For the sixth straight year, Partner Engineering and Science, Inc. continues to climb Engineering News Record’s ENR Top 500 Design Firms list. This year, we are proud to announce we were ranked #166 nearly 30 spots higher than in 2017.
Partner’s steady success comes even as commercial real estate stakeholders exercise caution despite strong markets. Design firms may face possible head winds on the uncertainty of infrastructure funding, materials tariffs and labor shortages in key industry sectors.
So far, 2018 has seen a design firm recommitment to focusing on their key markets and systems to deliver their services as efficiently as possible.
“Competition is always fierce in our industry, with many different firms and due diligence sub-specialties. We attribute our continued success on two key factors: hiring the most talented and knowledgeable professionals in their field(s) and truly attempting to understand the needs of clients and how we can help them succeed in every way,” says Joseph P. Derhake, CEO of Partner Engineering and Science Inc.
More on the full list can be found here.

June 22, 2026
Partner has named Frederick Ellington, AIA, LEED AP, as Technical Director in its Construction Services division. With 30+ years of experience, he strengthens the firm's construction risk management, due diligence, and project advisory capabilities for commercial real estate clients.

May 27, 2026
Capital planning in commercial real estate has entered a new phase. In addition to traditional lifecycle replacements, managers now face a growing set of capital needs driven by energy ordinances, decarbonization goals, and climate risk. These drivers are no longer peripheral considerations; they are central to how capital plans are developed, prioritized, and executed.

June 05, 2026
Partner Property Consultants, the European subsidiary of Partner Engineering & Science, Inc. (Partner ESI), announces that Antoine Yeprem joined the company in June 2026 as Senior Consultant, Real Estate Due Diligence, in Germany.




