---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-097567"
form_type: "8-K"
ticker: "TTEK"
cik: "0000831641"
company_name: "TETRA TECH INC"
filed_at: "2025-10-07T23:59:59+00:00"
generated_at: "2026-05-17T04:31:36.799114+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Tetra Tech promotes Roger R. Argus to President, Jonathan S. Weiss to lead CIG

## Summary
- Roger R. Argus promoted to President, reporting to CEO Dan Batrack; previously EVP Corporate Development and President CIG.
- Jonathan S. Weiss appointed President of Commercial/International Services Group (CIG), effective immediately.
- Both appointments are part of Tetra Tech's succession planning and internal talent development into fiscal year 2026.
- Argus has over 30 years at Tetra Tech; Weiss also brings 30+ years leading federal and commercial operations.

## SEC filing metadata
- accession: 0001104659-25-097567
- form_type: 8-K
- ticker: TTEK
- cik: 0000831641
- company_name: TETRA TECH INC
- filed_at: 2025-10-07T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/831641/000110465925097567/0001104659-25-097567-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/831641/000110465925097567/tm2528147d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-097567
- JSON: https://secwatch.observer/filing/0001104659-25-097567.json
- Plain text: https://secwatch.observer/filing/0001104659-25-097567.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.