Tetra Tech, Inc. (TTEK)
Engineering and consulting firm, 25,000. Read October 19, 2026 from the annual report for the period ending September 28, 2025, filed November 20, 2025. Ranked 16 of the 75 Industrials companies read so far, by the share within reach now.
Within reach now
20%
End of 2028
62%
Employees, annual report
25,000
Leading staffing pattern
Architectural, Engineering, and Related Services
Share of the working time within reach, long-run pace, four times in five
- Now20%
- End of 202747%
- End of 202862%
- End of 203069%
What changes for its people by the end of 2028, by its industries' figures
- Stays with people 30%
- Becomes checking a model's work 56%
- Handed over with lighter checks 6%
A consulting and engineering firm whose filing states one total and names its professions, and nothing by segment or country, so the whole workforce takes the engineering services pattern.
The figures on this page come from the company's own annual report and from BLS staffing patterns for its industries, never from a roster. They are estimates with a stated method. Nothing here says what the company will do: within reach is not a forecast of jobs lost or of savings.
What follows from the reading
Share of working time within reach of AI, on the long-run pace at four in five: 20% now, 47% at the end of 2027, 62% at the end of 2028, 69% at the end of 2030. By the patterns, the work is about 69% desk work, 16% people work and 15% body work. These are the site's industry estimates weighted by the shares below: estimates with a stated method and range, not a forecast of what the company will do. By the same patterns, at the end of 2028 about 30% of the working time stays with people (conversation, in-person and hands-on work), 56% becomes checking a model's work and 6% could be handed over with lighter checks, from the industries' own figures, not the company's roles.
Headcount
25,000 employees as of September 28, 2025 (stated). The filing states no count by country; 74% of revenue is from the United States.
The filing: “In fiscal 2025, we worked on over 100,000 projects, in more than 100 countries on all seven continents, with more than 25,000 associates.”
The workforce as industry patterns
| Pattern | Share | Reason, from the filing |
|---|---|---|
| Architectural, Engineering, and Related Services | 100% | By description (c): the filing describes a professional staff of engineers, scientists, analysts and project managers delivering consulting and engineering services from offices worldwide, with no count by kind of work, so the whole workforce takes the engineering services pattern. |
What the filing says about the workforce: More than 25,000 staff worldwide at fiscal 2025 year-end (30,000 a year earlier); a large percentage with technical and professional backgrounds and degrees; the filing names the professions from analysts and architects to toxicologists.
Companies read with the same leading pattern
Other companies whose largest staffing pattern is also Architectural, Engineering, and Related Services, largest first, each read from its own annual report. Within reach now and at the end of 2028, long-run pace, four in five.
- Aecom (ACM, 51,000 employees)20% now, 62% by 2028
- Amentum Holdings, Inc. (AMTM, 50,000 employees)18% now, 51% by 2028
- Jacobs Solutions Inc. (J, 43,000 employees)20% now, 62% by 2028
- KBR, Inc. (KBR, 36,000 employees)18% now, 53% by 2028
What the filing says about AI
8 sentences in the filing name AI. The filing names AI 8 times, as part of the analytics and digital technology the company applies in its client work.
- “We are Leading with Science® throughout our operations, with domain experts across multiple disciplines supported by our advanced analytics, artificial intelligence ("AI"), machine learning and digital technology solutions.”
- “These might be a new water treatment technology, a unique solution to addressing coastal erosion, an AI-enabled system for remote assessment of infrastructure assets or real-time optimization of water management systems.”
- “By Leading with Science® and leveraging our collective technology including advanced data analytics, digital technologies and AI, we create transformational solutions for our clients.”
- “We create customized solutions; from smart data collection and advanced analytics that support decision making to AI-enabled solutions for asset management.”
- “Our subscription solutions provide our clients with extended capabilities for AI-enabled large scale data management, spatial data interpretation, and ability to optimize land, coastal and infrastructure systems.”
Its annual reports, year by year
Sentences naming AI in each annual report, counted by one rule, beside the median report in the Index that year. Each count links its filing. Every company, by year and sector
- Fiscal 20213median 0
- Fiscal 20223median 0
- Fiscal 20233median 1
- Fiscal 20249median 4
- Fiscal 20258median 10
Headcount by filing year
As reported in each year's annual report, with the filing. A year marked not read had no figure the reading could take from the report's text.
