Radiation Therapist Jobs in California
Radiation Therapist jobs in California are among the most active in the country, concentrated in hospital-based oncology departments, cancer treatment centers, and large outpatient radiation facilities, with openings at every level from new graduate through senior and lead therapist. The highest volume of hiring runs through Los Angeles, San Francisco, and San Diego, where established systems like Cedars-Sinai, Sutter Health, and UC San Diego Health maintain ongoing demand. Stereotactic radiosurgery, image-guided radiation therapy, and proton therapy are the most in-demand specializations across California cancer centers. Find a role that fits below and apply directly.
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Showing 5 of 32+ Radiation Therapist jobs
Overview:
The US Oncology Network believes local cancer care is better care and in 2017 Vantage Oncology joined The US Oncology Network. The US Oncology Network empowers the delivery of advanced integrated cancer care through our network of independent physicians who share expertise and resources to provide quality, value-based care close to home. Our clinical and business support capabilities, expertise and industry-leading technologies keep local practices at the forefront of high quality, efficient care delivery while enabling practice success, quality of life and financial security for physicians.
We have an immediate opening for a PRN Radiation Therapist at our City of Hope locations.
Salary:
- RTT I: $47.74 - $64.44
- RTT II: $56.75 - $76.61
- RTT SR: $63.63 - $85.90
Applicants will be hired into the appropriate title based on their credentials and years of experience applicable.
SCOPE: Under direct supervision, administers radiation therapy treatments to patients. Accuracy in positioning the beam of radiation to correspond with the designated tumor volume and accurately delivering the prescribed dose are paramount job functions. Supports and adheres to the US Oncology Compliance Program, to include the Code of Ethics and Business Standards.
Responsibilities:
- Accurately delivers and records radiation therapy treatments under the direction of a radiation oncologist and chief radiation therapist.
- Accurately enters and maintains patient treatment parameters into electronic medical record.
- Participates in clinical instruction of newly hired therapists and students.
- Assists in maintaining patient appointment schedule and submitting correct billing information.
- Accurately cuts blocks, when applicable.
- Accurately makes custom molds.
- Accurately completes simple mu calculations.
- Accurately interprets a computerized treatment plan.
- Maintains clean, safe, and organized work environment.
MINIMUM QUALIFICATIONS:
- Graduate of an accredited radiation therapy technology program.
- ARRT certification required. Must hold valid state license for radiation therapy.
- Halcyon and IX Linac experience preferred.
- Radiation Therapist I: requires 0-3 years of experience.
- Radiation Therapist II: requires 3-5 years of experience actively practicing as an RTT.
- Senior Radiation Therapist: requires 5+ years of experience actively practicing as an RTT.
PHYSICAL DEMANDS: The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee is regularly required to sit and use hands to finger, handle, or feel. The employee is occasionally required to stand, walk, and reach with hands and arms. The employee must occasionally lift and/or move up to 30 pounds. Requires vision and hearing corrected to normal ranges.
WORK ENVIRONMENT: The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Work is performed in an office environment and requires significant interaction with management, staff and external auditors and clients.
Applicants will be hired into the appropriate title based on their credentials and years of experience applicable.
Overview:
The US Oncology Network believes local cancer care is better care and in 2017 Vantage Oncology joined The US Oncology Network. The US Oncology Network empowers the delivery of advanced integrated cancer care through our network of independent physicians who share expertise and resources to provide quality, value-based care close to home. Our clinical and business support capabilities, expertise and industry-leading technologies keep local practices at the forefront of high quality, efficient care delivery while enabling practice success, quality of life and financial security for physicians.
We have an immediate opening for a PRN Radiation Therapist at our City of Hope locations.
Salary:
- RTT I: $47.74 - $64.44
- RTT II: $56.75 - $76.61
- RTT SR: $63.63 - $85.90
Applicants will be hired into the appropriate title based on their credentials and years of experience applicable.
SCOPE: Under direct supervision, administers radiation therapy treatments to patients. Accuracy in positioning the beam of radiation to correspond with the designated tumor volume and accurately delivering the prescribed dose are paramount job functions. Supports and adheres to the US Oncology Compliance Program, to include the Code of Ethics and Business Standards.
Responsibilities:
- Accurately delivers and records radiation therapy treatments under the direction of a radiation oncologist and chief radiation therapist.
- Accurately enters and maintains patient treatment parameters into electronic medical record.
- Participates in clinical instruction of newly hired therapists and students.
- Assists in maintaining patient appointment schedule and submitting correct billing information.
- Accurately cuts blocks, when applicable.
- Accurately makes custom molds.
- Accurately completes simple mu calculations.
- Accurately interprets a computerized treatment plan.
- Maintains clean, safe, and organized work environment.
