This focused 2-hour course delivers the core knowledge every radon professional needs to communicate confidently and perform defensible measurement work. Participants revisit the fundamentals of radon science, clarify how radon enters and behaves in modern buildings, and explore why radon awareness continues to lag despite well-established health risks. The session concludes with practical guidance on interpreting results, explaining findings to clients, and strengthening professional practice. Ideal as a refresher or as an onboarding primer for new staff.