Tetra Tech's Backlog Inflection: Data Centers and Water Programs Drive a Turnaround

After a prolonged slide, TTEK posts two consecutive quarters of sequential backlog growth, with expanded scope for data centers and resilient water infrastructure demand.

TTEK · Earnings Call · 2026-07-30

A Quarter of Inflection

After a stretch of backlog declines, Tetra Tech's fiscal Q3 2026 marked a decided turning point. Revenue came in at $1.1 billion, EPS reached $0.42, and—critically—backlog grew 5% sequentially to just under $4.5 billion. As CEO Roger Argus put it, “We received significant new orders during the quarter, including commercial orders for data centers and sediment restoration projects, driving our backlog up by more than $200 million in the quarter.” — Roger Argus, CEO · 2026-07-30 This followed an 8% sequential jump in Q2, making it two quarters in a row of growth after a period where the federal procurement slowdown had kept visibility short. The backlog growth is not just a number—it reflects a shift in the mix of work, with water treatment and infrastructure programs increasingly coming through larger, multiyear contract vehicles.

Data Centers: From Engineering to Feasibility to Power and Water

The most striking change is the scope expansion in data center work. Historically, Tetra Tech's involvement was limited to engineering and commissioning. Now it spans the entire value chain—feasibility studies, siting, and increasingly the power and water supply that new data centers require. In the Q&A, Argus elaborated: “the scope of work that we provide for data centers is expanding -- we started with more of the engineering commissioning type work, expanded into feasibility studies... and now doing... power and water supply associated with the development of new data centers.” — Roger Argus, CEO · 2026-07-30 This is a strategically important pivot because it positions Tetra Tech as a front-end partner for a booming sector in which water availability and energy reliability are the most binding constraints. The data center work may still be modest in dollar terms—around $60 million annually—but its margin profile is far more attractive than traditional design-build, and it opens doors to adjacent infrastructure like high-voltage transmission and water reuse.

Tetra Tech is a front-end applied science, technical and engineering firm... For us, AI is an enabler for our technical experts and it allows us to provide better solutions to evaluate more alternatives and to assess larger data sets to develop better solutions for our clients.
Roger Argus, CEO · 2026-07-30

The AI narrative was a direct answer to investor concerns that generative AI could commoditize engineering design. By positioning itself as the firm that supplies site-specific, geologically informed, regulatory-aware thinking—the very opposite of offshore, repetitive design—management argues that AI will expand its market rather than destroy it. The company has already proven this with its backlog growth and expanding margins, and it's a view that resonates with the broader market's focus on AI infrastructure.

Margin Expansion and Cash Generation

The financial results reinforce the strategy. Management reiterated its goal of expanding EBITDA margins by 50 basis points per year, and the progress shows up in the fundamentals. In the latest filed quarter (Q2 FY26), operating margins had already reached 10.8%, and the trajectory is upward. The company's operating margin has moved from mid-single digits a decade ago to double digits now, underpinned by a higher mix of fixed-price work and front-end services. CFO Steve Burdick highlighted that operating cash flow for the first nine months hit an all-time high of $467 million, and net leverage stands at a modest 0.88x, well within the 1–2x target. This financial firepower fuels a consistent capital-return program—buybacks, an 11% dividend increase, and a healthy M&A pipeline. This is a continuation of a deliberate strategy that has been in place for several quarters. On the prior call, Dan Batrack (then CEO) explained the fixed-price shift: “we are increasing the percentage of fixed price work we have within the company, which actually carries higher margin.” — Dan L. Batrack, CEO · 2025-07-31 That shift is now paying off in the margin trajectory and in the company's resilience even as federal budget battles have narrowed the base of work.

Outlook and Optics

Management raised full-year guidance, with net revenue now expected at $4.315–4.365 billion and adjusted EPS of $1.56–1.59. The confidence is underpinned not just by the backlog rebound but by a diversified client base: U.S. federal grew 12%, international 12%, and state & local 5% in the quarter, with municipal water treatment notably up double digits. The commercial orders for data centers and sediment restoration are a fresh element, and they align with the broader global trend of infrastructure spending linked to AI and energy transition. In sum, Tetra Tech has successfully navigated a turbulent period—the loss of USAID work, federal procurement gridlock, and a stock drawdown of 26% from its 2024 peak—by repositioning toward higher-value technical services. The two consecutive quarters of backlog growth signal that the pivot is working, and the expansion into data center power and water further differentiates the company in a crowded engineering landscape.