---
schema_version: "secwatch.filing_event.v1"
accession: "0000866273-26-000006"
form_type: "8-K"
ticker: "MTRX"
cik: "0000866273"
company_name: "MATRIX SERVICE CO"
filed_at: "2026-01-06T23:59:59+00:00"
generated_at: "2026-05-16T11:36:15.910301+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Matrix Service subsidiary President Douglas Montalbano resigns effective Jan 16, 2026

## Summary
- Douglas J. Montalbano resigns as President of Matrix North American Construction (Matrix NAC), effective January 16, 2026.
- Resignation not related to any dispute with Matrix NAC, its clients, or the Company.
- Interim replacement is a current Matrix NAC employee/officer, reporting to Shawn Payne, President Engineering & Construction of Matrix Service.

## SEC filing metadata
- accession: 0000866273-26-000006
- form_type: 8-K
- ticker: MTRX
- cik: 0000866273
- company_name: MATRIX SERVICE CO
- filed_at: 2026-01-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/866273/000086627326000006/0000866273-26-000006-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/866273/000086627326000006/mtrx-20251230.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000866273-26-000006
- JSON: https://secwatch.observer/filing/0000866273-26-000006.json
- Plain text: https://secwatch.observer/filing/0000866273-26-000006.txt

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