A Mission-Driven Sustainable Engineering Firm
50 years of creating solutions that solve your problems – and the planet’s.
Engineering Sustainable Solutions That Matter
Most of our clients return for our effective solutions, but all of our customers leave with efficient building operations that save energy, save time, and cut costs. At Grumman|Butkus Associates, our dedication to being sustainable design engineers who put people and the planet first has led to decades-long partnerships with clients and hundreds of millions of dollars in energy savings.
“A commitment to energy conservation and customer service inspired the founding of our firm. Fifty years later, it’s still the bedrock of every project.”
Dan Doyle, Chairman – Illinois
Improve Your Building Systems. Impact The Planet.
With innovative energy efficiency consultants at your side.
You need your facility to operate at its best, and we’re here to help you go beyond that. Our LEED and energy efficiency consultants have the expertise to create effective solutions that will benefit both your bottom line and the environment.
Licensed Professional Engineers
Commissioning Group Engineers
Effective Data. Efficient Designs. Sustainable Engineering Expertise.
Find the strategies you need to operate at your best and improve your bottom line with proven analytical, design, and commissioning expertise.
Multidiscipline Sustainable Engineering
We haven’t met a problem we couldn’t solve.
“Grumman|Butkus Associates has been a valued partner with Hyatt since 1984. Their professionalism and quality work continues to make them a trusted team member on our equity portfolio projects.”
Fred Brandstrader, AIA, Hyatt Hotels
Design. Build. Innovate.
Turn your passion into a thriving career at GBA.
If you’re an entrepreneurial engineer who thrives on solving the unsolvable, GBA is the right career move for you. When you join GBA, your ambition will be supported by experienced engineers who know what it takes to succeed – in the field and as a team.
174 Awards for Engineering Excellence – and Counting
What we do wouldn’t be recognized without a commitment to creating the facilities clients need to operate at their best. For over 50 years, that commitment has been acknowledged through international, national, regional, and state-level engineering awards.
Take a look!
We’re Evolving. See How GBA is Pushing Sustainable Engineering Forward.
Explore the latest news, projects, and events at Grumman|Butkus Associates.
Key Weather Considerations for PV Design
Electrical designers must be conscious of environmental factors that will impact electrical equipment, including temperature, wind, snow, and so on. This is especially critical for photovoltaic (PV) installations where a large portion of the system will be subjected...
Sustainability Report Featured on New GBA Site
The newly released 2022 GBA Sustainability Report is now available at GBA's recently launched, redesigned website. In 2013, the firm released its first annual corporate sustainability report. We recently completed the ninth edition, detailing our current scope of...
GBA Celebrates its 50th Anniversary
Grumman|Butkus Associates marked its 50th year in business on May 2, 2023. The company was incorporated on May 2, 1973, as Enercon, Ltd.: a one-person energy consulting firm based in Evanston, IL. Initial commissions consisted mainly of energy management studies,...