Washburn
University. Outside of work, Tiffany enjoys spending time with her family, relaxing in or
around the water, and taking on hands-on projects around her home.
Vivienne Bennett joined Ackerman Cancer Center in November 2013 as a mammography technologist and was promoted in 2021 to oncology clinic manager, overseeing clinical operations across all four locations. She provides leadership for daily clinic operations, supports multidisciplinary oncology teams, ensures regulatory and accreditation compliance, and implements operational strategies to improve quality, safety, and patient experience. Vivienne holds a master’s degree in medical radiation sciences from the University of Sydney in Australia and is a member of the American Registry of Radiologic Technologists (ARRT). Outside of work, she enjoys watching sports, walking, and spending time with friends and family.
Tim Scott joined Ackerman Cancer Center in 2003 and brings nearly 40 years of experience in radiation oncology and medical dosimetry operations. He oversees medical dosimetry, facilities, special projects, and research and has played a key role in nearly every building project and major technology launch at the center. Tim is passionate about innovation and the development, construction, and commissioning of advanced treatment technologies, including proton therapy. Beyond his professional work, Tim serves as a worship pastor and is a brass musician. In his free time, he enjoys restoring classic cars and spending time on the lake.
Greg Sarkisov joined Ackerman Cancer Center in September 2019 and oversees all
facets of information technology and information security within the organization. Greg has over twenty years of experience in information technology and security. With over six of those years in our practice, he has led initiatives to strengthen our core security and expand the use of various technologies to help aid our staff in providing effective
and efficient patient care. Greg holds a Bachelor of Science degree in information
systems security from ITT Technical Institute. Outside of work, he stays active in the
community and is a member of the IT Council with the Jacksonville Chamber of
Commerce. In his free time, Greg enjoys spending time with his family and friends.
Jenny Zelaya is the director of human resources at Ackerman Cancer Center and
Ackerman Urology, where she oversees all HR functions and fosters a positive,
inclusive workplace culture. She holds a master’s degree in health administration from the University of Miami and brings extensive experience in talent management, employee engagement, and regulatory compliance. Fluent in Spanish, Jennifer enjoys staying active outside of work, playing pickleball, golfing with friends and family, and spending time with her golden retriever, Lenny.
Amy Mousa joined Ackerman Cancer Center in November 2021 and serves as the
director of finance and accounting. In her role, she oversees financial operations and supports the organization’s strategic and operational goals. Amy holds a Florida CPA license and earned her Bachelor of Business Administration in accounting from the
University of North Florida. Outside of work, she enjoys staying active, traveling, and
spending quality time with her family.
Nelson Miksys joined Ackerman Cancer Center in October 2019. As chief medical physicist, Nelson manages the medical physics department, which is responsible for
quality assurance of all patient treatment plans, calibration of the radiation therapy equipment, maintenance of the radiation safety program, integration of new technology
into the clinic, and providing clinical technical support across all aspects of the cancer center. Nelson has over ten years of experience as a medical physicist and comes to Ackerman Cancer Center from The Ottawa Hospital Cancer Centre (Ottawa, Canada). Nelson has a PhD in medical physics from Carleton University (Ottawa, Canada) and a
master’s degree in medical and health physics from McMaster University (Hamilton,
Canada). Outside of work, Nelson is actively involved in his children’s sports activities and community social events and is passionate about maintaining a healthy lifestyle through regular physical fitness and outdoor activities.
Rob Tokarz joined Ackerman Cancer Center in January 2014 and oversees the Physics, Dosimetry, Therapy, Imaging, IT, and Transcription departments. He holds a Bachelor of Science in physics from Notre Dame and a Master of Science in medical physics from Columbia University. Rob has worked in the field of medical physics for 25 years and has worked previously at Memorial Sloan Kettering Cancer Center. Prior to his career in medical physics, Rob was an officer in the United States Navy, where he attained the rank of lieutenant commander. As a naval aviator, he flew Seahawk
helicopters out of Naval Station Mayport and was stationed overseas in Bahrain.
Gigi Ackerman Schwartz joined Ackerman Cancer Center in November 2020 and leads strategic planning initiatives across all departments, directs all aspects of revenue cycle management, and works to develop and maintain relationships with community partners. Gigi holds an MBA from Tulane University. A Jacksonville native, she is involved in several local charitable and civic organizations. She serves as chair of the Art in Public Places Committee for the Cultural Council of Greater Jacksonville, is a member of the National Young Leadership Cabinet, and is a trustee of the Jewish Community Alliance and Jacksonville Jewish Center. In her free time, Gigi enjoys playing mahjong, exploring new hobbies with friends, and spending time with her husband and two-year-old daughter.
