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Partner Engineering and Science, Inc.
Partner Engineering and Science, Inc.
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About Us

Our team supports your real estate strategy

Partner is the leading provider of engineering, environmental, construction, energy, and valuation consulting for the commercial real estate industry. We help our clients manage risk, make smart investments, optimize asset performance, and win at their real estate investment strategies.

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A Brief History

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October 2013

Partner is a founding member of the industry association, the National Engineering and Environmental Due Diligence Association (NEEDDA).

August 2013
ENR’s Top Environmental Firms for 200 Environmental Firms

Partner ranks on ENR’s top lists for the first time.

June 2013
Birdsall Services Group Acquisition

Partner purchased the assets and retained key personnel from a nearly 100-year-old respected engineering firm. Further expanding and creating dual headquarters for East Coast operations.

March 2013
CLRM Founded

Partner and industry leaders founded the CRE industry association Construction Lenders Risk Management (CLRM).


March 2012
Partner moves corporate headquarters into Green building

After completely retrofitting an old telephone company property, Partner obtains LEED certification for new LA-based corporate offices.


Founding of Partner Engineering and Science, Inc.
Like any great company, Partner was founded in CEO Joe Derhake’s garage.


May 2008
Supports California’s Largest Real Estate Transaction of 2008

Douglas Emmett, Inc. (DEI) engaged Partner to conduct Phase I ESAs during their acquisition of six large office properties valued at $610M and 1.4M SF of office space in Los Angeles submarkets.


March 2009
LandAmerica Asset Acquisition

Retains several key employees, along with legacy operational systems, prior reports, and best-in-class report management software.

Partner Energy Founded

The partnership with Partner Energy deepened the capabilities provided to clients. Opening up opportunities for sustainability solutions.


Employee Count 100+

Partner’s employees exceed 100 for the first time.


March 2011
Continental Surveying Acquisition

Partner expands ALTA survey capabilities nationally.


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The Partner difference

When you work with Partner, you access our full spectrum of services, distilled into a tailored approach to meet your goals, wherever you are in the property lifecycle. One call connects you to a global team of multidisciplinary experts: credentialed architects, engineers, and specialists who can assess your project—whether that’s a single building system, a property, or a portfolio—and provide the data you need to make informed decisions and manage risk. Beyond just assessments, our solutions teams offer forensic analysis, scope development, and project implementation support to help you optimize asset performance. Find our complete list of services here.

technology-forward approach

Wouldn’t it be great if there was an “easy button” for ordering, receiving, and managing the hundreds of data points within due diligence and asset management reports? With Partner’s SiteLynx Technology, there is! SiteLynx is Partner’s user-friendly report ordering, delivery, and analysis dashboard.

Learn More Here

It's all about the people

Our mission statement is to be the best home for talented professionals in our fields, and we take that very seriously. We invest heavily in creating a strong culture that we are proud of, training and career development at all levels, and nurturing new ideas. Looking to start your Partner journey? 

Visit our Careers page here.

Let us be your Partner

Learn how we can support your next project or share insights via our newsletter.
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