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6 | SEPTEMBER 2025 ASSOCIATION NEWS NATE BURDEN Radon Scientist/Consultant/Radon Activist With over 30 years of experience, Nate Burden has designed and installed more than 5,000 radon mitigation systems across residential, commercial, historical, and military properties. He has also performed specialized chemical vapor intrusion mitigation projects. and worked extensively with underserved communities through the MOVES Radon EJ Project. Nate serves on multiple boards and committees, including the AARST Foundation, CR3, PA DEP Radiation Protection Advisory Committee, the National Radon Action Program (NRAP), and the ANSI/AARST standards committees. He was awarded the 2021 Radon Hero Award by CRCPD and has supported DOD mitigation efforts in Germany, Italy, and the U.S. He studied physics and nuclear engineering at Carnegie Mellon University. INCUMBENT MICHAEL CHRISTOPHIDES Chief Inspector, Laboratory Director, Granite Inspection Group Michael brings more than 30 years of experience in residential and commercial inspections, environmental testing, and regulatory compliance. His expertise covers radon measurement and mitigation in air and water, indoor air quality, diagnostics, and system design across residential, multifamily, and public buildings. Michael has authored hundreds of protocols, SOPs, and remediation plans supporting quality and standardization across multiple disciplines. His broad educational background includes certifications in OSHA, HAZMAT, BPI, and NYSERDA, and he is a recognized voice in strategic planning, risk management, and policy development. He currently serves as a Director of the New York State Chapter and President of the New England Regional Chapter of IEA. Michael is respected for his multidisciplinary leadership and contributions to industry best practices. BOB COFFEE Owner and President, Your Environmental Services LLC Bob is the President of Your Environmental Services (YES), a certified drinking water laboratory and one of the largest radon testing firms in Indiana. With a degree in Marketing and a minor in Computer Science from Indiana University, Bob has built careers in both real estate and environmental services. He is a member of both the IEA Indiana chapter’s and IEA National’s Government Affairs Committees, chairs the AARST Radon Measurement Quality Assurance Standards Committee, and serves on the Water Standards Committee. He is known for his integrity, leadership, and entrepreneurial success in managing a multifaceted testing business. Outside of work, he enjoys golf, music, and travel, and recently became SCUBA certified at age 59. Bob is deeply involved in his church and community and credits his faith for guiding both his personal and professional paths. He shares his journey with his wife Dawn, and together they enjoy life with their eight children and eight grandchildren. WALT DONNAY Co-Owner, HSS Radon Services Walt began his career in real estate in 1996 before co-founding a construction company focused on new builds and remodels. In 2007, he entered the radon industry after attending a Minnesota state seminar, and by 2008, his company became one of the first to offer vapor intrusion mitigation services in the state. Walt now focuses on designing radon and vapor systems for new construction, working closely with architects and engineers to integrate solutions from the ground up. At HSS, he is dedicated to training the next generation of mitigators and testers to ensure lasting industry growth. Walt’s background in sales and customer service complements his technical expertise, making him a trusted resource for clients. His commitment to continuing education underscores his drive to serve both clients and the broader Minnesota community. DAWN GOARD Co-Founder/Partner, Goard Guards LLC Dawn is a seasoned executive with over two decades of leadership in environmental services and operations. She co-founded Goard Guards, LLC, where she consults with business owners on revenue optimization, exit strategies, and branding. Previously, she served as Executive Director of Operations at ACE Radon, scaling the business to national success and implementing performance-based pay systems, KPI tracking, and brand development. Dawn holds a B.S. in