Shipyard clean up fraud from Tetra Tech
https://www.courthousenews.com/judge-likely-to-approve-settlement-over-shipyard-cleanup-fraud/
Rail AI Autonomous Track assessment https://railai.tetratech.com/railai-autonomous-track-assessment-system/
Global Climate Change Contract https://investor.tetratech.com/press-releases/news-details/2022/Tetra-Tech-Wins-100-Million-EPA-Global-Climate-Change-Assessment-Contract/default.aspx
Can't say for sure but may be a very small percent.