Board of Directors

Board Service

What are the qualifications for board service?

The MDCB seeks a diverse board comprised of clinicians, educators, public member, medical physicists and radiation oncologists. CMDs should meet the following criteria:

  • Be a CMD for a minimum of 3 years
  • Have a minimum of a BS degree
  • Be a current practitioner 

What's involved?

  • CMD Board terms are 5 years in length.
  • The Board meets for two days, 3 times a year, in cities across the US and Canada.
  • At board meetings issues related to the administration of the certification exam, policy and strategic initiatives are considered.
  • Individual board members' knowledge and expertise are an important component during discussions. Each member should be prepared to discuss the issues at all meetings.
  • Each board member serves on one or more board committees: Executive, Eligibility, Ethics, Finance, Maintenance of Certification, Test Development or Leadership Development. Time commitment on each committee varies and may be up to 2 hours per week. Committee service is rotated annually.
  • Board members are guided through the process to submit the requisite number of exam items for each board meeting and will be awarded a maximum of 20 CE during the board term.

So why would you want to give your time and effort?

  • Quite simply, because you will be rewarded. The reward is not in funds, of course, but in other valuable currency:
  • Continuing education - learn from fellow board members in the oncology field, CMDs, Physicists and Radiation Oncologists.
  • Professional growth - gain new leadership skills that will augment your CV.
  • Interpersonal skills development - build both social and career relationships that will last for many years.
  • Pride in enhancing the profession- giving back to your community, your knowledge, expertise and time.

What is the nominating process?

  • Applications are reviewed by the MDCB Leadership Development Committee.
  • Selected candidates are interviewed via teleconference by the committee.
  • The committee recommends candidates for nomination to the board.
  • Final candidates are elected by board vote.
  • Elected candidates are notified of board decisions in March.

Applications are accepted annually between November 1 and February 1. CMDs interested in board service or wish to nominate a fellow colleague can submit a completed application, and email it with a current CV, letter to the president indicating your service goals and two letters of recommendation to with the subject line "MDCB Board Nomination."

MDCB Board of Directors 2022-2023


Christopher Amaloo, BSEE, CMD
At-large Representative 

Christopher Amaloo is a clinical dosimetrist at Cancer Treatment Services International, part of the Advanced Oncology Solutions offered by Varian, Siemens Healthineers company. He graduated from the University of Illinois with a Bachelor of Science degree in electrical engineering. After serving in the US Navy, he started a hospitality company in the southeast. Later his interest in dosimetry sparked a career change and subsequently earned his CMD certificate in Roswell Park Cancer Institute in Buffalo, New York. He passed his CMD boards in 2014. Prior to his work with CTSI, he assisted with the transition to The James Cancer Hospital and Solove Research Institute at The Ohio State University and then returned to North Carolina to work at the Cone Health Cancer Center in Greensboro. He was recently awarded his Master of Science in dosimetry from the Southern Illinois University program.

Christopher’s interests include volunteerism, community engagement, cancer survivorship, patient value maximization, radiotherapy quality & safety, and workflow automation. He has published several research papers and informational posters on these topics. He was elected Cone Health Cancer Center’s Employee of the Year in 2018 based on his efforts with survivorship and currently leads a workflow efficiency task group and assists with the Quality Improvement team at CTSI. He is excited about his service on the board during a dynamic time in the field of radiation oncology, with the hope of providing value to the medical dosimetry profession and the patients they serve.


Stephanie Olson, MS, R.T.(T), CMD
At-large Representative

Stephanie Olson is the lead dosimetrist at the University of Wisconsin, Madison Hospital Radiation Oncology department.  She received her bachelor’s degree in Radiation Therapy in 2003 and worked as a therapist for 11 years before returning to school.  She obtained her master’s degree in Medical Dosimetry in 2015 and earned her CMD in 2016.  In addition to her daily duties, she is an adjunct professor for the University of Wisconsin-LaCrosse’s Radiation Therapy program and participates in planning studies for research and publications.

When not busy with work, she enjoys watching her two boys play sports, spending time with family, reading, and spinning.


