Website & contact details
- Group website
- The site of this company’s group or brand.
Amentum International Nuclear Services Limited
- Incorporated
- 10 August 2005 (21 years)
- Previously known as
- CH2M Hill International Nuclear Services Ltd (until 30 September 2024)
- Industry
- Other engineering activities (71129)
- Directors
- Accounts type
- Full
- Region
- North West
- Address
- 305 Bridgewater PlaceBirchwood ParkWarringtonWA3 6XF
Filing status
- Accounts due
- 30 September 2026 (overdue)
- Last accounts
- 27 September 2024
- Conf. stmt due
- 5 September 2027
- Last conf. stmt
- 22 August 2026
Late accounts bring an automatic penalty and can get a company struck off.
Officers 2 active
Officer details are public data from the Companies House register.
Director · Appointed 7 November 2024
British
Born September 1967 (59)
Prentice, Joshua David
Secretary · Appointed 1 June 2024
Officer history (35 former)
21 April 2026
Resigned Fowler, Jonathan Paul as Director
7 May 2025
Appointed Fowler, Jonathan Paul as Director
7 November 2024
7 November 2024
1 June 2024
Appointed Prentice, Joshua David as Secretary
1 June 2024
Resigned Roberts, Geoffrey as Secretary
12 January 2024
21 August 2023
Appointed Roberts, Geoffrey as Secretary
21 August 2023
Resigned Holman, Rhona Mary as Secretary
10 February 2023
Appointed Holman, Rhona Mary as Secretary
10 February 2023
Resigned Chaudhary, Tejender Singh, Mr as Secretary
1 December 2021
1 December 2021
16 August 2021
16 August 2021
9 December 2020
30 November 2020
30 November 2020
3 June 2019
3 June 2019
3 June 2019
3 June 2019
21 March 2018
29 January 2018
29 January 2018
31 December 2017
Resigned Baker, Jonathan as Director
3 February 2017
3 February 2017
3 February 2017
14 July 2014
Appointed Chaudhary, Tejender Singh, Mr as Secretary
14 July 2014
14 July 2014
26 June 2014
Resigned Wright, Beverley Ann as Secretary
30 May 2014
Resigned Mckelvy, Michael Ellis as Director
1 January 2014
Resigned Mcintire, Lee A as Director
15 May 2012
Resigned Bryson Mclean, Margaret as Secretary
15 May 2012
Appointed Wright, Beverley Ann as Secretary
3 May 2011
3 May 2011
Resigned Santee, Melanie Catherine as Director
3 May 2011
Appointed Baker, Jonathan as Director
26 July 2010
Appointed Mckelvy, Michael Ellis as Director
15 May 2010
Resigned Card, Robert G. as Director
10 November 2008
Appointed Card, Robert G. as Director
10 November 2008
Appointed Santee, Melanie Catherine as Director
10 November 2008
Resigned Iapalucci, Samuel Herman as Director
10 November 2008
Resigned Dehn, William, Mr. as Director
6 May 2008
Appointed Mcintire, Lee A as Director
6 May 2008
Resigned Benjamin, Jeffrey as Director
6 May 2008
Resigned Polcyn, John as Director
6 May 2008
Resigned Ebben, Michael Denis as Director
6 May 2008
Resigned Rengel, Michael James as Director
6 May 2008
Resigned Tuor, Nancy Rai as Director
6 May 2008
Appointed Dehn, William, Mr. as Director
8 May 2007
Appointed Benjamin, Jeffrey as Director
23 April 2007
Resigned Roberson, Jessie as Director
5 November 2006
Appointed Roberson, Jessie as Director
27 September 2006
Appointed Rengel, Michael James as Director
27 September 2006
27 September 2006
Appointed Polcyn, John as Director
27 September 2006
Appointed Iapalucci, Samuel Herman as Director
27 September 2006
Resigned Harbert, Richard Ray as Director
9 May 2006
Resigned Iotti, Robert Charles as Director
10 August 2005
Appointed Iotti, Robert Charles as Director
10 August 2005
10 August 2005
Appointed Harbert, Richard Ray as Director
10 August 2005
10 August 2005
Appointed Ebben, Michael Denis as Director
10 August 2005
10 August 2005
Appointed Tuor, Nancy Rai as Director
10 August 2005
10 August 2005
Appointed Bryson Mclean, Margaret as Secretary
10 August 2005
Ownership 1 active
People and entities with significant control, from the Companies House PSC register
Corporate entity · Notified 5 June 2024
Owns 75–100% of shares
Holds 75–100% of voting rights
Right to appoint and remove directors
Private Limited Company
Reg. no. 15475788
Former controllers (1)
5 June 2024
Ceased CH2M Hill Holdings Limited — Owns 75–100% of shares
Group structure 14 companies
Ownership group derived from the Companies House PSC register
Amentum Clean Energy Limited Owns 75–100% of shares
Alkali Metal Processing Limited Owns 25–50% of shares
Amentum Clean Energy International Limited Owns 75–100% of shares
Fast Reactor Technology Limited Owns 50–75% of shares
PWR Power Projects Limited Owns 25–50% of shares
Amentum E&C Limited Owns 75–100% of shares
Amentum Enterprise Asset Solutions Construction Limited Owns 75–100% of shares
Amentum Enterprise Asset Solutions Limited Owns 75–100% of shares
Amentum International Nuclear Services Limited This company Owns 75–100% of shares
Cavendish Dounreay Partnership Limited Owns 25–50% of shares
Dounreay Site Restoration Limited Owns 75–100% of shares
Energy, Safety and Risk Consultants (UK) Limited Owns 75–100% of shares
National Nuclear Corporation Limited Owns 75–100% of shares
Filings 142
| Date | Description | Made Up To | Pages | |
|---|---|---|---|---|
| 28 August 2026 | Confirmation statement with no updates | 22 August 2026 | ||
| 21 April 2026 | Termination of appointment of a director | |||
| 18 April 2026 | Full accounts | 27 September 2024 | ||
| 3 December 2025 | Compulsory strike-off action has been discontinued | |||
| 2 December 2025 | First Gazette notice for compulsory strike-off |
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