ABB Group
Sweden, Switzerland; engineering; construction; energy; power

Alliance Engineering Incorporated
USA, engineering and project services

AMEC
UK, engineering, project management and services

Apex Engineering, Inc.
USA, full-service engineering firm

Baker Energy
USA, engineering, construction, and operations and technical services

Bechtel Group
USA; engineering; construction

Bibb and Associates Inc.
USA, project conceptualization through startup and commissioning

Black & Veatch
USA; engineering; construction