George Spencer Arnould, MS, CMD 
At-large Representative 

Spencer serves as Medical Dosimetry Program Director at Mount Sinai Health System and is a Clinical Assistant Professor at Stony Brook University. In 2014, he was awarded a Master’s degree in Dosimetry at the University of Wisconsin LaCrosse and subsequently earned his CMD in 2015. To continue his professional growth, Spencer joined the AAMD Journal staff as Associate Editor.

Spencer sees his role on the board as an opportunity to continue to learn, grow, and give back to the medical dosimetry profession.


Karisa Glowinski, BS, RT(T), CMD
At-large Representative

Karisa Glowinski is a Staff Dosimetrist at the New Mexico Cancer Center in Albuquerque, New Mexico. She obtained her Bachelor of Science in 2012 from The Ohio State University, a Graduate Certificate in Medical Dosimetry from Indiana University in 2014, and was certified in 2015. She is currently in the process of obtaining a Master of Health Care Administration with an expected graduation date of May 2022. Within her current role at UNM, Karisa has been involved in various research and teaching opportunities.

Karisa views board service with the MDCB as an opportunity for professional growth and a way to give back to the medical dosimetry profession. Additionally, she believes the opportunity to collaborate with fellow board members provides an invaluable learning opportunity.

In her free time, Karisa enjoys volunteering at a local dog shelter and spending time outdoors with her husband and three dogs.


Ontida Apinorasethkul, MS, CMD
At-large Representative 

Ontida is the Lead Photon Dosimetrist at the Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania. She completed her Bachelors of Science in Biology in Genetics, and Business Management in Finance at Stony Brook University, NY. As she entered the Medical Dosimetry career, she completed her Bachelors of Science in Radiologic Sciences in Medical Dosimetry at Thomas Jefferson University in 2011 and earned her CMD in 2012. She completed her Master’s degree in Medical Dosimetry at University of Wisconsin - La Crosse in 2015.

Ontida has been an active volunteer on the AAMD Directed Journal Reading Committee since 2014. As a member of this committee, she has participated in generating quiz questions from the selected journal articles as one of the ways for AAMD members to earn CE credits.

Natasha Gump, CMD, RT(T)
At-large Representative 

Natasha Gump is a dosimetrist with Piedmont Henry Hospital in Stockbridge, Georgia.  She received her associate degree in Radiation Therapy in 2001.  She obtained her dosimetry certification from the University of North Carolina at Chapel Hill and earned her CMD in 2006.  In 2012, she obtained her Bachelor of Science degree in health science from Nova Southeastern University.

With Piedmont, Natasha is an active member of the metro Atlanta Continuous Quality Improvement Committee (CQI), co-facilitates physics residency leadership fundamentals, and co-chairs the metro Atlanta dosimetry peer review committee.

Natasha participated in the 2018 MDCB Job Task Analysis Pilot Survey and served on the 2019 MDCB Cut Score Study Task Group.  Currently, she volunteers on the AAMD membership committee.  She has a passion for volunteering and hopes to continue growing professionally through her service.

In her free time, Natasha enjoys spending time with her husband at the target range, attending skincare and fashion events, and cooking for her wonderful family, who hold the keys to her heart.

Michael Manteuffel, MS, R.T. (R)(T), CMD
AAMD Representative 

Michael is a Staff Dosimetrist at the Mosaic Life Care Center, a member of the Mayo Clinic Care Network, in St. Joseph, Missouri. He was awarded a Master’s degree in Health Care Management in 2011 and earned his CMD in 2012.

Michael served on the AAMD Scope of Practice Phase II Task Group in 2012-2013. As a member of the task group, he contributed to the research and drafting of the revised scope of practice. Michael found his participation on the committee a valuable experience and hopes to continue to expand his professional growth through his MDCB board service.

Antonio Martinez Jr., CMD
At-large Representative

Antonio earned his B.S. in Biology from the University of Texas at Brownsville and Texas Southmost College in 2014. He went on to earn his B.S. in Medical Dosimetry at the University of Texas MD Anderson Cancer Center in 2017 and passed the MDCB certification exam to receive his CMD certification in 2018.

