Partner Engineering & Science, Inc.

Environmental ServicesCalifornia, United States1001-5000 Employees

Partner Engineering & Science, Inc. is an international environmental services firm that provides engineering, environmental consulting, construction expertise, appraisal, and energy design services. Leveraging about 90 years of experience, it works across the asset lifecycle—from initial due diligence and design through development, construction, and ongoing operation and optimization. Its service scope includes environmental due diligence, subsurface investigations and remediation, MEP and facilities engineering, building and infrastructure design, energy consulting, sustainable building design, and related risk management and regulatory compliance.

Based in Torrance, California, the company positions itself as a sizeable player in its field with a broad, multidisciplinary offering. In May 2026, the firm announced leadership appointments, including Ken Sliter as Director of Client Development - Capital Programs and Joe Tunas as Technical Director in Environmental Health and Safety.

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