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REPORTED · WARN NOTICEPublished Dec 23, 2025

Amentum Holdings, Inc. Layoff — September 2025

EMPLOYEES AFFECTED
135
EFFECTIVE DATE
Sep 30, 2025

What we know

Location: Pueblo, CO (Pueblo County).

A WARN notice was filed on June 24, 2025.

Industry: 54,1330: Engineering Services.

Disclosed through an official WARN filing with the CO state workforce agency.

Summary

Amentum Holdings, Inc. disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice filed with the CO state workforce agency on June 24, 2025. The notice covers 135 employees in Pueblo, CO (Pueblo County), with the layoff effective September 30, 2025.

LayoffTalk has tracked 10 layoff events at Amentum Holdings, Inc. since June 2023, affecting a combined 614 employees.

Comments (1)

Anonymous by default. Be kind — people reading this may be going through it right now.

LTLayoffTalk StaffStaff21 hours ago

Amentum Holdings, Inc. cut 135 jobs in Pueblo, CO on September 30, 2025. If you were part of this round, what was your experience? Others going through it are reading. You can post anonymously below.

SOURCE
Official WARN notice
View state filing ↗
A
Amentum Holdings, Inc.AMTM
Industrials
10
EVENTS TRACKED
614
AFFECTED SINCE 2023
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CREATED DEC 23, 2025LAST UPDATED JUL 3, 2026