Tetra Tech, Inc. (TTEK) | The Buildout — AI Infrastructure
The Verdict
Tetra Tech is a global provider of high-end consulting and engineering services focused on water, environment, and sustainable infrastructure. It operates through two segments: Government Services Group, serving U.S. government and international development clients, and Commercial/International Services Group, serving commercial and international clients. For the AI infrastructure buildout, the company supplies the front-end technical work — site feasibility, water availability, power and transmission planning, environmental permitting, and commissioning — before data centers or power projects are built. It also sells digital water software and automation that utilities use to prepare for AI-enabled optimization. Management describes the company as “Leading with Science” and as a front-end applied-science firm rather than a downstream commodity design shop.
| Market Cap | — |
| Revenue (TTM) | $5.1B |
| Revenue Growth | +10.2% |
| EBITDA Margin (TTM) | 13.0% |
| Net Debt | $793M |
| Earnings Beats | 6 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Backlog reached just under $4.5 billion in Q3 FY2026, up 5% sequentially and the first year-over-year increase in several quarters.
- U.S. federal contract capacity stands at $30 billion, with over $650 million of defense capacity added in Q2 and about $300 million of USACE capacity added in Q3.
- Fixed-price mix has risen to about 48% of net revenue year-to-date FY2026 from 37% in 2023, supporting higher margins and lower working capital.
- Nine-month operating cash flow reached a record $467 million, up 31% year over year; management cited 21 consecutive years of operating cash flow exceeding net income.
- GSG margin reached 17.5% and CIG recovered to 15.1% in Q3, while FY26 guidance was raised twice.
What We’re Watching
- U.S. commercial revenue was only +1% year over year in Q3, yet management's 2H FY26 outlook calls for 8–12% growth, requiring a sharp Q4 acceleration.
- Federal contracting-office staffing reductions are still constraining task-order flow, even after budget resolution.
- Department of State/Ukraine revenue came in at about $66 million in Q3 versus a roughly $20 million embedded quarterly assumption; management remains conservative about forecasting it.
- Q4 FY2026 results and the final FY26 print will test whether backlog rises for a third consecutive quarter and whether CIG margin holds around 15.1%.
The core thesis is strengthening on order intake, margin structure, and cash generation: backlog has inflected, fixed-price mix is rising, and guidance has been raised twice. The main open question is whether the federal task-order pipeline and data-center feasibility work convert into sustained revenue before the book-and-burn backlog and weak U.S. commercial base leave a growth gap.
Earnings Beat
In Q3 FY2026, the quarter ended June 28, 2026, total revenue was $1.31 billion and net revenue was $1.11 billion, above the guided range of $1.05 billion–$1.10 billion. Gross margin was 18.6%, and adjusted EPS was $0.42, above the guided $0.38–$0.41. Backlog reached just under $4.5 billion.
| Metric | Q3 FY2026 | Q2 FY2026 | Q3 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $1.3B | $1.2B | $1.2B | +13.5% |
| Gross margin | 18.6% | 17.5% | 21.8% | -320bps |
| EBITDA | $173M | $146M | $179M | −3.4% |
| EPS | $0.42 | $0.36 | $0.42 | −0.6% |
| Backlog | just under $4.5B | $4.28B | n/a | — |
Data centers for us is relatively small. I think it’s around $60 million for the year.— Roger Argus, CEO, 2026-07-30
Management tone: Management's tone on the Q2 FY2026 call, CEO Roger Argus's first, was calm, systematic, and continuity-focused, with Argus repeating that strategy is not changing. On the Q3 call, management was direct about federal contracting bottlenecks, data-center revenue being small, and state and local caution; it reframed AI disruption as an enabler for front-end technical work rather than a meaningful revenue risk.
Management Guidance
Management guided Q4 FY2026 net revenue of $1.12 billion–$1.17 billion and adjusted EPS of $0.45–$0.48. For full-year FY2026, guidance was raised to net revenue of $4.315 billion–$4.365 billion and adjusted EPS of $1.56–$1.59; assumptions include intangible amortization of $34 million, depreciation of $23 million, interest expense of $30 million, a 27.3% tax rate, and no future acquisitions.
Trajectory
Reported revenue is re-accelerating sequentially — Q3 FY2026 revenue was $1,308.6 million, up 7.2% from $1,220.2 million in Q2 — after the USAID and disaster-driven declines earlier in FY26. GSG margin reached 17.5% and CIG recovered to 15.1% in Q3, while gross margin on the financial spine was 18.6%. The lift came from international growth and defense order conversion, with rising fixed-price mix supporting margins; U.S. commercial remains the weakest reported growth.
The Model
The model projects FY+1 revenue of $4,400 million with EBITDA of $629 million, a 14.3% margin, and FY+2 revenue of $4,750 million with EBITDA of $703 million, a 14.8% margin. Near-term revenue is anchored by the just-under-$4.5 billion backlog and the raised FY26 guidance, while the outer-year step-up assumes continued federal task-order conversion, international water demand, and rising fixed-price mix. The model publishes revenue and EBITDA only.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $4.8B | $4.4B | $4.8B |
| YoY Growth | — | −8.0% | +8.0% |
| EBITDA | $457M | $629M | $703M |
| EBITDA Margin | 9.6% | 14.3% | 14.8% |
Projections are the median of 5 independent model runs. The model’s revenue sits 5.3% above analyst consensus.
