Cig was Tetra Tech’s largest segment in fiscal 2025, bringing in $2.84B of $5.44B (52%).
| Segment | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gsg | $1.82B | $2.16B | $2.48B | $2.67B | ||||||||||||
| Cig | $1.74B | $2.42B | $2.79B | $2.84B | ||||||||||||
| Rme | — | — | — | — | ||||||||||||
| Wei | — | — | — | — | ||||||||||||
| Tss | — | — | — | — | ||||||||||||
| Technical Support Services | — | — | — | — | ||||||||||||
| Ecs | — | — | — | — | ||||||||||||
| Engineering & Consulting Services | — | — | — | — | ||||||||||||
| Engineering & Architecture Services | — | — | — | — | ||||||||||||
| Rcm | — | — | — | — | ||||||||||||
| Remediation & Construction Management | — | — | — | — | ||||||||||||
| Intersegment Eliminations | — | -$60.99M | -$71.41M | -$75.97M | ||||||||||||
| Elimination Of Inter-Segment Revenue | -$55.26M | — | — | — | ||||||||||||
| Inter-Segment Elimination | — | — | — | — | ||||||||||||
| Intersegment Elimination | — | — | — | — | ||||||||||||
| Total | $3.50B | $4.52B | $5.20B | $5.44B |
Tetra Tech brought in $5.44B from its three segments in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.20B in fiscal 2024. Cig was the largest at $2.84B (52.3%), ahead of Gsg at $2.67B (49.1%).
Compared with fiscal 2024, Gsg grew 7.7% to $2.67B and Cig grew 2.1% to $2.84B.
Tetra Tech began breaking out Intersegment Eliminations in fiscal 2023, when it brought in -$60.99M. The total is net of Intersegment Eliminations, which took $75.97M off revenue in fiscal 2025.
United States was Tetra Tech’s largest region in fiscal 2025, bringing in $3.45B of $5.44B (63%).
| Geography | FY 2009 | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| United States | $2.42B | $2.86B | $3.20B | $3.45B | |||||||||||||
| Us | — | — | — | — | |||||||||||||
| Foreign Countries | $1.09B | — | — | — | |||||||||||||
| United Kingdom | — | $601.16M | $711.62M | $771.72M | |||||||||||||
| Australia | — | $449.51M | $529.11M | $489.10M | |||||||||||||
| Canada | — | $436.22M | $498.58M | $512.30M | |||||||||||||
| Other Countries | — | $172.03M | $260.55M | $223.63M | |||||||||||||
| Total | $3.50B | $4.52B | $5.20B | $5.44B |
Tetra Tech brought in $5.44B from its five regions in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.20B in fiscal 2024. United States was the largest at $3.45B (63.3%), ahead of United Kingdom at $771.72M (14.2%) and Canada at $512.30M (9.4%). The other two regions brought in $712.73M combined.
Compared with fiscal 2024, United Kingdom grew fastest, up 8.4% to $771.72M, while Other Countries fell the most, down 14.2% to $223.63M.
Tetra Tech began breaking out United Kingdom in fiscal 2023, Australia in fiscal 2023, Canada in fiscal 2023 and Other Countries in fiscal 2023. Tetra Tech stopped reporting Foreign Countries as a separate region after fiscal 2022, when it brought in $1.09B.
International was Tetra Tech’s largest revenue line in fiscal 2025, bringing in $2.03B of $5.44B (37%).
| Customer | FY 2009 | FY 2010 | FY 2011 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 | FY 2018 | FY 2019 | FY 2020 | FY 2021 | FY 2022 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| U.S. Government | $1.06B | $1.39B | $1.68B | $1.72B | |||||||||||||
| U.S. Federal Government | — | — | — | — | |||||||||||||
| Federal Government | — | — | — | — | |||||||||||||
| International | $1.09B | $1.66B | $2.00B | $2.03B | |||||||||||||
| Commercial | $748.95M | $869.46M | $909.64M | $899.30M | |||||||||||||
| U.S Commercial | — | — | — | — | |||||||||||||
| U.S. Commercial | — | — | — | — | |||||||||||||
| U.S. State & Local Government | $603.29M | $607.07M | $613.19M | $789.97M | |||||||||||||
| State & Local Government | — | — | — | — | |||||||||||||
| Total | $3.50B | $4.52B | $5.20B | $5.44B |
Tetra Tech brought in $5.44B from its four revenue lines in fiscal 2025, the year ended September 28, 2025. That was up 4.7% from $5.20B in fiscal 2024. International was the largest at $2.03B (37.4%), ahead of U.S. Government at $1.72B (31.6%) and Commercial at $899.30M (16.5%). The remaining revenue line, U.S. State & Local Government, brought in $789.97M.
Compared with fiscal 2024, U.S. State & Local Government grew fastest, up 28.8% to $789.97M, while Commercial fell the most, down 1.1% to $899.30M. From fiscal 2022 to 2025, combined revenue from these revenue lines grew from $3.50B to $5.44B, a compound annual growth rate of 15.8%. International's share of the total rose from 31.0% to 37.4%.
Tetra Tech (TTEK) reports its revenue by segment, by geography and by customer. In fiscal 2025, Cig was its largest segment, bringing in $2.84B (52.3% of the total), followed by Gsg at $2.67B (49.1%).
Cig was Tetra Tech's largest segment in fiscal 2025, bringing in $2.84B, or 52.3% of the $5.44B total across its three segments.
United States was Tetra Tech's largest region in fiscal 2025, bringing in $3.45B, or 63.3% of the $5.44B total across its five regions.
International was Tetra Tech's largest revenue line in fiscal 2025, bringing in $2.03B, or 37.4% of the $5.44B total across its four revenue lines.
Gsg grew faster than Cig in fiscal 2025, up 7.7% from $2.48B to $2.67B. Cig grew 2.1% to $2.84B.
Every figure comes from Tetra Tech's annual financial filings, as reported. Each line keeps the name Tetra Tech gives it, and years follow its fiscal calendar.
Tetra Tech's revenue by segment goes back to fiscal 2010, with figures through fiscal 2025. The latest four fiscal years are free to view, and the full history is available with a Business Quant subscription.