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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers 38
  • 1
    Fallon, Mark Dean
    Born in February 1970
    Individual (3 offsprings)
    Officer
    2011-05-03 ~ 2014-07-14
    OF - Director → CIF 0
  • 2
    Dehn, William, Mr.
    Born in January 1947
    Individual (1 offspring)
    Officer
    2008-05-06 ~ 2008-11-10
    OF - Director → CIF 0
  • 3
    Iotti, Robert Charles
    Born in November 1941
    Individual (1 offspring)
    Officer
    2005-08-10 ~ 2006-05-09
    OF - Director → CIF 0
  • 4
    Roberson, Jessie
    Born in August 1958
    Individual (1 offspring)
    Officer
    2006-11-05 ~ 2007-04-23
    OF - Director → CIF 0
  • 5
    Holman, Rhona Mary
    Individual (42 offsprings)
    Officer
    2023-02-10 ~ 2023-08-21
    OF - Secretary → CIF 0
  • 6
    Hannis, Samuel James, Mr
    Born in May 1978
    Individual (24 offsprings)
    Officer
    2017-02-03 ~ 2019-06-03
    OF - Director → CIF 0
  • 7
    Tuor, Nancy Rai
    Born in April 1948
    Individual (1 offspring)
    Officer
    2005-08-10 ~ 2008-05-06
    OF - Director → CIF 0
  • 8
    Thurston, Mark John
    Born in January 1967
    Individual (25 offsprings)
    Officer
    2014-07-14 ~ 2017-02-03
    OF - Director → CIF 0
  • 9
    Benjamin, Jeffrey
    Born in June 1962
    Individual (1 offspring)
    Officer
    2007-05-08 ~ 2008-05-06
    OF - Director → CIF 0
  • 10
    Polcyn, John
    Born in August 1950
    Individual (2 offsprings)
    Officer
    2006-09-27 ~ 2008-05-06
    OF - Director → CIF 0
  • 11
    Miles, Sally Linda Joyce
    Born in September 1979
    Individual (40 offsprings)
    Officer
    2019-06-03 ~ 2021-12-01
    OF - Director → CIF 0
  • 12
    Prentice, Joshua David
    Individual (15 offsprings)
    Officer
    2024-06-01 ~ now
    OF - Secretary → CIF 0
  • 13
    Lutwyche, Peter Robert
    Born in November 1962
    Individual (12 offsprings)
    Officer
    2019-06-03 ~ 2020-11-30
    OF - Director → CIF 0
  • 14
    Mckelvy, Michael Ellis
    Born in March 1959
    Individual (2 offsprings)
    Officer
    2010-07-26 ~ 2014-05-30
    OF - Director → CIF 0
  • 15
    Roberts, Geoffrey
    Individual (50 offsprings)
    Officer
    2023-08-21 ~ 2024-06-01
    OF - Secretary → CIF 0
  • 16
    Ebben, Michael Denis
    Born in August 1947
    Individual (1 offspring)
    Officer
    2005-08-10 ~ 2008-05-06
    OF - Director → CIF 0
  • 17
    White, Clive Thomas
    Born in May 1962
    Individual (19 offsprings)
    Officer
    2020-11-30 ~ 2021-08-16
    OF - Director → CIF 0
  • 18
    Wright, Beverley Ann
    Individual (41 offsprings)
    Officer
    2012-05-15 ~ 2014-06-26
    OF - Secretary → CIF 0
  • 19
    Santee, Melanie Catherine
    Born in November 1961
    Individual (2 offsprings)
    Officer
    2008-11-10 ~ 2011-05-03
    OF - Director → CIF 0
  • 20
    Fowler, Jonathan Paul
    Born in July 1971
    Individual (1 offspring)
    Officer
    2025-05-07 ~ now
    OF - Director → CIF 0
  • 21
    Hamer, Benjamin Alexander
    Born in April 1968
    Individual (14 offsprings)
    Officer
    2018-01-29 ~ 2019-06-03
    OF - Director → CIF 0
  • 22
    Rengel, Michael James
    Born in December 1946
    Individual (1 offspring)
    Officer
    2006-09-27 ~ 2008-05-06
    OF - Director → CIF 0
  • 23
    Baker, Jonathan
    Born in June 1968
    Individual (4 offsprings)
    Officer
    2011-05-03 ~ 2017-12-31
    OF - Director → CIF 0
  • 24
    Shelton, Brian R
    Born in April 1961
    Individual (25 offsprings)
    Officer
    2017-02-03 ~ 2018-01-29
    OF - Director → CIF 0
  • 25
    Mcintire, Lee A
    Born in January 1949
    Individual (2 offsprings)
    Officer
    2008-05-06 ~ 2014-01-01
    OF - Director → CIF 0
  • 26
    Wiemelt, Karen
    Born in November 1963
    Individual (6 offsprings)
    Officer
    2021-08-16 ~ 2024-01-12
    OF - Director → CIF 0
  • 27
    Bryson Mclean, Margaret
    Individual (3 offsprings)
    Officer
    2005-08-10 ~ 2012-05-15
    OF - Secretary → CIF 0
  • 28
    Linseisen, Anita
    Born in November 1965
    Individual (8 offsprings)
    Officer
    2021-12-01 ~ 2024-11-07
    OF - Director → CIF 0
  • 29
    Card, Robert Gordon
    Born in February 1953
    Individual (3 offsprings)
    Officer
    2005-08-10 ~ 2006-09-27
    OF - Director → CIF 0
    Card, Robert G.
    Born in February 1953
    Individual (3 offsprings)
    Officer
    2008-11-10 ~ 2010-05-15
    OF - Director → CIF 0
  • 30
    Shaw, Martin Warwick
    Born in September 1967
    Individual (12 offsprings)
    Officer
    2024-11-07 ~ now
    OF - Director → CIF 0
  • 31
    Iapalucci, Samuel Herman
    Born in July 1952
    Individual (1 offspring)
    Officer
    2006-09-27 ~ 2008-11-10
    OF - Director → CIF 0
  • 32
    Chaudhary, Tejender Singh, Mr
    Individual (67 offsprings)
    Officer
    2014-07-14 ~ 2023-02-10
    OF - Secretary → CIF 0
  • 33
    Ellis, David
    Born in November 1972
    Individual (20 offsprings)
    Officer
    2018-03-21 ~ 2020-12-09
    OF - Director → CIF 0
  • 34
    Harbert, Richard Ray
    Born in July 1945
    Individual (1 offspring)
    Officer
    2005-08-10 ~ 2006-09-27
    OF - Director → CIF 0
  • 35
    SWIFT INCORPORATIONS LIMITED
    01945937
    26, Church Street, London
    Dissolved Corporate (13 parents, 100355 offsprings)
    Officer
    2005-08-10 ~ 2005-08-10
    OF - Nominee Secretary → CIF 0
  • 36
    ENERGY, SECURITY AND TECHNOLOGY UK LIMITED
    15475788
    305, Bridgewater Place, Birchwood Park, Warrington, United Kingdom
    Active Corporate (14 parents, 7 offsprings)
    Person with significant control
    2024-06-05 ~ now
    PE - Ownership of voting rights - 75% or moreCIF 0
    PE - Right to appoint or remove directorsCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
  • 37
    INSTANT COMPANIES LIMITED
    01546338
    1, Mitchell Lane, Bristol, Avon
    Dissolved Corporate (13 parents, 46629 offsprings)
    Officer
    2005-08-10 ~ 2005-08-10
    OF - Nominee Director → CIF 0
  • 38
    CH2M HILL HOLDINGS LIMITED
    12661700 07262036
    Cottons Centre, Cottons Lane, London, United Kingdom
    Active Corporate (11 parents, 6 offsprings)
    Person with significant control
    2020-07-14 ~ 2024-06-05
    PE - Ownership of shares – 75% or moreCIF 0
    PE - Right to appoint or remove directorsCIF 0
    PE - Ownership of voting rights - 75% or moreCIF 0
parent relation
Company in focus

