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AE

ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED

Blackburn
Large

Assystem Energy & Infrastructure Limited specializes in engineering and digital solutions for energy transition, focusing on sectors such as nuclear, renewable energy, and project management.

assystem.com ↗

Summary from the supplier’s website — unverified

Compare peers
Awarded
£10.9m
Live
8
Buyers
5
12m
£8.0m
At a glance
  • Quick answer
Profile
  • Social value
  • ESG & policies
  • Capabilities1
  • Buyer references
  • Accreditations
Track record · verified
  • KPI performance
  • Contracts8 / 12
  • Top buyers5
  • Category mix
  • Geography
  • Peers5
Trust & risk
  • Red flags0
  • Compliance
  • Modifications
  • News
Company
  • Companies House
  • Financial
  • Org tree
Quick answer — ASSYSTEM ENERGY & INFRASTRUCTURE LIMITEDUpdated 13 Jul 2026

At a glance · for buyers and watchdogs

ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED has won £10.9m across 5 public-sector buyers, with 8 live contracts. No active Companies House risk flags.

Why: top buyer UK Atomic Energy Authority at 73% · 0 active risk flags · 0 modifications.

Decision signals
0Active red flags
ActiveCompany status
8 of 12Live contracts
73%Top-buyer concentration
—Category exposure
0Contract modifications
If you're a buyer:CapabilitiesReferencesKPIComplianceWatchdog?FlagsModificationsConcentrationNews

Social value

Commitments mapped to the Government Social Value Model themes.

⚑ Self-reported
—

No social-value commitments yet

Jobs, skills, environmental, inequality and community commitments appear here once a claimed supplier attributes them to awarded contracts, or once we detect them on the supplier’s website.

ESG & policies vault · 0/5

Key governance & sustainability policies. Published documents link out; missing ones are greyed.

↔ Cross-checked
Net-zero planNot provided✓
Modern slavery statementNot provided✓
EDI policyNot provided✓
Anti-briberyNot provided✓
Data protectionNot provided✓

Capabilities

What this supplier does, where they sit, who they sell to.

◐ From website & notices
Sectors served · 1/8
Central government✓
Local government✓
NHS & health✓
Housing✓
Utilities & energy✓
Financial services✓
Education✓
Defence✓
Services · 3
Project Management ConsultancySite Characterization, Licensing and Environmental ServicesConstruction Management and Commissioning
Frameworks & DPS · 1 from notices
  • Ecological Consultancy ServicesAshford Borough Council · £98k

Extracted automatically from assystem.com on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Case studies

Delivery stories the supplier has published, with sector and outcome.

⚑ Self-reported
—

No case studies yet

Once a claimed supplier publishes delivery stories — the buyer, the sector, what was delivered and the outcome — they appear here.

Buyer references

Named public-sector contacts who have agreed to act as a reference.

✓ Confirmed by buyer
—

No buyer references yet

Public-sector buyers can confirm they'll act as a reference for this supplier. Confirmed references — with the contract they relate to — show here.

Accreditations & memberships

Independently issued. Verification dates cross-checked against issuer registers.

↔ Cross-checked
—

No accreditations recorded

B-Corp, ISO, Cyber Essentials, Living Wage and similar credentials appear here once added by a claimed supplier and cross-checked against the issuing register.

KPI performance

Delivery, budget and satisfaction scores reported quarterly by buyers.

✓ Verified
84

No verified KPI scores yet

Once buyers report contract KPIs — delivery on time, on budget, satisfaction, adoption and accessibility — a weighted grade and breakdown appear here.

Contracts · 8 live · 4 historic

Pulled from Contracts Finder & Find a Tender. Most recent first.

✓ From notices
TitleBuyerCPVAwardedValueTermStatus
JDR Management Support Framework.
UK Atomic Energy Authority—01 Apr 2026£8.0m4 yrspending
Engineering Design Services Framework
Ukaea United Kingdom Atomic Energy Authority7132000001 Apr 2024£1.1m4 yrsLive
Ecological Consultancy Services
Ashford Borough Council7100000020 Nov 2023£98k6 yrsLive
Embedded Support Framework
Ukaea United Kingdom Atomic Energy Authority7133600001 Oct 2021£571k4 yrsClosed
UKAEA Engineering Design Services Framework
Ukaea United Kingdom Atomic Energy Authority7124200014 Mar 2020£1.1m—Closed
STEP WP5 - Fusion Power Plant - Breeder Blanket Design Challenge
Ukaea United Kingdom Atomic Energy Authority0934300018 Nov 2019£38k3 moClosed
SBRI FIP Challenge Application
Ukaea United Kingdom Atomic Energy Authority73210000———Live
JDR Management Support Framework.
UK Atomic Energy Authority————Live
Nuclear Energy Regulatory Justification Services Framework
DEPARTMENT FOR ENVIRONMENT, FOOD AND RURAL AFFAIRS71621000———Live
Engineering Design Services Framework
Ukaea United Kingdom Atomic Energy Authority71321000———Live
Total live value £1.2m · mean award £910k1–10 of 12

