
For the fifth straight year, Partner continues to climb the ENR Top 500 Design Firms list. This year, we are proud to announce that we jumped 52 places up the list, cracking the top 200 and happily occupying spot #192. In commercial real estate due diligence, Partner is a trusted name for Phase I Environmental Site Assessments and related services.
This news comes as the market for construction design services is poised for a takeoff, with major design firms preparing for the Trump administration’s funding and tax proposals to translate into new development.
So far, 2017 has proven to be an optimistic year in terms of market health, with many of the firms on this list citing early indications that clients, particularly on the private-sector side, think the new administration will cut taxes and regulations, and encourage new capital investments.
“Commercial real estate private-equity firms are seeing all-time highs in fund-raising. Generally, these funds are creating investments that will drive work for engineers,” 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.




