Nathan Bearse
Multi Family Practice Lead

Nate has been interested in the building sciences for as long as he can remember. His father is the owner of a small residential construction company and is responsible for instilling in him the importance of quality and attention to detail in his work at an early age. He then pursued a degree in Architecture at Keene State College, where he discovered his love for sustainability and energy analysis through his coursework. He is a RESNET Certified HERS Rater, ICC Residential Energy Inspector/Plans Examiner, and LEED Green Rater. His goal is to help improve the construction industry, one building at a time.
Eric O'Connor
HERS Rater

Eric is a RESNET Certified HERS Rater and BPI certified and has previous experience in the energy efficiency field working for Mass Save providers and assessing existing homes all over eastern Massachusetts. He is a graduate of Boston University.
Ryan Finkst
Rating Field Inspector

Ryan is a RESNET Rating Field Inspector and is a LEED Green Rater. He has previous experience in the energy efficiency field working for another HERS Rating Company in Massachusetts. He is a graduate of UMass Amherst with a degree in Building Science and Technology as well as a Masters in Environmental Conservation.
Kevin Ring
Technical Lead - Residential Services

Kevin Ring has been a construction project manager and consulting owner’s representative for thirty years.  Project sizes range from the $50 million Kingsbury Hall at UNH to his own two deep energy retrofits in Medford.   He holds an engineering degree from the Massachusetts Institute of Technology; a Massachusetts Construction Supervisor’s License, a RESNET Certified HERS Rater, and an ICC Residential Energy Inspector/Plans Examiner.  As the creator of the “Building Envelope Hotline”, he is known for his keen listening, analytical and observational skills.  If there is a simple elegant solution you will hear it.  He is a member of the last class at Phillips Exeter Academy to use slide rules, and the first class at MIT to use spreadsheets.  He has also been a professional swing and ballroom dance performer and instructor since the 1980s.
Louanne Silvestro
Project Coordinator

Louanne is our project coordinator and keeps the office running smoothly. She handles phones, our site visit scheduling, invoicing, paperwork, Mass Save Administration and so much more.
Rucha Laulkar
Energy Modeler Co-op

Rucha is our current energy modeler co-op student from Northeastern University. She is learning the ins and outs of energy modeling in Ekotrope and occasionally joining raters for some testing in the field.
Ben Aulenback
Energy Modeler

Ben is our lead energy modeler. He works on analyzing architects plans and developing our initial energy models for the Projected HERCs. He is also involved with other energy modeling updates throughout the process. Ben has a passion for energy efficiency and building science.
Jang Yoon
Single Family Practice Lead

Jang Yoon was destined to be building scientist, an epiphany he has only recently realized.  A son of a civil engineer, his life revolved around buildings and structures before he could walk, and showed an early interest in how things are designed and constructed.  His interests led him on a varied path that covers antique Oriental rug restoration to manufacturing minimally invasive medical devices.  The common thread that ties his eclectic history is his love of aesthetics in relation to function.  He holds an engineering degree from Boston University, is a RESNET Certified HERS Rater, and an ICC Residential Energy Inspector/Plans Examiner.
Chris Zimmel

Chris has been passionate and interested in energy efficiency for many years. He first applied this interest while working at Florida Power & Light and subsequently helped businesses with energy efficiency programs for an energy consulting company in Massachusetts. He holds a Bachelor of Science in Finance from Bentley University, an MBA from Boston University, is a RESNET Certified HERS Rater, and an ICC Residential Energy Inspector/Plans Examiner.
Jeffrey Rhodin
President Emeritus

Jeff founded Sustainable Energy Analytics in 2008. He is a RESNET Certified HERS Rater, BPI Building Analyst, ENERGYSTAR® and IndoorAir® Plus Partner, ICC Residential Energy Inspector/Plans Examiner, and Lean Sigma Black Belt business improvement professional. He holds a degree in Operations Research and Industrial Engineering from Cornell University, College of Engineering. He formed Sustainable Energy Analytics to assist homeowners and builders meet the challenge of reducing energy consumption.