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PSD News


PSD Celebrates 25th Anniversary With Company Retreat in Ithaca, NY

This year, PSD celebrates its 25th Anniversary! The company recently gathered in Ithaca, NY, to…
Knowledge Base

The Power of Energy Codes Featured in Scientific American

As illustrated by a recent article in Scientific American, energy codes are receiving increasing national attention…

PSD Going Back to Cali for the 2023 RESNET® Conference

PSD is heading to San Diego, CA, for the 2023 RESNET® Conference! Cindy Zeis, Emelie Cuppernell Glitch, and Ethan…

All PSD News

PSD Happy Holidays Christmas

Happy Holidays From PSD

By News

In the spirit of the holiday season, PSD donates to Earthjustice! Watch the video to learn more from PSD’s John Davis and Kathy Greely. We wish you and yours a…

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PSD - USA army soldiers saluting on a background of USA flag. Greeting card for Veterans Day, Memorial Day, Independence Day.

Veterans Day 2022

By News

This year we reached out to our PSD team and asked if our veterans or their family members would be interested in sharing more about their experience. We received several…

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PSD CEO Kathy Greely

PSD Appoints Kathy Greely as New CEO

By News

Ithaca, NY – Performance Systems Development (PSD), a building science technology and services company, has appointed Kathy Greely as the new CEO. An experienced industry leader, Ms. Greely will succeed…

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Energy Efficiency Day 2021

By Holiday, News

Today is Energy Efficiency Day! Since 2016, on the first Wednesday in October, a collaborative effort of dozens of energy efficiency advocacy groups around the United States have celebrated Energy Efficiency Day! The message of…

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Energy Programs

Designing and implementing cost-effective performance-based energy efficiency programs.

Program QA

Leading provider of QA services supporting energy efficiency programs throughout the country.


PSD Compass is a configurable enterprise solution for energy efficiency programs and implementers.


Technology for large-scale electrification, Heat Pump + Retrofit Toolkit, standardized simulations and tools.

Energy Codes

Expert technical leadership achieving decarbonization, cost-effectiveness, resilience, and equity goals.

HERS Provider

Accredited Home Energy Rating Provider, offering nationwide technical support and services.


Moving the industry forward with PSD’s intimate knowledge of how buildings work.


Join our growing team of energy efficiency professionals to help us save energy to save the planet.