Contacts & Services

Jason Allen provides services for Waste Disposal processing.
Location: All Buildings in Medical School Campus
Cell Phone: (314)-288-5095

Services: Clinical Radioactive Material Use, X-Ray Producing Machines

Mashael Almowallad is an experienced Medical Health Physicist with over 12 years of expertise in radiation safety, regulatory compliance, and quality assurance in healthcare. Her work spans diagnostic and nuclear medical physics, radiation protection, and MRI safety, ensuring the highest safety and performance standards in medical imaging and radiation use.

Mashael’s journey in medical physics began in Jeddah, Saudi Arabia, where she completed her early education before earning her Bachelor of Science in Nuclear Medicine Technology from Saint Louis University and a Master of Science in Health Physics from the Illinois Institute of Technology. She holds multiple board certifications in nuclear medicine, radiation safety, MRI safety, and laser safety, reflecting her dedication to advancing medical physics and radiation protection. Throughout her career, Mashael has played a crucial role in radiation risk assessment, regulatory compliance, and training healthcare professionals in radiation safety and imaging techniques. She has worked extensively with radiopharmaceuticals, PET/CT, and x-ray quality assurance programs, ensuring compliance with industry regulations and optimizing imaging procedures for patient safety and diagnostic accuracy.

Mashael is an active member of several professional organizations, including the Health Physics Society, the Society of Nuclear Medicine and Molecular Imaging, the American Association of Physicists in Medicine (AAPM), and Women in Nuclear (WiN) Global. Her leadership and expertise contribute to ongoing advancements in medical physics and radiation protection. Currently, Mashael continues to drive excellence in radiation safety programs, regulatory compliance, and medical imaging quality assurance. Her passion for safety and education fosters a collaborative approach to enhancing patient care and medical technology standards.

Rebecca Andrews provides support for Lab & Chemical Safety related services, specifically Lab Safety Inspection, Fume Hood Inspection and Lab Safety Training.

Areas Supported

Medical Campus: Cancer Research Building, Cortex, East Building,  East Building Imaging Center, East McDonnell Facility, McDonnell Medical Sciences Building, Southwest Tower

Services: Laser Safety; Radioactive Waste Pickup and Disposal; Radioactive Material Orders; Survey Meter Calibration

Mitch Burger provides support for Workplace Safety related services. Specifically, ergonomic evaluation, respiratory protection , facility maintenance training and workplace safety inspection.

Services: Radioactive Material Authorizations and Amendments; Drain Disposal of Radioactive Material; Radioactive Material Research Lab Inspections; Radiation Safety Training Information, Requirements, and Scheduling; Generally Licensed Radioactive Materials

St. Louis area native (southern Jefferson County) who has a B.S. and M.S. in Nuclear Engineering from Missouri University of Science and Technology in Rolla Missouri. After college, 4 years working for Knolls Atomic Power Laboratory as a Nuclear Physicist designing and building submarine and aircraft carrier reactors. In 2014 moved back to St. Louis and began a career in health physics working as a Health Physicist here at Wash U. During that time, specialized in several areas including launching/growing the Increased Controls, Magnet, General Licensed Materials, and Laser Programs. During time at Wash U began the accreditation program through the American Board of Health Physics (2 years of examinations) and became a Certified Health Physicist (CHP) in 2017. In January 2019 accepted a position at the University of Missouri Research Reactor as the Health Physics and Safety Manager/Radiation Safety Officer. MURR is the leading producer of Lu-177, I-131, Mo-99/Tc-99m, Y-90, and several other isotopes in the United States. In the position, led a team of ~40 safety professionals shipping upwards of 1.6 million patient doses per year (based on activity shipped). In January 2025 rejoined Washington University as the Director of Radiation Safety/Radiation Safety Officer.

Scott Florin manages and provides services for Waste Disposal processing, Recycling, and Compliance.
Location: All Buildings in Danforth Campus
Cell Phone: (314)-223-0147

Ndingsa provides support for BSL3 lab inspections and BSL3 respiratory protection training.

Christopher Grunwald provides support for Workplace Safety related services. Specifically ergonomic evaluation , respiratory protection, facility maintenance training and workplace safety inspection.

Lauren Gunther provides support for Lab & Chemical Safety related services, specifically Lab Safety Inspection, Fume Hood Inspection and Lab Safety Training.

Areas Supported:

Medical Campus: CSRB, NRB

Angela Hall provides support for Biological and Clinical Safety related services, specifically Clinic Safety Inspection, IBC Protocol review.

