2026 40 Under 40: Jeff Seger, PE, LEED AP BD+C, 39

Mechanical Engineering Discipline Leader, CannonDesign; BS, Architectural Engineering, University of Kansas

Soon after joining CannonDesign’s Chicago office in 2021, Jeff Seger led a team of 10 mechanical engineers to complete construction documentation for a 140,000-square-foot educational building at the University of Illinois at Urbana-Champaign pursuing LEED Platinum certification. He now co-leads construction administration for that project while continuing to support other campus initiatives, becoming a trusted partner to the university’s facilities and services team. Recently named mechanical discipline leader for the Chicago office, he helps guide staffing strategy, provides technical mentorship to engineers and works with project managers to ensure teams are positioned for success. He is also co-leading a firmwide initiative to strengthen internal continuing education programs for mechanical engineers. Seger began his career in Kansas City as a commissioning agent and LEED certification facilitator. Recognizing his potential as a design engineer, his supervisor introduced him to health care engineering, setting the direction for much of his career. Seger has contributed to several complex health care projects while at various firms, including the Spectrum Lakeland Medical Center Pavilion expansion and renovation, ThedaCare Neenah renovation and Resurrection Hospital’s surgical platform renovation. More recently, he has supported CannonDesign’s ongoing work with Mayo Clinic in Rochester, Minnesota, and the Heartland Whole Health Institute in Bentonville, Arkansas. Outside of project work, Seger regularly shares design insights through internal presentations and industry forums. He enjoys staying active through hiking, weightlifting, CrossFit and Hyrox — and balances those pursuits with his passion for cooking. His love for Legos completes the picture.

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.