| Period | Employees | Filed | Filing |
|---|---|---|---|
| 2025-09-28 | 25,000 | 2025-11-20 | 10-K |
| 2024-09-29 | 30,000 | 2024-11-19 | 10-K |
| 2023-10-01 | 27,000 | 2023-11-22 | 10-K |
| 2022-10-02 | 21,000 | 2022-11-25 | 10-K |
| 2021-10-03 | 21,000 | 2021-11-24 | 10-K |
| 2020-09-27 | 20,000 | 2020-11-23 | 10-K |
| 2019-09-29 | 20,000 | 2019-11-29 | 10-K |
| 2018-09-30 | 17,000 | 2018-11-16 | 10-K |
| 2017-10-01 | 16,000 | 2017-11-20 | 10-K |
| 2016-10-02 | 16,000 | 2016-11-22 | 10-K |
| 2015-09-27 | 13,000 | 2015-11-20 | 10-K |
| 2014-09-28 | 14,000 | 2014-11-19 | 10-K |
| 2013-09-29 | 14,000 | 2013-11-20 | 10-K |
| 2012-09-30 | 13,000 | 2012-11-15 | 10-K |
| 2011-10-02 | 13,000 | 2011-11-17 | 10-K |
| 2010-10-03 | 12,000 | 2010-11-16 | 10-K |
| 2009-09-27 | 10,000 | 2009-11-16 | 10-K |
| 2008-09-28 | 9,200 | 2008-11-19 | 10-K |
| 2007-09-30 | 7,800 | 2007-11-27 | 10-K |
| 2006-10-01 | 7,300 | 2006-12-28 | 10-K |
| 2005-10-02 | 7,700 | 2005-12-16 | 10-K |
| 2004-10-03 | 8,600 | 2005-01-03 | 10-K |
| 2003-09-28 | 8,900 | 2003-12-16 | 10-K |
| 2002-09-29 | 7,492 | 2002-12-30 | 10-K |
| 2001-09-30 | 7,400 | 2001-12-31 | 10-K |
| 2000-10-01 | 6,500 | 2000-12-29 | 10-K |
| 1999-10-03 | 5,443 | 1999-12-30 | 10-K |
| 1998-10-04 | 3,662 | 1998-12-31 | 10-K |
| 1997-09-28 | not read | 1997-12-29 | 10-K |
| 1996-09-29 | 1,899 | 1996-12-30 | 10-K |
Limits of this reading
- One pattern by description: the filing gives no count by kind of work.
- The headcount is stated as more than 25,000.
- No U.S. share is stated.
Source: the company's annual report on EDGAR, accession 0000831641-25-000032, the filing. Read by Claude Fable 5.1 under rubric version 1, by the method. A company can write to info@stratussc.com to have its reading checked against its filing.
The report on Tetra Tech, Inc., $29
This page as a document to keep, with what it does not show: the share within reach at every date on three paces and two reliabilities, a typical workforce of this shape at the stated headcount role by role and task by task (the industries' staffing, never the company's roster), where to start, what changes for the people and what they would learn, every sentence in the filing that names AI, the headcount by year, the companies read with the same leading pattern, the method and a citation line. To print or save as a PDF, open again in your browser for a year.
See the report, $29See the sample first: Walmart's report is free
Questions about this company
- How much of Tetra Tech, Inc.'s working time is within reach of AI?
- An estimated 20% now and 62% by the end of 2028, on METR's long-run pace at four in five, from the workforce Tetra Tech, Inc.'s own annual report describes and BLS staffing patterns for its industries, never from a roster. It is an estimate with a stated method. It is not a forecast of jobs lost or of savings, and it says nothing about what the company will do.
- How many people does Tetra Tech, Inc. employ?
- 25,000 as of September 28, 2025, as its annual report for the period ending September 28, 2025 states.
- What kinds of work make up Tetra Tech, Inc.'s workforce?
- Read from its annual report as a blend of 1 industry staffing pattern, the largest Architectural, Engineering, and Related Services; by those patterns the work is about 69% desk work, 16% people work and 15% body work. Each share has a one-sentence reason on this page that can be checked against the filing.
- What does Tetra Tech, Inc.'s annual report say about AI?
- 8 sentences in the filing name AI. Its annual reports for fiscal 2021 to 2025 name it in 3, 3, 3, 9 and 8 sentences, year by year. They are counted and quoted on this page, never judged: a count says how much a filing talks about AI, not what the company does with it.
- How is this estimated?
- Claude Fable 5.1 read the annual report under the Index's written rubric (version 1) on October 19, 2026: the stated headcount, the share in the U.S. when stated, and the workforce as a blend of industry staffing patterns. The estimates are the site's industry estimates weighted by those shares, from O*NET tasks with estimated lengths and METR's measurements of how long a task AI models can finish. A company can write to info@stratussc.com to have its reading checked against its filing.
Embed these figures on your site
A small card with the share of working time within reach now and at the end of 2027, 2028 and 2030, the date and a link back. Free under CC BY 4.0; the card carries the credit.