Learn all about us in this short two-minute video!

CEO and Co-Founder of Sustainable Investment Group (SIG), Charlie Cichetti, provides an overview of SIG – a green building consulting firm headquartered in Atlanta, GA. SIG also has offices in Boulder, CO, Minneapolis, MN, New York, NY and San Francisco, CA.

Sustainable Investment Group, LLC (SIG) is a full-service sustainability consulting firm that provides environmentally focused solutions to design, construction, real estate, and building operations professionals to support a high level of performance, value, and quality in the built environment. SIG offers Energy Audits, ENERGY STAR verification, LEED and WELL Building Consulting, Commissioning, and other technical consulting services. SIG also helps grow the green building industry through education and training, having helped over 12,000 professionals across the U.S. prepare for their LEED and WELL AP exams.

SIG was founded on the premise of promoting a better built environment.  Initially, SIG was formed to provide education and training for Real Estate professionals seeking LEED credentials (i.e.: LEED GA or LEED AP). However, through our working knowledge of the USGBC’s sustainability programs and relationships developed through our training courses, we were afforded the opportunity to expand our service offerings to include consulting and engineering services.  By offering solutions for all aspects of the green building movement, SIG represents a complete sustainability resource for the Commercial Real Estate industry.

SIG’s Mission:

Improving the built environment to inspire stewardship of the natural environment.


Since its inception, SIG has worked on over _ _ sqft of office, retail and residential space providing services such as LEED Consulting and Training, ENERGY STAR verification and certification Technical services such as indoor air quality testing and commissioning.

Core Values


SIG supports happiness and excellence not only in our work but in the lives of our clients and employees.


We promote sustainability through global education and local community involvement.


SIG creates win-win opportunities that bring value through honesty.


SIG develops enduring ties with our employees, clients and colleagues.