A Mission-Driven Sustainable Engineering Firm
Over 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.
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Customer Satisfaction
Licensed Professional Engineers
LEED Projects
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
Careers
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.
Awards
176 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!
News
We’re Evolving. See How GBA is Pushing Sustainable Engineering Forward.
Explore the latest news, projects, and events at Grumman|Butkus Associates.
Participate in GBA’s Hospital Survey to Receive Free Benchmarking Data
GBA is soliciting data for the next edition of its annual healthcare facility benchmarking survey, including information from calendar years 2023 and 2024. Since its inception in 1995, GBA's Hospital Energy and Water Benchmarking Survey has helped hospitals benchmark...
GBA Mourns the Passing of Founder David Grumman
David Leroy Grumman Sr., founder of nationally recognized engineering firm Grumman|Butkus Associates, died peacefully on Jan. 3, 2025, at his home in Evanston, IL. He was 90. Grumman’s lifetime of work in the consulting engineering field, and his tireless advocacy for...
GBA Promotes 16 Employees
GBA recently promoted 16 staff members. Except where noted, all staff are headquartered in the Chicago regional office: Doug Frey, PE, LEED AP, was promoted to Vice President. Chris Jones, PE, LEED AP, and Todd Soukup, LEED AP BD +C, were promoted to Associate Vice...