---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-123764"
form_type: "8-K"
ticker: "TTEK"
cik: "0000831641"
company_name: "TETRA TECH INC"
filed_at: "2025-12-22T23:59:59+00:00"
generated_at: "2026-05-16T12:29:56.433050+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Tetra Tech appoints ex-American Water CEO Susan Hardwick and ex-US Ecology CEO Jeff Feeler to board

## Summary
- M. Susan Hardwick and Jeffrey R. Feeler appointed to Tetra Tech board, effective December 29, 2025.
- Hardwick, former CEO of American Water (2022-2024), joins Audit and Nominating/Governance committees.
- Feeler, former Chairman/CEO of US Ecology (2013-2022), joins Audit and Compensation committees.
- Both will receive standard non-employee director compensation: $110K annual retainer plus $175K equity award pro-rated.
- Board expands to eight members with these appointments.

## SEC filing metadata
- accession: 0001104659-25-123764
- form_type: 8-K
- ticker: TTEK
- cik: 0000831641
- company_name: TETRA TECH INC
- filed_at: 2025-12-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/831641/000110465925123764/0001104659-25-123764-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/831641/000110465925123764/tm2534127d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-123764
- JSON: https://secwatch.observer/filing/0001104659-25-123764.json
- Plain text: https://secwatch.observer/filing/0001104659-25-123764.txt

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