Continuously Pushing Boundaries

Ranked as one of the Top 100 MEP Firms in the US by Consulting-Specifying Engineer | MEP Giants #69

Read more about how GPI ranked #69 in the top 100 firms selected as the 2022 MEP Giants HERE!

With over 50 years in business, we have earned our reputation as one of the leading engineering companies in the United States. GPI has been consistently ranked in Engineering News Record’s Top Design Firms, and we have earned recognition by our clients through our award-winning projects. It is our people who make the difference by being committed to our values of teamwork, quality, and commitment. We constantly educate ourselves and our clients on the newest and most efficient technologies in the industry. Our commitment to sustainability is demonstrated through the design of our own LEED Platinum Certified office in Rockville, MD, the first engineering firm in the state of Maryland to achieve the highest level of LEED certification.

building systems: community and cultural
Community & Cultural
building systems: corporate
building systems: federal
Federal Government
building systems: healthcare
building systems: higher education
Higher Education
building systems: industrial
building systems: infrastructure
building systems: k through 12
building systems: mixed use
Mixed Use
building systems: places of worship
Places of Worship
building systems: repositioning
building systems: senior living
Senior Living


  • Mechanical

  • Electrical

  • Plumbing

  • Fire Protection

  • Structural

  • Civil

  • Building Evaluations

  • New Construction

  • Renovations/Repositioning

  • Infrastructure Upgrades

  • Design/Build

  • Sustainable Design/LEED/Green Globes/WELL

  • Facilities/Asset Management

  • Value Engineering

  • Energy Audits/Energy Modeling

  • ENERGY STAR Certification

  • Peer Review

  • Commissioning