Sustainable Investment Group - A sustainability consulting firm that provides environmentally focused solutions

Our Services

LEED Training & Education

SIG provides comprehensive training on a wide range of sustainability topics. We have developed many standard training courses and provide customized programs to meet the objectives and interests of your specific audience.


Learn how SIG helps grow the green building industry through education and training

Green Building Consulting

With offices in Atlanta, GA, Boulder, CO, Minneapolis, MN and New York, NY, SIG is a green building consulting firm whose team members bring years of experience in LEED, design-build commercial construction, real estate development, business efficiencies, and eco training.

Learn more about our LEED consulting services

Technical Services

SIG has in-house Technical Services Staff that hold credentials like PE, CxA, CEM, CPMP, LEED AP, and more. Our engineers have extensive Retro-Cx, LEED prerequisite, Energy Audit, and Energy Star experience.



Learn more about technical services

3 Reasons Solar Power is Still the Next Big Thing

If any of our current industries were to collapse, the power industry would be the most likely candidate. Our current fuel sources are finite, which means prices will rise continuously as supplies decrease until the system collapses completely. In recent years alternative green energy solutions have gained traction. Solar panels are springing up on roofs […]
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SIG Makes Top 10 – Energy Star

The EPA’s Energy Star label launched the green building certification movement in 1999. To recognize the 15th year anniversary of energy efficient building certification, the EPA sponsored a volume recognition event called Certification Nation. SIG is honored to rank sixth in the nation for registering 157 buildings for Energy Star certification in 2014. That’s more […]
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