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About the International Radon Association was established in 1998 as a resource for the public to learn about radon, its health effects, and to connect homeowners with radon professionals. Since then, the International Radon Association was established with the goal of connecting radon professionals together in an effort to further our mission of saving lives. The International Radon Association provides resources for radon professionals to provide the highest level of service to the communities they serve.

The International Radon Association’s purpose is to educate the public about the dangers of radon, connect homeowners and radon professionals, and support radon professionals. If you are looking for a radon professional, visit our Find a Radon Pro page.


Sean A. Williford

Executive Director

Sean is certified as a Radon Measurement Professional by the National Radon Proficiency Program (NRPP), a Radon Measurement Specialist by the National Radon Safety Board (NRSB), a member of the American Association of Radon Scientists and Technologists (AARST) and member of the Rocky Mountain Chapter of AARST (RMAARST.) Sean graduated from the Metropolitan State University of Denver with a Bachelor of Science and later attended Harvard Business School Online for post-graduate studies. Additionally, Sean is the owner of Spin Radon, a radon measurement business in Northern Colorado. 

Angela King

Board Member

Bio coming soon.

Kara Marshall

Board Member

Bio coming soon.