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Amentum's Overview

Total employees34845
HeadquartersChantilly
Founded

Amentum is a premier global government and commercial services partner headquartered in Chantilly, Virginia. With a workforce of approximately 50,000 dedicated professionals, the company delivers a broad spectrum of services including engineering, project management, technology integration, logistics, and mission support. Amentum specializes in national security, critical infrastructure, environmental stewardship, and energy solutions, serving U.S. federal government agencies, allied governments, and commercial customers worldwide. The company is known for its commitment to safety, innovation, and operational excellence in tackling complex challenges.

Where is Amentum's Headquarters?

HQ Function

The Chantilly headquarters serves as the central hub for Amentum's executive leadership, corporate strategy, global operations management, and key administrative functions.

Notable Features:

The headquarters is situated in a modern office complex, likely featuring contemporary design, collaborative workspaces, and advanced technology infrastructure to support its global operations.

Work Culture:

Amentum's HQ fosters a dynamic, mission-driven work culture emphasizing innovation, integrity, collaboration, and a strong commitment to client success and employee safety. The environment is professional and geared towards supporting complex, high-stakes projects.

HQ Significance:

Its location in the National Capital Region is significant for a major government contractor, facilitating close interaction with U.S. federal agencies. It serves as the nerve center for Amentum's global strategic initiatives and operational oversight.

Values Reflected in HQ: The headquarters' operations and environment aim to reflect Amentum's core values: Live Safe, Act with Integrity, Value Our People, Drive Innovation, and Deliver Mission Success.

Location:

Amentum operates in numerous countries across North America, Europe, Asia, Africa, and Australia, supporting critical missions for government and commercial clients. Functions supported globally include engineering and design, project and program management, IT and cyber security, logistics and supply chain management, asset management, environmental services, nuclear operations, and national security solutions on a global scale.

Street Address:

4800 Westfields Blvd, Suite 400

City:

Chantilly

State/Province:

Virginia

Country:

USA

Amentum's Global Presence

Aiken, South Carolina, USA

Address: Specific addresses vary by project; Amentum has a significant presence in and around Aiken, SC.

Serves as a key operational hub for Amentum's extensive work in the Southeastern U.S. nuclear and environmental sector, managing complex, long-term government contracts.

Germantown, Maryland, USA

Address: Multiple office locations in the Germantown/Gaithersburg area.

Acts as a strategic center for engaging with federal government clients, delivering technology-driven solutions and mission support in the National Capital Region.

Warrington, United Kingdom

Address: Key offices located in Warrington, Cheshire, supporting UK operations.

Functions as Amentum's primary base for operations in the United Kingdom and parts of Europe, focusing on high-hazard industries and national security programs.

Buying Intent Signals for Amentum

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of Amentum

As of April 2025, Amentum' leadership includes:

John Heller - Chief Executive Officer
Charlie Mathis - Chief Financial Officer
Jill Bruning - President, Engineering, Science and Technology (ES&T) Group
Mark Whitney - President, National Security Group
Rob Tillery - Chief Human Resources Officer
Chico Moline - Chief Information Officer
Stuart Bradie - Executive Chairman (Note: John Heller is CEO; previous information for other companies sometimes listed Stuart Bradie who is CEO of KBR. This should be verified for Amentum's current chairman if distinct from CEO.) *Correction: Amentum's board chair is typically from its private equity owners. John Heller is CEO and also serves on the board. For simplicity, focusing on operational execs.*

Investors of Amentum

Amentum has been backed by several prominent investors over the years, including:

American Securities LLC
Lindsay Goldberg

Executive New Hires/Exits in the Last 12 Months

Hire1
Exits0

Amentum has made strategic appointments to bolster its leadership in key growth areas such as strategy and innovation. The company is also undergoing a significant merger with Jacobs' Critical Mission Solutions, which will involve future leadership integration.

New Appointments:

Dr. Robie I. Samanta Roy, Dr. Robie I. Samanta Roy appointed as Chief Strategy and Innovation Officer to lead Amentum's strategic growth and innovation initiatives.

Technology (Tech Stack) used by Amentum

Discover the tools Amentum uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

Amentum Email Formats and Examples

Amentum typically utilizes a standard corporate email format, most commonly [first_initial][last] or [first].[last]@[companydomain].com. Based on common patterns and public profiles, the [first].[last] format is prevalent.

[first].[last]@amentum.com

Format

jane.doe@amentum.com

Example

90%

Success rate

News and media

Amentum News / Business WireFebruary 20, 2024

Amentum News: Jacobs, Amentum, Carlyle and PAI Partners Announce Definitive Agreements for Sale of Jacobs’ Critical Mission Solutions and Cyber & Intelligence Businesses, to Merge with Amentum

Jacobs, Amentum, Carlyle, and PAI Partners announced definitive agreements for Jacobs to separate its Critical Mission Solutions (CMS) and Cyber & Intelligence businesses, which will then be merged with Amentum. The combined organization, a privately-held, independent technology solutions prime, will be acquired by Carlyle and PAI Partners. John Heller, current CEO of Amentum, will be CEO of the combined entity....more

Amentum NewsOctober 24, 2023

Amentum Names Dr. Robie I. Samanta Roy as Chief Strategy and Innovation Officer

Amentum announced the appointment of Dr. Robie I. Samanta Roy (Robby) as Chief Strategy and Innovation Officer. In this role, Dr. Samanta Roy will lead Amentum’s strategic growth initiatives, further develop the company’s technology-enabled solutions, and foster a culture of innovation....more

Amentum NewsJanuary 9, 2024

Amentum Awarded $995M Agile Combat Support Contract by the U.S. Air Force

Amentum was awarded a $995 million indefinite-delivery/indefinite-quantity (IDIQ) contract by the U.S. Air Force to provide agile combat support services. This contract aims to enhance mission readiness and operational capabilities for the Air Force across various global locations....more

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