Tony is considered by his colleagues to be a great asset in the advancement of the dosimetry profession at his workplace, Texas Oncology, where he served on the Dosimetry Excellence Leadership Committee. He has also been instrumental in implementing standard templates and planning protocols, as well as working on Eclipse scripting. He has delivered a number of presentations on treatment planning tips and tricks.

Allison McCarthy, BS, CMD
At-large Representative

Allison McCarthy is the Chief Dosimetrist at New York University (NYU) Langone Medical Center, New York City. She completed the Medical Dosimetry Program at Stony Brook University and earned her CMD in 2005.

At NYU, Allison is the preceptor for the Medical Physics Rotation. In addition to her preceptor duties, she provides oversight for the Radiation Therapist Clinical Treatment Planning Rotation.  She has participated in the research for a number of published papers.

Akhil Tiwari, BS, CMD
At-large Representative

Akhil Tiwari is a staff dosimetrist at Memorial Sloan Kettering Cancer Center. He received his Bachelor of Science in medical dosimetry in 2014 at the University of Texas M.D. Anderson Cancer Center and was board certified in 2015. 

Akhil was introduced to volunteering with the MDCB by participating for the Job Task Analysis. He also serves as a member of the communications committee for the AAMD. He hopes to continue his professional growth through his board service and sees it as a way to give back to the profession.

Neil Savage, PMP
Public Member

Neil serves as the Public Member of the MDCB Board out of a commitment to community service and a desire to support the medical community. As a Project Management Professional, he's a strong proponent of credentialing who believes in MDCB's mission.

Neil is currently a Marketing Manager at Comcast NBCUniversal in Atlanta, Georgia, where he works on the communications team and focuses on e-commerce. Outside of work, Neil enjoys writing, woodwork, and spending time with his girlfriend, Sam, and their two cats, Yum Yum and Chai.



Minsong Cao, PhD
AAPM Representative

Dr. Minsong Cao is one of two physicist representatives to the American Association of Physicists in Medicine (AAPM). Minsong is an Associate Professor at the University of California, Los Angeles in California and an Adjunct Associate Professor at Sichuan University, China. He earned his American Board of Radiology (ABR) certification in 2010.

Dr. Cao is active in the medical physics field. He currently serves on several AAPM Subcommittees including the Training and Practice of Medical Dosimetry Subcommittee. He also serves as a reviewer for several journals including The International Journal of Radiation Oncology, Biology, Physics, Journal of Applied Clinical Medical Physics, Medical Dosimetry Journal and the British Journal of Radiology.

Steven de Boer, MSc, FAAPM
AAPM Representative

Steven de Boer is one of two physicist representatives to the American Association of Physicists in Medicine (AAPM). Steven is a Medical Physicist at Roswell Park Cancer Institute and a Research Assistant Professor at Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo. Steven also serves as a Medical Physics surveyor for the American College of Radiation Oncology. He earned his American Board of Radiology (ABR) certification in Therapeutic Radiological Physics in 1997.

Steven is an active volunteer in the medical physics community. Currently, he serves as Chair of both the AAPM committee on the Medical Physics education of Allied Health Professionals and the Therapy Practice Accreditation subcommittee and as a member of the Clinical Practice Committee, Education Council, and Task Group 287. Additionally, Steven is a reviewer for several journals, including the Medical Physics journal, Journal of Applied Clinical Medical Physics, and Sensors journal.

Blair Murphy, MD
ACR Representative

Dr. Blair Murphy is Chief of Pediatric Radiation Oncology and serves as Assistant Professor at Oregon Health & Science University. She has actively participated in several clinical trials and research projects in the field of radiation oncology. Dr. Murphy has co-authored a number of published papers in medical journals and textbooks. She is a member of several professional societies including ASTRO and ACRO.

Aditya Halthore, MD
ASTRO Representative

Dr. Aditya Halthore is the ASTRO liaison to the MDCB. He is an Assistant Professor, Dept of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins. His clinical focus is in thoracic and genitourinary cancers.