Top buyers · 5 buyers · top 3 = 100%

Share of awarded value. Concentration fires above 40% for any single buyer.

✓ From notices
1
UK Atomic Energy Authority
2 contracts
73%
since 2025
2
Ukaea United Kingdom Atomic Energy Authority
7 contracts
26%
since 2019
3
Ashford Borough Council
1 contract
1%
since 2023
4
DEPARTMENT FOR ENVIRONMENT, FOOD AND RURAL AFFAIRS
1 contract
0%
5
UK Industrial Fusion Solutions Ltd
1 contract
0%

Geography

Distribution of awarded value by buyer region.

✓ From notices
UK · schematic only
South East4 contracts
100%
London1 contract
0%
Region resolved for 74% of awarded value (by buyer postcode); the remainder lacks a usable address.

Peers

Suppliers with overlapping CPVs & buyers (last 24m). ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED highlighted.

✓ From notices
SupplierSME?Awarded · 24mContracts
AE
AECOM LIMITED
No£14.6m8
AE
ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED
No£8.0m—
AT
AtkinsAltrad
No£7.6m5
PE
Pellings LLP
Yes£2.8m1
PA
PURCELL ARCHITECTURE LIMITED
No£2.1m2
T&
Turner & Townsend Project Management Ltd
No£1.6m2
Compare peers →

Red flags · 0 active

Automated scan of Companies House status, charges and insolvency records.

✓ Verified
✓ Clean. No active risk signals from Companies House status, charges or insolvency records.

Compliance scorecard

Derived from Companies House filings — not a full supplier-assurance check.

↔ Cross-checked
Trading status
Active
Live at Companies House
Annual accounts
Up to date
Last made up to 31 Dec 2024
Confirmation statement
Up to date
Next due 01 Feb 2027
Outstanding charges
0
No charges registered
Insolvency history
None
No insolvency cases registered
Certifications (ISO, Cyber Essentials, Living Wage, B-Corp, modern-slavery) are supplier self-reported and appear once a claimed profile adds them.

Modifications

Variations to awarded contracts logged under Procurement Act 2023 s.74.

✓ From notices
±

No modifications recorded

No published contract variations for this supplier. Modification notices appear here as they are issued under the Procurement Act 2023.

News mentions

UK trade press & nationals, matched to this supplier.

◰

No news mentions found

We haven't matched any recent UK press coverage to this supplier. Mentions appear here automatically as they're published.

Companies House

Live sync — registered details, directors, PSC and SIC codes.

✓ Live sync

Registered details

Company no.
03148098
Status
Active
Type
Private limited
Incorporated
18 Jan 1996
Reg. office
Innovation Centre 1 Evolution Park, Haslingden Road, Blackburn, Lancashire, BB1 2FD
SIC codes
62020 · 70229 · 71122 · 82990
Last accounts
31 Dec 2024
Next accounts due
30 Sept 2026

Directors & PSC

  • MASON, Karen — secretary
    Appointed 01 Aug 2021
  • MASON, Karen — director
    Appointed 01 Aug 2021
  • BARBER, Simon Nicholas Earl — director
    Appointed 02 Nov 2020
  • CHABERT D'HIERES DE SEGUIN DE REYNIES, Damien Marie Philippe — director
    Appointed 08 Jun 2020
  • JEANNEAU, Christian Olivier — director
    Appointed 05 Apr 2018
  • Assystem Sa — person with significant control
    ownership of shares 75 to 100 percent · voting rights 75 to 100 percent · right to appoint and remove directors

Financial

Filed accounts from Companies House.

↔ From Cos House
£

No financial filings on record

Turnover, profit and headcount appear here once audited or micro-entity accounts are filed at Companies House.

Org tree

Group structure and ownership.

↔ From Cos House
ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED
03148098 · this company

Independent. No parent company or subsidiaries recorded at Companies House for this entity.