A Mission-Driven Sustainable Engineering Firm

Over 50 years of creating solutions that solve your problems – and the planet’s.

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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.

Discover the GBA Difference

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“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

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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.

Explore Our Energy Efficiency Consulting Services

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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

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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.

Design Your Career With GBA

Awards

175 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!

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News

We’re Evolving. See How GBA is Pushing Sustainable Engineering Forward.

Explore the latest news, projects, and events at Grumman|Butkus Associates.

Discover What’s New for GBA

ASHRAE Audits: What Level Is Right For You?

ASHRAE Audits: What Level Is Right For You?

Energy management often begins with an energy audit, yet many energy managers are uncertain what to include in the scope. The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) provides guidelines for three distinct levels of energy...

Hospital Energy Costs Up Sharply, New GBA Survey Reveals

Hospital Energy Costs Up Sharply, New GBA Survey Reveals

Grumman|Butkus Associates has released its 2023 Hospital Energy and Water Benchmarking Survey, featuring combined data from calendar years 2021 and 2022. For the first time, the report charts and historical data are available at a dedicated website, including...

GBA Promotes Two Employees

GBA Promotes Two Employees

GBA's Chicago and New York regional offices promoted Timothy Venturella and Brendan Erskine to Senior Project Engineer at the recent semi-annual meeting. Timothy Venturella joined GBA’s Evanston office in 2023. He graduated with a BA in Public Relations from the...