What Grumman/Butkus Associates does

Grumman|Butkus Associates (GBA), founded in 1973 as Enercon Ltd. and rebranded in 1982, is a privately held sustainable engineering firm headquartered in Evanston, Illinois, with regional offices in Madison and Milwaukee, Wisconsin, and Hoboken, New Jersey. The firm employs more than 150 professionals and operates as a professional services consultancy delivering mechanical, electrical, and plumbing (MEP) engineering design; new-building and retro-commissioning; monitoring-based commissioning; facility performance analysis (ASHRAE audits, energy modeling, benchmarking); and energy efficiency consulting covering LEED, Green Globes, decarbonization, and regulatory compliance.

GBA's technical core rests on licensed professional engineers with credentials spanning PE, LEED AP, BCxP, CCP, CEM, BEAP, and QCxP, supported by two proprietary software platforms: Trend Sumo®, a fault detection and diagnostics (FDD) platform that automates processing of building automation system trend data to identify HVAC inefficiencies (trademarked 2020), and Energy Sumo®, a portfolio-level energy dashboard integrating with ENERGY STAR Portfolio Manager (trademarked 2022). Revenue is generated through project-based professional services engagements with multi-year contract cadence; pricing is quote-based, dependent on scope, complexity, and building size. The firm markets primarily through direct enterprise engagement, technical thought leadership (blog, ASHRAE publications, conference presentations), and earned credibility via 177+ industry awards and 80% repeat-client business. Primary served verticals are healthcare, education and research, commercial office, and mission-critical/data centers, with additional exposure to hospitality, senior living, sports and recreation, laboratory and pharmaceutical, government, and cultural institutions. Notable long-tenured clients include Hyatt Hotels (since 1984), Northwestern Medicine, Advocate Health, NYU, the U.S. GSA, and Argonne National Laboratory.

Name

Grumman/Butkus Associates

Legal name

Enercon Ltd.

Website

https://grummanbutkus.com

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

101–250 employees

Short description

Grumman|Butkus Associates is a privately held, 50-year-old sustainable engineering firm delivering MEP design, commissioning, facility analysis, and energy efficiency consulting to healthcare, higher education, commercial, and government clients across the Midwest and Northeast, supported by proprietary Trend Sumo® and Energy Sumo® analytics platforms.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Engineering Services (541330), Engineering Services (54133)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Building Management & Facility Control Systems (BMS/BAS, Power Monitoring, EPMS) (EUAEAFAJ)

akta.pro secondary industry

Asset Performance & Reliability Management (APM/RBI/RCM) (EUAEAMAK)

Keywords

• MEP engineering design
• Building commissioning services
• Energy efficiency consulting
• Retro-commissioning services
• Sustainable engineering consulting

Headquarters

HQ city

Evanston

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Revenue model

1. MEP Engineering Design Services: Comprehensive mechanical, electrical, and plumbing engineering design for new and existing buildings, including hospitals, labs, hotels, data centers, and commercial facilities. Projects include chiller plants, boiler plants, HVAC systems, electrical distribution, plumbing, and fire protection.
2. Commissioning and Retro-Commissioning: Building commissioning services for new and existing facilities including pre-design, design review, construction observation, functional performance testing, and warranty phase services. Retro-commissioning tunes up existing buildings to improve efficiency and savings.
3. Facility Analysis and Energy Studies: Building performance analysis including facility assessments, energy studies, ASHRAE audits, benchmarking, energy modeling, troubleshooting, and forensic investigations to help owners reduce energy use and cut costs.
4. Energy Efficiency Consulting: Comprehensive energy engineering services including LEED and Green Globes certifications, infrastructure master planning, emissions reduction strategies, regulatory compliance, and decarbonization consulting.
5. Monitoring-Based Commissioning (MBCx): Ongoing monitoring-based commissioning services using Trend Sumo® analytics platform to ensure persistent facility performance and energy savings over time.
6. Healthcare Benchmarking Services: Annual Hospital Energy and Water Benchmarking Survey providing peer group comparisons for energy use, water use, costs, and facility equipment characteristics. Offered free to healthcare facilities.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels7 records

Core offering

Grumman|Butkus Associates (GBA) is a sustainable engineering firm providing mechanical, electrical, and plumbing (MEP) engineering design, building commissioning and retro-commissioning, facility analysis, and energy efficiency consulting for hospitals, universities, commercial buildings, data centers, hotels, and government facilities across North America. The firm complements its professional engineering services with two proprietary analytics platforms—Trend Sumo® (fault detection and diagnostics) and Energy Sumo® (energy dashboard)—to deliver persistent energy savings to clients.

Product overview

Grumman|Butkus Associates is a sustainable engineering firm offering a portfolio of professional services centered on MEP (mechanical, electrical, plumbing) engineering, commissioning, facility analysis, and energy efficiency consulting. The core service offerings include MEP Engineering Design, Commissioning and Retro-Commissioning, Facility Analysis, Energy Efficiency Consulting, and Healthcare Benchmarking. The firm also operates two proprietary software platforms: Trend Sumo (a fault detection and diagnostics FDD platform for analyzing building automation system data) and Energy Sumo (an energy dashboard for portfolio-wide consumption monitoring). These software tools complement the engineering services by enabling persistent monitoring and optimization of building performance.

