Climate-Positive Building Commissioning Services

Operate at your best. Save money. Protect the planet.

Credentialed Building Commissioning Experts

Delivering results that improve performance and save energy.

When GBA analyzes your building’s systems, our recommendations will be backed by a track record of helping building owners cut costs, save time, and reduce greenhouse gas emissions through energy-efficient operations.

What’s the advantage of working with a BCCB Certified Commissioning Firm? Endless expertise.

Commissioning-Group Engineers

Engineers With Advanced Cx Credentials

RCx Incentive Program Prequals

Awards for Cx-Related Work

The reality of commissioning is that finding the problem represents only 20% of the effort.

“Unfortunately, this is where many firms stop. Correcting the problem represents 80% of the effort, but that’s what brings true value to our clients.”

– John Villani, VP and Principal

Building Commissioning + Retro-Commissioning Services

Transforming new and existing buildings into persistent energy saving systems.

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Commissioning (Cx)

Our collaborative philosophy means we don’t just identify problems—we help solve them.

Discover the advantages of working with a commissioning provider that’s a true team player.

City of Evanston, Crown Center

Pre-Design & Design

  • Develop/review Owner’s Project Requirements (OPR) and Basis of Design (BOD)
  • Develop Cx scope, plan, specs
  • Review construction documents, backed by GBA’s skilled design team
  • Issues log


  • Meetings and visits
  • Submittal reviews
  • Observe startup and prefunctional checklist procedures
  • Controls system meeting and trending review
  • Develop/conduct functional performance tests
  • Witness third-party testing
  • Issues log
  • Systems manual and facility staff training


  • Direct/document seasonal performance testing
  • Warranty issues resolution
  • Final Cx report
  • Monitoring-based commissioning services


  • As-built document review
  • Direct/document seasonal FPTs
  • Final Cx report (if not previously completed)
  • Warranty issues resolution
  • Monitoring-based commissioning services
advocate good sam

Retro-Commissioning (RCx)

Taking a whole-building systems approach, our team identifies operational improvements that will increase occupant comfort and save energy and money.

Our data-driven process incorporates our experience with more than 125 projects to identify measures that matter, leading to a cumulative anticipated-to-realized savings ratio of more than 90%. For persistent savings, follow RCx with monitoring-based commissioning.


  • Prepare application for outside funding when available; many utilities offer full or partial payment for RCx projects
  • GBA is a qualified provider with more than 15 utilities, and counting


  • Initial site assessment
  • RCx plan
  • Identify potential operations improvements and energy savings measures
  • Develop cost and energy savings projections


  • Work with team to implement recommendations
  • Develop targeted performance test procedures
  • Collect and analyze trend data


  •  Verify installation and proper operation of measures
  • Update energy savings based on data
  • Final report
  • Need help implementing capital measures? Talk to us.

Monitoring-Based Commissioning

Using Insightful Analytics and Engineering Expertise

To get you the results that matter.

Your data merged with our expertise is how we’ll transform your building systems from inefficient to efficient. Our advanced analytics platform, Trend Sumo®, paired with our on-the-ground experience, leads to faster results, fewer headaches, and more energy savings.

  • Save energy and improve operations
  • Identify complex issues and opportunities
  • Ensure that energy efficiency persists over time

Using another analytics platform? No problem. We’ll do whatever it takes to help you get the results you want.

Learn More About Trend Sumo

GBA employee using Trend Sumo software.

GBA always approaches every project, big or small, with professionalism and dedication.

“Their innovative solutions are second to none. The fact that everyone at GBA is approachable and makes themselves available has been extremely helpful to our company throughout the years.”

– Wade Hucker, Owner, Krause Electrical Contractors

Energy Conserving Commissioning Services

The persistence you need to drive results.

Simpson Querrey Biomedical Research Center, exterior entrance, night

Northwestern University, Simpson Querrey Biomedical Research Center

Commissioning was integral to the new 850,000-square-foot, LEED Gold research lab in downtown Chicago

SSM St. Mary's Janesville exterior dusk<br />

SSM Health St. Mary's Hospital - Janesville

Through retro- and monitoring-based commissioning, this Wisconsin hospital realized nearly 565,000 kWh in annual electricity savings with a short payback period

Exterior terrace, 512w22 office building, New York City


A new LEED Gold commercial office building on New York City’s High Line involved complex commissioning of advanced green systems

11 Keys to an Effective Commissioning Project

Tips for success, drawn from more than 15 years and millions of square feet of projects.

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Effective Data. Efficient Designs. Sustainable Engineering Expertise.

Find the solutions you need to operate at your best.