MINIMUM QUALIFICATIONS:
- Graduate of an accredited radiation therapy technology program.
- ARRT certification required. Must hold valid state license for radiation therapy.
- Halcyon and IX Linac experience preferred.
- Radiation Therapist I: requires 0-3 years of experience.
- Radiation Therapist II: requires 3-5 years of experience actively practicing as an RTT.
- Senior Radiation Therapist: requires 5+ years of experience actively practicing as an RTT.
PHYSICAL DEMANDS: The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee is regularly required to sit and use hands to finger, handle, or feel. The employee is occasionally required to stand, walk, and reach with hands and arms. The employee must occasionally lift and/or move up to 30 pounds. Requires vision and hearing corrected to normal ranges.
WORK ENVIRONMENT: The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Work is performed in an office environment and requires significant interaction with management, staff and external auditors and clients.
Applicants will be hired into the appropriate title based on their credentials and years of experience applicable.
See All 32 Radiation Therapist Jobs in California
Find roles in California that match your experience and apply in just a few clicks.
Find Radiation Therapist JobsRadiation Therapist Jobs by City in California
Where California roles are concentrated, by current openings.
Radiation Therapist Job Market in California
A snapshot from current California openings, updated as new roles post.
Who's Hiring
- City of Hope10
- CommonSpirit Health7
- Sutter Health6
- Dignity Health3
- Cardinal Health2
Top Industries Hiring
- Healthcare & Medical Services18
- Science & Research9
- Biotechnology & Pharmaceuticals2
- Consulting & Professional Services1
- Distribution & Wholesale1
What California Employers Look For
The qualifications that appear most often in radiation therapist jobs across California.
- Active California Radiation Therapist license issued by the California Department of Public Health
- ARRT certification in Radiation Therapy required or eligible to sit for the exam
- Associate or bachelor's degree from a JRCERT-accredited radiation therapy program
- Proficiency with linear accelerator operation and treatment planning systems such as Eclipse
- Experience with ARIA or Mosaiq oncology information systems preferred by most California employers
- Current BLS certification through the American Heart Association required at time of hire
Radiation Therapist Jobs in California: Frequently Asked Questions
How do you become a radiation therapist in California?
You must hold an active California Radiation Therapist license issued by the California Department of Public Health, Radiologic Health Branch. To qualify, you need to complete an accredited radiation therapy program at the associate or bachelor's level and pass the ARRT certification examination in Radiation Therapy. California does not accept reciprocity from other states, so out-of-state therapists must apply directly to the Radiologic Health Branch for a California license before practicing.
How much do radiation therapists make in California?
Radiation therapists in California earn a median of about $166,450 a year, based on May 2025 Bureau of Labor Statistics wage data, ranging from around $130,150 for the lowest 10% to over $208,100 for the top 10%. Pay rises with experience, specialty, and employer.
Which companies hire radiation therapists in California?
Employers hiring radiation therapists in California right now include City of Hope, CommonSpirit Health, and Sutter Health, based on current listings on Migrate Mate as of June 2026. California's large integrated health systems and NCI-designated cancer centers tend to post the most consistent openings, particularly for therapists trained on advanced delivery platforms.
Which California cities have the most radiation therapist jobs?
Merced, Stockton, and Modesto have the most radiation therapist openings in California. Los Angeles dominates due to the density of major health systems and freestanding cancer centers, while San Francisco and San Diego benefit from large academic medical centers and proximity to research-driven oncology programs that maintain year-round staffing needs.
Are there remote radiation therapist jobs in California?
Yes, but they're rare. Radiation therapy is an inherently hands-on clinical role requiring direct patient contact and operation of treatment equipment, so remote work is not a realistic option for most positions. About 0% of radiation therapist openings tied to California are remote or hybrid as of June 2026, and those roles typically involve dosimetry consultation, quality assurance review, or administrative oversight rather than direct patient treatment.
How can I get hired as a radiation therapist in California with little or no experience?
The most realistic entry path is applying for new-graduate positions at large California health systems that run structured orientation programs, including UC Health campuses and Kaiser Permanente facilities across Northern and Southern California. These employers regularly hire ARRT-eligible new graduates and provide supervised clinical onboarding. Candidates coming from radiologic technology or dosimetry roles have a natural lateral path in. Having your California Radiologic Health Branch application submitted before your first interview significantly strengthens your candidacy.
Where can I find and apply to radiation therapist jobs in California?
You can find and apply to radiation therapist jobs in California on Migrate Mate, which lists current openings across the state. Find the roles that fit your experience and credentials below and apply directly to the ones that match.
See All 32 Radiation Therapist Jobs in California
Find roles in California that match your experience and apply in just a few clicks.
Find Radiation Therapist Jobs