Jobs › HSHS

Radiation Therapist - PRN

HSHS · O'Fallon, IL · $34.21–$51.31 an hour · Part time

Posted Jul 9, 2026 · We last checked this listing on Oct 6, 2026

Apply at HSHS

Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you caught an error before it reached a patient.

What they are checking: Whether they speak up about safety, which is the core of this job.

How do you support a patient who is anxious about their first treatment?

What they are checking: Whether they provide the compassionate care the posting stresses, alongside technical skill.

What would you do

A patient's position doesn't match the plan and you can't correct it. What do you do?

What they are checking: Whether they stop treatment and escalate rather than treating a setup they are unsure about.

A patient is losing weight and their mask no longer fits well. What do you do?

What they are checking: Whether they recognize that anatomy changes affect accuracy and bring in the right team.

As a PRN therapist, how do you stay current on the equipment and protocols when you're not there every week?

What they are checking: Whether they take responsibility for staying competent between shifts.

About the work

This PRN role at the O'Fallon Cancer Center covers CT simulation and linear accelerator treatment. Walk me through a CT simulation from start to finish.

What they are checking: Whether they can set up reproducible positioning and immobilization, which every later treatment depends on.

What checks do you do before delivering each treatment?

What they are checking: Whether they follow a disciplined time-out and verification process that prevents treatment errors.

How do you use daily imaging to decide whether a patient's setup is acceptable?

What they are checking: Whether they understand image guidance tolerances and when to stop and get a physicist or physician.

What side effects do you watch for in patients getting radiation to the head and neck?

What they are checking: Whether they notice treatment reactions and report them to nursing or the physician.

Are your ARRT registration and IEMA accreditation current?

What they are checking: Whether they meet the Illinois credentialing requirements to practice.

Practice this interview out loud.

Offer builds a real interview for this exact role at HSHS from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

Practice this out loud

The full job description

As published by HSHS.

Pay Range: $34.21 - $51.31 A successful candidate's actual pay rate will be based on several factors including relevant experience, skills, training, certifications and education. Hospital Sisters Health System (HSHS) is seeking a PRN Radiation Therapist to join our Radiation Oncology team. This role provides compassionate, patient-centered care while delivering safe and accurate radiation treatments as part of a collaborative oncology care team.The Radiation Therapist is responsible for the simulation and administration of radiation therapy treatments using CT simulation technology and linear accelerator equipment while following treatment plans prescribed by radiation oncologists. Position Specifics: o Department: Radiation/Oncology o Core Function: Rehab/Therapy/Sleep o Schedule: PRN - 8a-430pm is standard shift but by vary due to pt. volume, no weekend, call or holiday responsibilites o Facility: O'Fallon Cancer Center o Location: O’Fallon, IL o Compensation aligned with your experience For more information regarding this position, please contact Lauren Aman at lauren.aman@hshs.org. Education Qualifications • Associates in Radiation Therapy or graduate of an accredited Radiation Therapy program is required. • Bachelor of Science in Radiation Therapy is preferred. • Associates Degree required for those graduating from Radiation Therapy program after 12/31/14. Experience Qualifications • One year experience in Radiation Therapy is preferred. Certifications, Licenses and Registrations • IEMA-Radiation Therapy (Illinois Emergency Management Association) is required in Illinois. • Basic Life Support (BLS) is required within 30 days of hire. • ARRT registered in radiation therapy or successful completion of a Radiation Therapy program and eligible to take the certification exam in Radiation Therapy as defined by the American Registration of Radiologic Technologist (ARRT). Colleague must complete and pass a certification and registration exam in accordance with the eligibility requirements of ARRT within one year of hire. Job Description Scheduled Weekly Hours: 0 Throughout communities in Illinois and Wisconsin, 13 hospitals, numerous community-based health centers and clinics, our 13,000+ colleagues have built a culture based on our solid core values of respect, care, competence, and joy. These are the ideals we believe in, work by, and live each day. Built upon more than 145 years of service to the communities we serve, we now look to the future and our place in it as a health care system that strives to continually improve processes, procedures, and outcomes with the latest and most advanced technologies and treatments. Regardless of how far our passion for excellence carries us, our focus will always remain on the most important person in our entire organization: The patient. Benefits: HSHS provides a benefits package designed to support the overall well-being of our colleagues including their physical, emotional, financial, spiritual, and work health. Colleagues budgeted to work at least 32 hours per pay period are eligible for HSHS benefits. • Comprehensive and affordable health coverage includes medical, prescription, dental and vision coverage for full-time and part-time colleagues. • Paid Time Off (PTO) combines vacation, sick, and personal days into one balance to allow you the flexibility to use your time off as you need. • Retirement benefits including HSHS contributions. • Education Assistance benefits include up to $5,250 of educational assistance each calendar year and tuition discounts to select colleges with no waiting period. • Adoption Assistance provides financial support up to $7,500 for colleagues growing their families through adoption to reimburse application and legal fees, transportation, and more! • Other benefits include: Wellness program with incentives, employer-paid life insurance and short-term and long-term disability coverage, flexible spending accounts, employee assistance program, ID theft coverage, colleague rewards and recognition program, discount program, and more! Benefits HSHS and affiliates is an Equal Opportunity Employer (EOE). HSHS is proud to be an equal opportunity workplace dedicated to pursuing and hiring a diverse workforce. Notice Regarding Potential Use of Artificial Intelligence in the Hiring Process Hospital Sisters may use automated tools, including artificial intelligence or machine-learning technologies, to assist with certain administrative aspects of the recruitment process. These tools may help our recruiting team organize applications, search for resumes, identify qualifications reflected in application materials, and facilitate communications or scheduling with applicants. Information used by these tools may include materials you provide during the application process, such as your resume, work history, education, qualifications, and responses to application questions. These tools are used only to support our recruiting process. Hiring decisions are made by HSHS personnel, and automated tools do not make employment decisions on behalf of HSHS. Applicants who have questions about this notice or who require a reasonable accommodation or alternative evaluation method may contact HSHS Human Resources at Contact@hshs.org

Apply at HSHS

More radiation therapist roles