Joelle Jahn
CPHC®, LEED AP BD+C, LFA
Energy Engineering, Mechanical Engineering, Sustainability Consulting
- 6.5M GSF
- 2 Projects
- 10 Year Career
About
I believe the future goes beyond sustainability—it's about embracing regenerative design to create systems that actively restore and enhance our world, ensuring a resilient, equitable, and decarbonized legacy for generations to come.
Joëlle Jahn is the New England Leader of JB&B’s Deep Carbon Reduction Group based in the Boston office. With expertise in organizing and managing data, she helps clients achieve net-zero energy and carbon goals.
Her work spans master planning, higher education, science and technology, multifamily residential, and cultural projects. She has led sustainability permitting for over 20 million square feet in Boston and Cambridge, including decarbonization studies, envelope analysis, electrification strategies, and certifications like WELL, LEED, and Passive House.
Joëlle advises on Boston’s Zero Net Carbon Zoning Code, co-chairs Built Environment Plus’s Carbon & Energy Roundtable, and is published by IBPSA on passive strategies for climate-responsive design. She has been a guest lecturer at the BSA, Wentworth, Northeastern, and Cornell University. She holds a BS in Environmental Design from Cornell University and a Master’s in Energy and Environment from Harvard.
Experience
Building Types
- Healthcare
- Laboratory / Tech / Science
- Mixed Use
- Office
- Residential: Multi-family
Achieved Project Certifications
- LEED
- LEED ZERO
- ILFI Zero Carbon Certification
- ILFI Zero Energy Certification
- PHI
- PHIUS
Awards
- ASHRAE LowDown Showdown Modeling Competition, 1st Place and Fan Favorite Award, 2019
Publications
- “Tempering the Temporary: Improving Thermal Comfort and Human Well-Being in Relief Shelters”, Building Simulation 2019 Conference Paper, September 2019
Recent Speaking Engagements
- Speaker, “Smart, Resilient, Decarbonized: Making the Case for Grid Interactive Buildings”, Greenbuild International Conference, November 2024
- Speaker, “Built Environment Plus Emerging Professionals Roundtable”, BE+, October 2024
- Moderator, “Carbon & Energy Special Roundtable”, Built Environment Plus (BE+), July 2024.
- Panelist, “Pragmatic Solutions to Building Decarbonization in Boston”, Decarb Boston 2024, June 2024
- Moderator, “Carbon & Energy Roundtable”, Built Environment Plus (BE+), May 2024
- Guest, “Stretching to Reach Energy Efficiency and Energy Use Reduction”, Energy, Environment Economy Podcast, Environmental Business Council of New England, Inc., April 2024
- Panelist, “Prioritizing Building Decarbonization & Energy Reduction”, Building a Sustainable Boston Conference, Bisnow, April 2024
