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

Sustainable Investment Group (SIG) is a national LEED solutions provider. You can trust us to help you achieve your highest sustainability goals, especially as they pertain to LEED. As a LEED Proven Provider® our methods for documenting and earning LEED credits have been perfected over time and are trusted by the USGBC. We are truly experts as our team has collectively worked on over 400 LEED projects and 50 Million SF of commissioning, retro-commissioning, energy auditing, and energy modeling projects. What this means for you is that you will not miss any credits due to improper documentation or inexperience, and most importantly we can help you with every aspect of the LEED project. Most companies do not offer both LEED consulting and the engineering services required for some of the prerequisites and credits each project must earn, but we do. As a bonus, we have expertise in training professionals like yourself how to pass your LEED exams. No other LEED consultants offer all three services in-house.

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

LEED 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

Why Air Quality Concerns You

Air quality isn’t just nice to have at work, school, or home. Many Americans have heard about Sick Building Syndrome for years, but most building owners do nothing—or don’t know what to do to rectify—their sick building. The number of circulating chemical toxins, including formaldehyde, flame-retardants, and VOCs, are known to affect human health. The […]
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Is WELL Certification the New Green?

More building owners are asking about WELL certification and want to know what it means to them if they are considering LEED certification. LEED certification of your building means it’s highly energy efficient, but caring for the living beings within the building is the next step. Good health and wellness are part of the goals […]
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