Differentiator

Problem solved

Functional benefit

Products and services

• MEP Engineering

Quantifiable outcome

• 90%+ anticipated-to-realized savings ratio on retro-commissioning projects
• +5 more outcomes

Named customers20 records

Segments10 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature2 records

Partnerships

15 partnerships are on record, tiered minor and core.

• IEEEminorOthersProfessional membership organization. GBA staff participate in IEEE activities and standards development.
• Building Commissioning Association (BCxA)coreOthersGBA is a Certified Commissioning Firm recognized by BCxA. GBA principals have held leadership positions including BCxA President's Award and presidency of the association.
• Practice GreenhealthcoreOthersHealthcare environmental sustainability organization. GBA received Champion for Change Awards 2013-2016 for environmental performance in healthcare.
• American Society for Healthcare Engineering (ASHE)coreOthersProfessional organization for healthcare facility engineering. GBA is an active member serving healthcare clients.
• National Fire Protection Association (NFPA)minorOthersProfessional association setting fire safety standards. GBA staff participate in NFPA activities.
• International Institute for Sustainable Laboratories (I2SL)coreOthersOrganization focused on sustainable laboratory design and operations. GBA has received I2SL Sustainable Laboratory Awards and hosts educational events.
• U.S. Green Building Council (USGBC)coreOthersOrganization administering LEED certification. GBA is a member and has worked on 80+ LEED certified projects including 9 Platinum certifications.
• Health Care Without HarmminorOthersInternational healthcare sustainability organization. GBA is an active member.
• ASHRAEcoreOthersInternational society for heating, refrigeration, and air-conditioning engineers. GBA staff include ASHRAE Fellows and the firm has received numerous ASHRAE awards including Society-level Technology Awards.
• National Society of Professional Engineers (NSPE)minorOthersProfessional organization for professional engineers. GBA staff participate in NSPE activities.
• American Society of Plumbing Engineers (ASPE)minorOthersProfessional organization for plumbing engineering. GBA staff have received recognition from ASPE including Plumber of the Year award.
• IBPSA (International Building Performance Simulation Association)minorOthersOrganization focused on building performance simulation. GBA engineers participate in IBPSA activities.
• ComEd Energy Efficiency ProgramcoreOthersComEd utility energy efficiency program. GBA has been recognized as Energy Efficiency Service Provider of the Year (2022) and Most Savings of the Year (2022). GBA helps clients access utility incentives.
• Green GlobescoreOthersGreen building certification program. GBA is an accredited evaluator for Green Globes assessments.
• NexantminorOthersEnergy consulting firm administering utility programs. GBA has received multiple RCx Cup Awards from Nexant for top energy-saving projects verified through their programs.

Scale indicators12 records

Recent moves14 records

Expansion highlights6 records

Broad incumbents

• Burns & McDonnell: Burns & McDonnell is a large employee-owned engineering, architecture, and construction firm with extensive MEP and energy practices. Overlaps with GBA in energy engineering and commissioning but operates at much greater scale and broader geography.
• Stantec: Stantec is a global engineering, architecture, and environmental services firm with significant building engineering and energy consulting practices. Larger, broader incumbent competing for similar MEP and energy efficiency mandates.

Direct peers

• Smith Seckman Reid (SSR): SSR is an employee-owned engineering firm delivering MEP, commissioning, and energy services across healthcare, education, and infrastructure. Similar privately held, technically driven niche with equivalent vertical mix.
• Affiliated Engineers (AEI): AEI is a specialized MEP and building systems engineering firm with deep commissioning, lab, and energy practices serving healthcare, research, and higher education clients. Closely analogous to GBA in technical depth and high-performance building focus.
• Karpinski Engineering: Karpinski Engineering is a privately held MEP, commissioning, and energy engineering firm serving healthcare, higher education, and corporate clients. Very comparable mid-size niche engineering consulting profile.
• ME Engineers: ME Engineers is a privately held MEP engineering design firm with strong commissioning and energy efficiency practices serving healthcare, higher education, sports, and mission-critical clients. Highly comparable in service mix, vertical orientation, and firm size.
• dbHMS: dbHMS is an MEP engineering, commissioning, and building analytics consulting firm with a similar healthcare, hospitality, and commercial focus. Direct peer given shared emphasis on commissioning and energy analytics.
• IMEG Corp (formerly KJWW): IMEG is a large employee-owned engineering firm providing MEP, commissioning, and energy services with strong healthcare and higher-education portfolios. Closely comparable service scope, only at larger scale.
• RMF Engineering: RMF is a privately held MEP and energy engineering firm with healthcare, higher education, and government clients. Highly comparable service mix and firm-level culture to GBA.
• Newcomb & Boyd: Newcomb & Boyd is a privately held MEP engineering and energy consulting firm serving healthcare, education, government, and commercial clients across the Southeast. Directly comparable service portfolio and firm structure to GBA.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/grummanbutkus
• Facebookfacebook.com/grummanbutkus-associates-1385285015032526
• LinkedInlinkedin.com/company/102242
• Instagraminstagram.com/grummanbutkus/?igshid=YmMyMTA2M2Y%3D

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Grumman/Butkus Associates