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Company · Warrington

Amentum International Nuclear Services Limited

Other engineering activities

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Official record Companies House · updated 27th September 2026 · Sources

Network

The large node is Amentum International Nuclear Services Limited. Red nodes are organisations, white nodes are people. Sign in free to explore further.

Who leads it

Previous officers 33

  1. Jonathan Paul Fowler 2025-2026 Director View profile
  2. Anita Linseisen 2021-2024 Director View profile
  3. Karen Wiemelt 2021-2024 Director View profile
  4. Clive Thomas White 2020-2021 Director View profile
  5. Peter Robert Lutwyche 2019-2020 Director View profile
  6. Sally Linda Joyce Miles 2019-2021 Director View profile
  7. David Ellis 2018-2020 Director View profile
  8. Benjamin Alexander Hamer 2018-2019 Director View profile
  9. Brian R Shelton 2017-2018 Director View profile
  10. Samuel James Hannis 2017-2019 Director View profile
  11. Mark John Thurston 2014-2017 Director View profile
  12. Mark Dean Fallon 2011-2014 Director View profile
  13. Jonathan Baker 2011-2017 Director View profile
  14. Michael Ellis Mckelvy 2010-2014 Director View profile
  15. Melanie Catherine Santee 2008-2011 Director View profile
  16. Robert G. Card 2008-2010 Director View profile
  17. Lee A Mcintire 2008-2014 Director View profile
  18. William Dehn 2008-2008 Director View profile
  19. Jeffrey Benjamin 2007-2008 Director View profile
  20. Jessie Roberson 2006-2007 Director View profile
  21. John Polcyn 2006-2008 Director View profile
  22. Michael James Rengel 2006-2008 Director View profile
  23. Samuel Herman Iapalucci 2006-2008 Director View profile
  24. Michael Denis Ebben 2005-2008 Director View profile
  25. Robert Gordon Card 2005-2006 Director View profile
  26. Richard Ray Harbert 2005-2006 Director View profile
  27. Robert Charles Iotti 2005-2006 Director View profile
  28. Nancy Rai Tuor 2005-2008 Director View profile
  29. Geoffrey Roberts 2023-2024 Secretary View profile
  30. Rhona Mary Holman 2023-2023 Secretary View profile
  31. Tejender Singh Chaudhary 2014-2023 Secretary View profile
  32. Beverley Ann Wright 2012-2014 Secretary View profile
  33. Margaret Bryson Mclean 2005-2012 Secretary View profile

Directors and secretaries as filed at Companies House.

Do you help lead this organisation? Set up its network · How it works

About

What it does
Other engineering activities
Incorporated
10/08/2005
Registered office
Warrington
Previous names
CH2M Hill International Nuclear Services LTD (until 30/09/2024)

Ownership

Owned by (2) iOwned byIndividuals and companies registered as having significant control over this company, from the Companies House PSC (persons with significant control) register. People whose ownership could not be confirmed to one individual are not listed as confirmed owners.

Group

  1. Amentum International Nuclear Services Limited is controlled by Energy, Security and Technology UK Limited
    Evidence
    active 75-100% shares, 75-100% voting, appoints directors · notified 2024-06-05 · source: Companies House PSC register
  2. Energy, Security and Technology UK Limited is controlled by CH2M Hill Holdings Limited
    Evidence
    ceased 75-100% shares, 75-100% voting, appoints directors · notified 2024-02-09, ceased 2024-06-06 · source: Companies House PSC register

Ultimately controlled by CH2M Hill Holdings Limited.

30 other companies in this group

Ownership paths are calculated from Companies House persons-with-significant-control filings. Each step shows the filed nature of control and dates; a step marked "ceased" is historical, not current.

Board analysis

Board DNA

How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.iBoard compositionCounted from the dated Companies House officer record: the current directors only, past directors excluded.

1 directors on the board

1.7y median 1.7y
average tenure
1.7y
longest tenure
0
directors past 6 years

First-time vs portfolio directors

Portfolio (1)

0
also govern a charity

Left in the last 12 months

Where else this board sits iWhere else this board sitsThe charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.

Professional services 6Construction 4Manufacturing 1Other services 1Utilities 1

The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.

Gaps to watch

  • A single director - no second pair of eyes on any decision

Where to look Suggested search: a second director to remove single-point control.

Sources

Official record from Companies House. Governance Register calculates the connections.

Record details
Company number
05532606
Status
Active
Type
Private Limited Company
Accounts next due
30/09/2026
Edition
Register edition compiled 27th September 2026
Labels
Official record from Companies House · Calculated derived by Governance Register.

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