Medical Dosimetrist
Listed on 2026-03-05
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Healthcare
Radiation Therapist
Type of Recruitment
OPEN COMPETITIVE JOB OPPORTUNITY
Exam DetailsEXAM NUMBER: Y5773A
FILING
START DATE:
October 18, 2023 at 8:00 A.M. (PT)
The position is subject to closure without prior notice.
About Los Angeles County Department of Health ServicesThe Los Angeles County Department of Health Services (DHS) is the second largest municipal health system in the nation. Through its unified system of 23 health centers and four hospitals— and an expanded network of community partner clinics— DHS annually provides direct care for over 500,000 outstanding patients, employs over 23,000 staff, and has an annual budget of over $8.4 billion. DHS hospitals are training sites for physicians completing their Graduate Medical Education in nearly every medical specialty and subspecialty.
In addition to its direct clinical services, DHS also runs the Emergency Medical Services (EMS) Agency and the County’s 911 emergency response system, as well as Housing for Health and the Office of Diversion and Re‑entry, each with a critical role in connecting vulnerable populations, including those released from correctional and institutional settings, to supportive housing.
MISSION: To advance the health of our patients and our communities by providing extraordinary care.
ResponsibilitiesDevelops and implements radiation treatment plans using computer and/or manual computations to deliver the prescribed radiation dose and field placement technique in accordance with the radiation oncologist’s prescription.
- Identifies and contours normal and dose‑limiting structures by utilizing images from one or more data sets.
- Creates and transfers reference images and localization markers for portal verification and treatment delivery, including digitally reconstructed radiography (DRRs), cone beam computed tomography (CBCTs) and other image guided radiation therapy (IGRT) methods, as specified.
- Performs simulations and tumor localization using specified imaging devices including CT, MRI, and PET.
- Makes compensation filters, custom shields, wedges, and other beam‑modifying devices.
- Plans and implements the production of molds, casts, and other immobilization devices.
- Communicates with the radiation therapist(s) and assumes an advisory role in the implementation of the treatment plan, including the correct use of immobilization devices, compensators, wedges, field arrangement, and other treatment or imaging parameters.
- Performs calculations for the accurate delivery of the prescribed dose, documents all pertinent information in the patient record, and verifies the mathematical accuracy of all calculations by an approved method.
- Assists and supports the radiation oncology team in radiation safety and protection, qualitative machine calibrations, quality assurance of treatment plans and radiation oncology equipment.
- Operates and performs quality assurance, under the direction of the Medical Physicist, on the treatment planning computer(s).
- Applies specific methods of patient and/or beam dosimetry as directed by the Medical Physicist.
- Assists in brachytherapy procedures by performing treatment planning and dose calculations. May perform or assist in the receiving, loading, and shipping of radioactive materials.
- Utilizes radiation monitoring devices to measure radioactivity and perform assays.
- Teaches applied aspects of medical dosimetry to students, radiation therapists and residents.
- A valid and active certification as a Medical Dosimetrist issued by the Medical Dosimetrist Certification Board, State of California, Department of Health Services.
- Active California Class C Driver License or an alternative method of transportation when needed to carry out job‑related essential functions.
- All required licenses and certifications must be active and unrestricted or the application will not be accepted.
Points will be awarded for post‑certificate work experience as a Medical Dosimetrist.
Examination ContentThis examination will consist of an evaluation of experience and desirable qualifications weighted at 100%.
CANDIDATES MUST ACHIEVE A PASSING SCORE OF 70% OR HIGHER ON THE EXAMINATION IN ORDER TO BE PLACED ON THE…
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