---
schema_version: "secwatch.filing_event.v1"
accession: "0001436126-23-000006"
form_type: "8-K"
ticker: "MG"
cik: "0001436126"
company_name: "Mistras Group, Inc."
filed_at: "2023-02-09T23:59:59+00:00"
generated_at: "2026-06-19T19:56:10.994443+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Mistras Group COO Jonathan Wolk departs immediately; AlixPartners hired for operational review

## Summary
- Jonathan Wolk's active employment as COO ceased immediately, with severance per prior proxy terms.
- CEO Dennis Bertolotti will assume COO duties on an interim basis.
- AlixPartners engaged to identify margin improvement and sustained cost savings to accelerate EBITDA growth.
- Board states it is focused on positioning the company to drive shareholder value.

## SEC filing metadata
- accession: 0001436126-23-000006
- form_type: 8-K
- ticker: MG
- cik: 0001436126
- company_name: Mistras Group, Inc.
- filed_at: 2023-02-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1436126/000143612623000006/0001436126-23-000006-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1436126/000143612623000006/mg-20230208.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001436126-23-000006
- JSON: https://secwatch.observer/filing/0001436126-23-000006.json
- Plain text: https://secwatch.observer/filing/0001436126-23-000006.txt

## Key facts
- Executive change
  Jonathan Wolk departed as Senior Executive Vice President and Chief Operating Officer at Mistras Group, Inc..
  - Action: ceased active employment
  - Role: Senior Executive Vice President and Chief Operating Officer
  source text: On February 8, 2023, Mistras Group, Inc. (the "Company") notified its Senior Executive Vice President and Chief Operating Officer, Jonathan Wolk, that his active employment would cease immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1436126/000143612623000006/0001436126-23-000006-index.htm

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