Delta Consultants Email Format

Environmental ServicesCalifornia, United States51-200 Employees

Delta Consultants was acquired by Oranjewoud N.V. in 2008 and today functions as Antea Group’s United States engineering and consultancy arm. Antea Group operates as an international practice specializing in environment, infrastructure, urban planning, and water, combining strategic thinking with technical expertise to address client challenges. Based in Irvine, California, the group maintains a global footprint with offices in more than 100 locations across six continents.

Its client base includes global energy companies, manufacturers, national governments, and local municipalities, and the firm delivers services across environmental management, infrastructure, urban planning, and water resources. In 2025, Antea Group USA announced the addition of senior consultants to support its environmental mergers and acquisitions and water management practices, signaling ongoing expansion of its U.S. team.

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