Organization Services

Founded in 2012, Partner Engineering and Science, Inc. (commonly branded as Partner ESI) is a U.S.-based consulting firm specializing in commercial real estate. Headquartered in Southern California, Partner delivers interdisciplinary services across engineering, environmental, construction risk management, energy, sustainability, and valuation to investors, lenders, and developers. With over 1,300 professionals globally, Partner supports clients through property lifecycle assessment—covering Phase I/II environmental due diligence, building condition assessments, geotechnical engineering, zoning & land surveying, energy and ESG advisory, and risk analysis. Operating through a family of companies, clients access a cohesive experience via one point of contact. Partner also offers a proprietary cloud-based platform for ordering and managing due diligence and asset data in a centralized dashboard.