AMENTUM INTERNATIONAL NUCLEAR SERVICES LIMITED

Period: 2024-09-30 ~ now
Company number: 05532606
Registered names
AMENTUM INTERNATIONAL NUCLEAR SERVICES LIMITED - now
Standard Industrial Classification
71129 - Other Engineering Activities

Related profiles found in government register
  • AMENTUM INTERNATIONAL NUCLEAR SERVICES LIMITED
    Info
    CH2M HILL INTERNATIONAL NUCLEAR SERVICES LTD - 2024-09-30
    Registered number 05532606
    305 Bridgewater Place, Birchwood Park, Warrington WA3 6XF
    PRIVATE LIMITED COMPANY incorporated on 2005-08-10 (20 years 8 months). The status of the company number is Active.
    The last date of confirmation statement was made at 2025-08-22
    CIF 0
  • CH2M HILL INTERNATIONAL NUCLEAR SERVICES LIMITED
    S
    Registered number 05532606
    305, Bridgewater Place, Birchwood Park, Warrington, United Kingdom, WA3 6XG
    Corporate in Companies House, United Kingdom
    CIF 1
child relation
Offspring entities and appointments 1
  • 1
    CAVENDISH DOUNREAY PARTNERSHIP LIMITED
    - now 07868218 02992419... (more)
    BABCOCK DOUNREAY PARTNERSHIP LIMITED - 2013-10-24
    33 Wigmore Street, London
    Active Corporate (25 parents, 1 offspring)
    Person with significant control
    2016-04-06 ~ now
    CIF 1 - Ownership of voting rights - More than 25% but not more than 50% OE
    CIF 1 - Ownership of shares – More than 25% but not more than 50% OE

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.