Partner Engineering and Science Inc. (Partner), a national engineering, environmental and energy consulting firm headquartered in Torrance, CA, has been featured on the Inc. 5000 Fastest-Growing Private Companies list for 2022. Partner has achieved a record 7th appearance on this prestigious list. According to INC, only four companies have ever made the list 7 times in the 40 years of the INC 5000.
The Company’s most recent entrepreneurial venture is Partner Valuation Advisors, a real estate evaluation firm that will integrate Partner’s Industry leading assessment and ESG experience with the 40 years of combined valuation and advisory experience from Eric Enloe and Brandon Nunnink.
Partner’s Fifteenth anniversary was also commemorated this month. Joe Derhake, CEO, remarks “Partner’s 15 years have been an extraordinary journey. We started with eight people and now we’re at over 1,400. We’ve always sought to be the best home for talented professionals since day one. Year after year, our values and entrepreneurial spirit continue to propel us to industry leader status.”
For a complete list of the Inc. 5000’s Fastest-Growing Private Companies of 2022, the list is available in the September 2022 issue of Inc. Magazine.

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.




