O'Hara & Associates

Tetra Tech is one of the leading providers of provider of consulting, engineering and technical services in the world. The company maintains more than 280 office locations. It undertakes groundwater, mining, geotechnical, information technology, and environmental and watershed management projects. Tetra Tech provides technical support services for energy and disaster management projects. The company also provides architectural, program administration, and interior and exterior design services. With annual revenues of over $2 billion, it employs a staff of nearly 10,000 people. As a publicly traded company, Tetra Tech s subsidiaries include GeoTrans, Haselwood Enterprises, Ardaman & Associates, and Bryan A. Stirrat & Associates.

Exponent is a multi-disciplinary engineering and scientific consulting firm that brings together more than 90 different disciplines to solve important engineering, science, and regulatory issues facing our clients.* Accident and Failure Investigation* Design and Process Evaluation* Environmental and Health Consulting* Product Performance, Safety and Recall* Industrial and Occupational Safety* Regulatory Compliance* Research and Technology Development* Risk and Engineering Management