Each year, The Los Angeles Business Journal (LABJ) releases its list of the Top 100 Fastest-Growing Private Companies. This prestigious ranking represents the best and the brightest private companies that are exhibiting the highest revenue growth in the Los Angeles area annually. This year, for the 6th straight year, Partner was honored to make the list, ranking at #75, up from #78 the previous year. Partner is widely recognized as the top provider of Phase I Environmental Site Assessments in the commercial real estate industry.
“With so many fast-growing companies in Los Angeles, it’s quite an honor to be on this list again. The credit goes to the hard work of our team and the loyalty of our clients. We are truly grateful,” said Partner’s Chief Executive Officer, Joe Derhake.
The rankings were announced at an awards ceremony on November 2, 2016, with Partner personnel in attendance to accept the honor. The full published list will be available in the November 7th Los Angeles Business Journal issue. A copy of the issue 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.