Phil Hellman provides services for Waste Disposal processing.
Location : All Buildings in Danforth Campus
Cell Phone: (314)-935-9351

Livi Isringhausen manages and provides services for Waste Disposal processing, Recycling, and Compliance.
Location: All Building in Medical School Campus
Cell Phone: (314) 602-8551

Services: Clinical Radioactive Material Use

Services: Radioactive Material Package Receipt; Radioactive Waste Pickup and Disposal

Services: Radioactive Material Orders/Shipping/Transfers; Radioactive Waste Pickup and Disposal; Survey Meter Calibration and Repair; Bioassays

Works for the Radiation Safety Department as a lead in several programs. Lead in Cyclotron and Radiopharmacy radiation safety, Waste management, receiving and shipping of radioactive materials, technical measurements, calibration of radiation detectors, Bioassay and assists in other areas as needed. Assisting our customers and affiliate to stay in compliance with federal regulations involving the use of radioactive materials.

Brad King provides support for Workplace Safety related services.Specifically, facility maintenance training , respiratory protection and workplace safety inspection.

Jon Kruyne provides support for Workplace Safety related services. Specifically, ergonomic evaluation, respiratory protection , maintain Workday Respiratory database, facility maintenance training and workplace safety inspection.

Services: Clinical Radioactive Material Use; ALARA Investigations

Services: Clinical Radioactive Material Lab Inspections; Clinical Radioactive Material Use; Radioactive Sealed Sources; MRI Support

David L. Luechtefeld is an experienced radiation safety professional with over 25 years of expertise in regulatory compliance, radiation protection, and medical health physics. Currently serving as the Assistant Radiation Safety Officer (RSO) at Washington University School of Medicine, he provides leadership and oversight for human-use radioactive material (RAM) programs, sealed source management, MRI safety, and medical radiation audits.
With a strong background in radiation safety inspections, dosimetry investigations, and regulatory compliance, David plays a critical role in ensuring the safe and responsible use of radioactive materials within the Washington Medical Center. His extensive experience includes emergency spill response, shielding evaluations, and personnel training in radiation safety protocols.
David holds a Bachelor of Science in Engineering Physics from Missouri State University and an Associate of Science in Pre-Engineering from East Central College. He is a certified Qualified Expert in Radiation Safety (QE350) and has been instrumental in developing safety protocols, reviewing authorization permits, and maintaining compliance with federal, state, and local regulations. His commitment to excellence and expertise in radiation safety make him a key asset to the institution’s health and safety programs.

Rick Luhman provides support for Chemical Inventory System, specifically SDS maintenance, compliance analytics and developing training content.

Mark Mills provides support for Lab & Chemical Safety related services, specifically Lab Safety Inspection, Fume Hood Inspection and Lab Safety Training.

Areas Supported

Danforth Campus: Brauer Hall, Bryan Hall, Compton Hall, Crow Hall, Danforth Cyclotrons (MASS SPEC), George McMillen Laboratory, Green Hall, Jolley Hall, Louderman Hall, McMillan Hall, Rudolph Hall, Radiochemistry Building, Urbauer Hall, Whitaker Hall, Wrighton Hall

Medical Campus: 4444 Forest Park Blvd, Barnard Hospital, CSRB-North Tower, Cyclotron Areas, Irene W Johnson Institute Rehab, South Medical Building, West building

Anthony Nardi is the respiratory protection program manager. He also provides support for Workplace Safety related services like ergonomic evaluation , and workplace safety inspection.

Nick Olson provides services for Waste Disposal processing.
Location: All Buildings in Medical School Campus

Paula Rapp provides support for Biological and Clinical Safety related services, specifically Clinic Safety Inspection and Training.

Services: Clinical Radioactive Material Use; Radioactive Material Authorization Review

Services: Decommissioning & Closeouts; Radioactive Materials Authorization Inspection & Review.

Position provides support for Lab & Chemical Safety related services, specifically Lab Safety Inspection, Fume Hood Inspection and Lab Safety Training.

Areas Supported

Danforth Campus: Bayer Laboratory, Busch Laboratory, JG Plant Growth Building and Greenhouse, Life Sciences Building, McDonnell Hall, Rebstock Hall, Somers Family Hall, Wilson Hall

Medical Campus: 4511 FP Medical Building, Biotechnology Center, Central Institute for the Deaf Clinic & Research Building, McDonnell Pediatric Research Building, McMillan Hospital, Wohl Clinic, Wohl Hospital

Adam Thompson provides support for Lab & Chemical Safety related services, specifically Lab Safety Inspection, Fume Hood Inspection and Lab Safety Training.

Areas Supported:

Medical Campus: BJCIH, BJCIH Vertical Expansion, Couch Building and North Building

Services: Radioactive Materials Bioassay Records; Dosimetry

Trina Whitener provides services for Waste Disposal processing.
Location: All Buildings in Medical School Campus

Services: Radioactive Material Ordering; Radioactive Material Waste Billing