Brynn Cooksey Sr., affectionately known as the "Air Doctor," is a Detroit native and the Owner of Air Doctors Heating and Cooling, LLC. Brynn earned that nickname for his renowned engineering solutions in the HVACR and Electrical industries. After spending 15 years in the Utility Gas and Power industry, Brynn took over his family's heating and cooling business and rebranded it "Air Doctors" based on his industry-adopted nickname. The Air Doctors team has repeatedly reduced customers' utility bills by 50% or more with Brynn's award-winning Building Efficiency solutions.Brynn studied HVACR technology at Henry Ford College in Dearborn, Michigan, where he later returned to become a Professor and taught the subjects he had learned about. To this day, Brynn continues to train individuals in the industry that he loves and has trained over 10,000 HVAC Technicians, Electricians, and Energy Auditors. Brynn also is a training consultant for mechanical contractors, HVACR supply distributors, and HVACR training organizations. Brynn is a regular technical contributor for the RSES Journal, BPA Journal, and the RSES Webinar series. Brynn holds several degrees and certifications in the HVACR and Building Science industries.In 2024, Brynn was named one of ESCO Institute's Top 25 Most Influential HVACR Instructors. The honor was given to instructors who significantly contributed to the HVACR industry.Additionally, Brynn was named to the Air Conditioning Heating and Refrigeration News (ACHR News) Top 40 Under 40 Professionals list due to his contributions to the HVACR industry.