INCA Engineers, Inc., dba Tetra Tech INCA, provides consulting services to clients throughout the United States and the world. With a staff of 140 engineers, specialized technicians, surveyors, and administrative personnel, Tetra Tech INCA has offices in Bellevue, Washington and Metairie, Louisiana. Tetra Tech INCA provides a complete range of civil, transportation, structural, mechanical, and electrical engineering, and surveying and mapping services. We deliver our projects using various methods including traditional design-bid build, design-build, and GC/CM. Since 1983, Tetra Tech INCA's innovative approaches to complex challenges have earned us the trust of clients around the world. The 2008 purchase of INCA Engineers, Inc., by Tetra Tech, Inc., means our clients can now access the knowledge of 13,000 employees in more than 300 offices around the world. Specialties Civil, Structural, Transportation/Transit/Bridges, Mechanical and Electrical Engineering, Hydropower Services, Survey