Partner Engineering and Science Inc. is proud to be featured on the 2019 Engineering News-Record Top 500 Design Firms list, the seventh straight year we have been listed in ENR’s Top 500. We are pleased to have moved up 17 spots from last year’s list to sit at #149.
“In the world of commercial real estate, we have become the brand you trust,” says Partner CEO Joseph P. Derhake, PE. “Competition for new clients and employees is always fierce, and we never take our success for granted. We keep striving to keep our clients’ trust and retain talent. We are evolving robust internal practices with addition of bold new leadership, new ideas and integration of technology.”
ENR’s data indicates that there has never been a more robust landscape for the design services sector, with virtually all market sectors in the Top 500 survey seeing gains in 2018. Overall, total industry design revenue was up 7.7% from the year prior, mirroring Partner’s own strong revenue growth in 2018.
Executives remain bullish about mulit-sector market demand and continued economic strength, with no signs of slowdown on the horizon, which is reflected by an increase in staff hiring, an increase in project volume, and an increase in firms reportin g a higher backlog of future project orders.
To see the complete list of Top 500 design firms, click 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.




