2026 40 Under 40: Greg Smithmyer, PE, LEED AP BD+C, 40

Senior Project Engineer, Affiliated Engineers Inc.; MAE, The Pennsylvania State University

Greg Smithmyer is a mechanical engineering leader whose career reflects technical excellence, collaborative leadership and a dedication to service. Since joining Affiliated Engineers Inc. (AEI) in 2009, he has built a reputation for delivering complex solutions across science and technology, health care and higher education facilities. Known for his steady leadership and collaborative mindset, Smithmyer has earned the trust of clients, architects and contractors by guiding multidisciplinary teams through technically demanding projects while maintaining clear communication. His project experience includes major health care and research facilities across the United States. Among the most notable is the North Carolina State University Plant Sciences building, a 185,000-square-foot research facility that includes fully conditioned rooftop greenhouses and achieved LEED Gold certification through high-performance system integration. Smithmyer has also played key roles in facilities that employed integrated project delivery methods, requiring close collaboration among designers, contractors and owners to maintain design intent and system performance. Within his firm, Smithmyer is recognized as both a technical resource and a mentor. He leads the mechanical engineering group in Chapel Hill, North Carolina, supporting engineers across multiple offices while advancing firmwide initiatives to improve quality, training and engineering standards as a co-leader of AEI’s companywide mechanical team. Outside of work, Smithmyer dedicates time to community service and family activities. He volunteers with Habitat for Humanity, supports food security efforts through the Dorcas Food Pantry and Feed the Hunger and serves meals at organizations assisting individuals experiencing homelessness. He also enjoys spending time with his family through outdoor adventures, attending theater performances at the Durham Performing Arts Center and trying new wines with his wife.

Consulting-Specifying Engineer
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Consulting-Specifying Engineer

Consulting-Specifying Engineer provides engineering professionals working in nonresidential construction and retrofit applications with the most current and relevant content on topics like codes and standards, mechanical/HVAC and electrical systems, fire and life safety, building automation and other related technology.