Management guided Q4 FY2026 net revenue of $1.12 billion–$1.17 billion and adjusted EPS of $0.45–$0.48. For full-year FY2026, guidance was raised to net revenue of $4.315 billion–$4.365 billion and adjusted EPS of $1.56–$1.59; assumptions include intangible amortization of $34 million, depreciation of $23 million, interest expense of $30 million, a 27.3% tax rate, and no future acquisitions.
What Could Go Right — and Wrong
- Federal contracting throughput normalizes and task orders under the $30 billion contract capacity convert into defense and civilian revenue.
- Data-center feasibility assessments convert into larger named power, water, and permitting contracts, lifting data-center revenue materially above the current roughly $60 million.
- Department of State/Ukraine revenue stabilizes as base business, removing a volatile revenue swing.
- U.K. AMP cycle, Hydro-Québec's 11 GW expansion, and Australia's $17 billion digital-water market convert into named task orders.
- Fixed-price mix continues rising and CIG margin holds at or above Q3's 15.1%.
- Federal task-order flow remains stalled by contracting-office staffing shortages, leaving the $30 billion capacity undrawn.
- Department of State/Ukraine work is cut or paused, removing the roughly $66 million quarterly revenue stream.
- U.S. commercial misses the raised 8–12% second-half outlook as offshore-wind cancellations overpower energy, mining, and data-center growth.
- Municipal clients fail to replace federal grants with rate increases and bonds, pushing state and local growth below the reduced 5–10% outlook.
- Data-center feasibility work fails to convert into material revenue, keeping AI exposure at about 1.4% of net revenue and leaving the core business to carry growth.
Looking Ahead
Over the next twelve months, the focus is on Q4 FY26 execution and the first FY27 guidance. Management has guided Q4 net revenue of $1.12 billion–$1.17 billion and expects the current federal order conversion, international water programs, and data-center scope expansion to continue. The open catalysts are whether backlog grows for a third consecutive quarter, whether U.S. commercial accelerates to the raised 8–12% second-half outlook, and whether the $30 billion federal contract capacity converts into named task orders.
- Q4 FY2026Q4 FY26 earnings and final FY26 print — Tests guided revenue, adjusted EPS, a third straight backlog rise, and CIG margin.
- H2 FY26 / FY27Federal task-order conversion — Task orders under $30B federal capacity and newly added defense/USACE capacity.
- FY27First FY27 guidance — Shows margin framework and revenue bridge after DoS/Ukraine and disaster rolloff.
- Ongoing, multi-yearData-center feasibility conversion — 20+ active assessments converting to larger power, water, and permitting awards.
- Through 2030U.K. AMP cycle conversion — Over £2B contract capacity converting into U.K. water awards.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $4.3B | $4.8B | $5.1B | +10.7% |
| Gross Margin | 20.0% | 20.1% | 18.8% | +7bps |
| EBITDA | $574M | $457M | $3.6B | -20.4% |
| EBITDA Margin | 13.3% | 9.6% | 13.0% | 374bps |
| Net Income | $333M | $248M | $436M | -25.7% |
| Free Cash Flow | $341M | $439M | $3.0B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)18.8%
- EBITDA Margin (TTM)13.0%
- Net Margin (TTM)8.6%
- ROIC18.0%
- FCF Conversion83.1%
- SBC / Revenue-1.9%
The Company
Tetra Tech is a global provider of high-end consulting and engineering services focused on water, environment, and sustainable infrastructure. The company describes itself as “Leading with Science.” Its work spans water resources analysis and management, environmental monitoring, data analytics, government consulting, waste management, civil infrastructure master planning, and resilient engineering design. For the AI infrastructure buildout, Tetra Tech provides the front-end technical and regulatory work — data-center siting, water availability, power and transmission planning, environmental permitting, and commissioning — before projects are built.
Tetra Tech operates through two segments: Government Services Group, serving U.S. government and international development clients, and Commercial/International Services Group, serving U.S. commercial and international clients. Its 10-K lists office locations rather than operating infrastructure — Pasadena, Arlington, Boston, Irvine, London, Melbourne, New York, Oakland, Portland, and Sydney. The company has no manufactured capacity or owned power-generation assets. It has been shifting toward fixed-price work, which management says carries higher margins and lower working capital.
Business Segments
Competitive Landscape
Tetra Tech's 10-K lists a broad set of principal competitors: AECOM, Arcadis NV, AtkinsRéalis, Black & Veatch, Booz Allen Hamilton, Brown & Caldwell, CDM Smith, Exponent, GHD, ICF International, Jacobs, Leidos, SAIC, Stantec, TRC Companies, Weston Solutions, and WSP Global. The intel file notes that no neighbor transcript mentions Tetra Tech by name, but competitor calls show the same federal and data-center demand at larger scale; Tetra Tech is a smaller direct beneficiary of the AI buildout by disclosed revenue.
- JacobsVerified competitor; data-center revenue +100% y/y; AI ecosystem 10–11% of business and growing >40%; pipeline +400%.
- AECOMVerified competitor; Department of War pipeline +50%; AI-driven wins about $1B; more than half of IIJA funding unspent.
- StantecVerified competitor; water +11% organic; 2.5 GW hyperscaler data-center program; DoD accelerating.
- ICF InternationalVerified competitor; commercial energy re-accelerating; federal stabilization; aggressive M&A posture.
- Verified competitor; federal awards +38%; book-to-bill 1.4x; backlog $9.3B.
Supply Chain
Tetra Tech sits at the front end of infrastructure development — planning, feasibility, permitting, siting, water, environment, and design. Documented customers are mostly government agencies and utilities; no neighbor transcript mentions Tetra Tech by name.
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