Senior Nuclear Engineer / Health Physicist

Theragenics; Buford (GA); On-site; USD 110,000 - 160,000; Full time

Job summary

Theragenics seeks a Senior Nuclear Engineer / Health Physicist to lead radiation engineering efforts in radiopharmaceutical manufacturing. You will design and validate radiation safety systems, model shielding and dose, and support regulatory compliance across manufacturing operations.

Join a team applying advanced nuclear engineering to innovative healthcare technologies, contributing to safe, compliant, and efficient production of cancer therapies on a global scale.

Qualifications

• MS or PhD in Nuclear Engineering, Health Physics, Nuclear Physics, Medical Physics, or related discipline.
• 5+ years of experience in radiation engineering, shielding design, health physics, or nuclear engineering environments.
• Proficiency with MCNP or equivalent Monte Carlo radiation transport software, including model development and results interpretation.
• Experience performing shielding analyses, source term development, and radiation dose calculations.
• Strong analytical and problem-solving skills; excellent technical writing and communication abilities.
• Ability to collaborate across multidisciplinary teams.

Responsibilities

• Perform radiation shielding analyses, dose assessments, and source term calculations.
• Develop, validate, and interpret Monte Carlo radiation transport models using MCNP or equivalent software.
• Support facility, hot cell, process equipment, and radiological system design activities.
• Provide radiation engineering expertise during commissioning, qualification, and manufacturing readiness.
• Prepare engineering calculations, technical reports, design specifications, and engineering standards.
• Evaluate and optimize radiation detection systems, including HPGe spectroscopy applications.
• Participate in design reviews, hazard analyses, and project risk assessments.
• Support regulatory submissions and provide technical expertise during inspections and audits.
• Collaborate with multidisciplinary teams to solve complex technical and operational challenges.
• Drive continuous improvement initiatives related to radiation safety and facility performance.

Skills

Analytical skills

Technical writing

Cross-disciplinary collaboration

Education

MS/PhD in Nuclear Engineering or Health Physics

Tools

MCNP

Job description

Join Theragenics as a Senior Nuclear Engineer / Health Physicist and help advance the future of radiopharmaceutical manufacturing. In this impactful role, you'll serve as the primary radiation engineering expert supporting the development of next-generation technologies used in life‑saving cancer treatments. From facility design and radiation modeling to regulatory support and manufacturing readiness, you'll play a vital role in bringing innovative healthcare solutions to patients worldwide. If you're passionate about applying advanced nuclear engineering principles to real‑world challenges, this is your opportunity to make a meaningful difference.

Company Overview

At Theragenics, we're passionate about transforming healthcare and enhancing patient outcomes. Our commitment to innovation drives us to push the boundaries of what's possible, ensuring a brighter future for patients everywhere.

Theragenics is a leader in developing medical devices that focus on minimally invasive treatments for cancer, vascular interventions, and surgical applications. Headquartered in Atlanta, Georgia, with facilities in Costa Rica, Texas, and Massachusetts, Theragenics proudly operates Arrotek, a premier medical device design consultancy in the U.S. and Ireland dedicated to pioneering solutions that improve lives.

Role Summary

As a Senior Nuclear Engineer / Health Physicist, you'll play a pivotal role in supporting the design, development, commissioning, and operation of innovative radiopharmaceutical manufacturing technologies. Working closely with cross‑functional teams across Engineering, Manufacturing, Quality, Validation, Process Development, and Regulatory Affairs, you'll apply advanced radiation engineering expertise to ensure safe, compliant, and efficient operations.

Key Responsibilities

• Perform radiation shielding analyses, dose assessments, and source term calculations.
• Develop, validate, and interpret Monte Carlo radiation transport models using MCNP or equivalent software.
• Support facility, hot cell, process equipment, and radiological system design activities.
• Provide radiation engineering expertise during commissioning, qualification, and manufacturing readiness initiatives.
• Prepare engineering calculations, technical reports, design specifications, and engineering standards.
• Evaluate and optimize radiation detection systems, including HPGe spectroscopy applications.
• Participate in design reviews, hazard analyses, and project risk assessments.
• Support regulatory submissions and provide technical expertise during inspections and audits.
• Collaborate with multidisciplinary teams to solve complex technical and operational challenges.
• Drive continuous improvement initiatives related to radiation safety, facility performance, and operational effectiveness.

Qualifications & SkillsRequired Qualifications

• M.S. or Ph.D. in Nuclear Engineering, Health Physics, Nuclear Physics, Medical Physics, or a related discipline.
• 5+ years of experience in radiation engineering, shielding design, health physics, or nuclear engineering environments.
• Demonstrated proficiency with MCNP or equivalent Monte Carlo radiation transport software, including model development and results interpretation.
• Experience performing shielding analyses, source term development, and radiation dose calculations.
• Strong analytical and problem‑solving skills.
• Excellent technical writing, documentation, and communication abilities.
• Ability to effectively collaborate across multidisciplinary teams.

Preferred Qualifications

• Experience in radiopharmaceutical manufacturing or isotope production environments.
• Knowledge of cyclotron facility operations and radiation systems.
• Experience utilizing HPGe gamma spectroscopy.
• Familiarity with cGMP‑regulated manufacturing environments.
• Experience supporting NRC or Agreement State licensed facilities.
• Experience with radiation transport and shielding software such as MicroShield, SCALE, PHITS, FLUKA, Geant4, MAVRIC, or similar tools.

Why Join Us?Career Growth

Expand your expertise while working on highly specialized nuclear engineering projects within a growing organization focused on innovation and advancement.

Innovative Projects

Contribute to the development of next‑generation radiopharmaceutical manufacturing technologies that directly impact patient care.

Collaborative Culture

Work alongside talented professionals across engineering, manufacturing, quality, regulatory affairs, and process development in a supportive team environment.

Competitive Benefits

Enjoy a comprehensive benefits package designed to support your health, well‑being, and professional success.

Purpose‑Driven Work

Help create the technologies and therapies that improve outcomes for cancer patients and make a lasting difference in healthcare.