Dosimetrist - Proton Center

Job ID
Regular Full-Time
Allied Health


Fred Hutchinson Cancer Center is an independent, nonprofit, unified adult cancer care and research center that is clinically integrated with UW Medicine, a world leader in clinical care, research and learning. The first National Cancer Institute-designated cancer center in the Pacific Northwest, Fred Hutch’s global leadership in bone marrow transplantation, HIV/AIDS prevention, immunotherapy, and COVID-19 vaccines has confirmed our reputation as one of the world’s leading cancer, infectious disease and biomedical research centers. Based in Seattle, Fred Hutch operates eight clinical care sites that provide medical oncology, infusion, radiation, proton therapy, and related services, and network affiliations with hospitals in five states. Together, our fully integrated research and clinical care teams seek to discover new cures to the world’s deadliest diseases and make life beyond cancer a reality.


Every individual at FHCC plays a unique role in supporting our mission. Our collective success hinges on each of us conducting ourselves in accord with a set of core values:


  • We are patient-centered. Everything we do must be linked to our ability to deliver better, safer outcomes for our patients.
  • We are innovative. We nurture an environment that fosters unconventional thinking, a passion for discovery, and the open-mindedness to invite discovery from unexpected places.
  • We are respectful. We are deeply respectful of our patients, their families, and each of our colleagues who serve them in so many different and important
  • We are collaborative. We understand that asking for and offering help in how to do better is not just a right, but among our most important
  • We are We cannot just be comfortable with change; we must embrace it as proof that we are making progress.
  • We are responsible. Because our work is focused on people's well-being, we approach it with the highest level of ethical, fiduciary, and environmental

This is an extraordinary opportunity to lead disruptive continuous innovations in the fight against cancer.


The Medical Dosimetrist is responsible for developing computer generated radiation dose distributions, calculating radiation dose treatment times or monitoring unit settings to deliver prescribed radiation to a defined tumor volume as prescribed by the radiation oncologist. At the direction of the Medical Dosimetry Manager, and on a regular basis, the Dosimetrist will conduct quality assurance reviews, and conduct quality checks on various equipment. 


  • Works directly with the physician in verification simulation, treatment planning procedures, and patient specific radiation dose measurements, including all electronic documentation, charting and coding in Mosaiq and patient electronic medical record (EMR). 
  • Assists medical physicist in calibration of equipment and radioactive sources. 
  • Develops computerized treatment plan, calculates treatment doses and / or monitor unit setting to deliver dose to a tumor volume as prescribed by a radiation oncologist. 
  • Calculates and documents dose in the patients MOSAIQ electronic treatment records. 
  • Verifies the mathematical accuracy of all calculations. 
  • Assists in the selection, planning, fabrication and quality review and approval of treatment devices to aid in beam delivery modification. 
  • Assists in the planning, production and quality review and approval of immobilization devices and other treatment aids. 
  • Provides technical assistance to the therapeutic radiological physicist in radiation protection. 
  • Performs weekly quality assurance checks of radiotherapy treatment charts. 
  • Follows all policies and procedures established for the accurate, timely and effective development and QA of all dosimetry responsibilities. 
  • Responsible for thorough and timely documentation and coding of work in the EMR and MOSAIQ. 
  • Implements and assists in the maintenance of the quality system for medical dosimetry and record keeping. 
  • Participates in all internal Dosimetry and multidisciplinary meeting at the center, focusing on continuous quality improvement. 
  • Participates in quality check lists as source of intra-center communication. 
  • May act as teacher/instructor during orientation phases of new dosimetry hires. 
  • Ensures that all procedures are followed, verified and QA’d as they relate to the outsourcing or treatment devices, acceptance of said devices at the center, and implementation of said devices during patient treatment. 
  • Adheres to treatment protocol standards established by Seattle Proton Center for specific disease sites/stages/fields, and ensures that documentation is thorough and captured electronically. 
  • Participates in the development and/or implementation of new techniques as assigned by Dosimetry Manager. 



  • Minimum 1 year experience as a Medical Dosimetrist preferred.  
  • RayStationXiOMIM, MOSAIQ experience preferred. 
  • Proton therapy experience preferred. 



  • Excellent computer skills. 
  • Excellent communication skills. 
  • Ability to work flexible hours, including occasional weekends to cover extended treatment times and to support center projects as needed. 
  • Ability to work under pressure. 
  • Teaching and coaching skills. 
  • Technical problem solving. 
  • Proficient in Microsoft Office products.



  • Cooperation/Building Collaborative Relationships 
  • Creativity/Innovation 
  • Competency/Dependability/Thoroughness 
  • Workflow Optimization/Efficiency 
  • Organization/Attention to Detail 
  • Flexibility/Managing Change 



  • Bachelor’s degree preferred, specifically in Radiation Therapy, Math, or Physics.   
  • Must be a graduate of a JRCERT accredited medical dosimetry program or have at least 2 years of on the job training as a medical dosimetrist.   
  • CMD strongly preferred, and if not, must be board eligible. Must be board-certified within 3 years of employment.  



  • Seattle Proton Center utilizes RFID (Radio-Frequency IDentification) tags at the centers for the purposes of analysis of productivity and patient throughput.  This information is not for use as a management tool for employee performance issues. 


SCCA has a mandatory COVID-19 vaccination policy, and there are no exceptions for any employee who is patient-facing and/or requires access to SCCA facilities.

Exceptions exist only for employees whose positions are fully remote, with no required access to campus. As a condition of employment, newly hired employees requiring access to campus must provide proof of vaccination before their first day of employment.

Our Commitment to Diversity

We are proud to be an Equal Employment Opportunity (EEO) and Vietnam Era Veterans Readjustment Assistance Act (VEVRAA) Employer. We are committed to cultivating a workplace in which diverse perspectives and experiences are welcomed and respected. We do not discriminate on the basis of race, color, religion, creed, ancestry, national origin, sex, age, disability (physical or mental), marital or veteran status, genetic information, sexual orientation, gender identity, political ideology, or membership in any other legally protected class. We are an Affirmative Action employer. We encourage individuals with diverse backgrounds to apply and desire priority referrals of protected veterans. If due to a disability you need assistance/and or a reasonable accommodation during the application or recruiting process, please send a request to our Employee Services Center at or by calling 206-667-4700.


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