Penetration Testing for UK Energy and Renewables
CREST-accredited penetration testing for UK energy and renewables: electricity and gas suppliers, network operators, renewable generators, EV charge point operators and the SCADA and OT-adjacent vendors selling into them. Evidence for the NIS Regulations 2018 and the NCSC Cyber Assessment Framework, across customer and trading portals, asset-monitoring platforms and EV charger backends. IT/OT-boundary safe.
- Unlimited retesting
- Unlimited pre-retesting
- No hidden fees
“I would highly recommend EJN Labs to any organisation seeking reliable, detailed, and well-managed penetration testing services, particularly for government or enterprise-level projects.”
“There wasn’t another company we could find that could deliver what we needed in the timeframe we needed. The client loved it, and we got instant ROI from the engagement.”
systems make up most energy and renewables estates we test: customer and trading portals, asset-monitoring platforms and EV charger backends, each with its own account, device and vendor boundaries to check.
What the NIS Regulations & NCSC CAF Expect
NIS Regulations 2018. Large electricity generators, network operators and gas transporters that meet the thresholds set out in the Regulations, measured by factors such as generation capacity or the number of final customers supplied (250,000 for electricity), are designated Operators of Essential Services, with Ofgem as competent authority. Regulation 10 requires appropriate and proportionate technical and organisational measures, judged against the state of the art, having regard to guidance from the competent authority. Penetration testing is never named in the Regulations, and Ofgem does not itself mandate a test; a scoped test is one way to evidence the Regulation 10 duty. Maximum penalty for a serious failure is £17 million. See our guide to NIS Regulations penetration testing. NIS Regulations 2018.
NCSC Cyber Assessment Framework. Where NIS designation applies, security is assessed against the NCSC Cyber Assessment Framework, which is outcome-based rather than a fixed checklist. The CAF asks for objective evidence that you manage vulnerabilities effectively, and a scoped penetration test is one accepted form of that evidence. NCSC CAF.
OT remote access, tested safely. Vendor remote-access pathways and update paths into operational technology draw increasing scrutiny from energy licensees and their suppliers. We test from the IT side of the IT/OT boundary: remote-access services, privileged command interfaces and authentication on the systems that talk to operational technology. We do not test live control systems, and any work that reaches towards OT infrastructure only goes ahead against an agreed safe test plan, with your engineering team, defined change windows and a kill switch. See our guide on what OT security leads ask SCADA suppliers about RIIO.
Who we test for. Electricity and gas suppliers, network operators, renewable generators (wind, solar and battery storage), EV charge point operators and e-mobility platforms, energy trading and market-data firms, and the SCADA or OT-adjacent vendors selling into them. For the regulatory-scoping question itself, see our guide on which energy companies are in scope of Ofgem NIS.
SCOPE
What We Test for UK Energy & Renewables
Customer & Trading Portals
Domestic and business customer accounts, meter-reading and billing dashboards, and energy trading portals used by traders and analysts. Meter-to-account separation so one customer cannot reach another’s usage or billing data, tariff and balance manipulation, and IDOR across customer and trading records.
EV Charging & CPO Platforms
Charge point operator platforms, driver and fleet-charging apps, and charger management backends. Charger identity and enrolment, session and billing integrity, remote-command authorisation, and the roaming boundary between charge point operators and e-mobility service providers over OCPP and OCPI.
Renewables & Asset Monitoring
Solar, wind and battery-storage asset-monitoring platforms and device fleets, tested from the cloud side. Device enrolment, per-device identity and keys, fleet-ownership boundaries, and remote-command authorisation across distributed generation sites.
OT Remote Access & SCADA Interfaces
SCADA and industrial remote-access portals, engineering workstations and vendor support channels, tested from the IT side of the IT/OT boundary. Privileged command interfaces, authentication and vendor remote-access pathways. We do not test live control systems; work that reaches towards OT infrastructure only goes ahead against an agreed safe test plan.
Trading & Market APIs
APIs behind energy trading platforms, market-data feeds and third-party aggregator or grid-operator integrations. OWASP API Top 10 testing for object-level authorisation, rate and quota abuse, and the trust boundary between your platform and the systems it connects to.
External Perimeter & Remote Access
External-facing infrastructure supporting control-room, engineering and back-office functions: VPN gateways, remote-access services, exposed management interfaces and cloud consoles. CREST methodology identifies exposed services, weak authentication and unpatched systems reachable from the internet.
Red Team
Multi-week assume-breach engagements scoped to your IT estate: spear phishing against control-room, engineering and finance staff, persistent command and control, and lateral movement testing up to the IT/OT boundary. Live operational technology is out of scope for a red team engagement.
Phishing Defence
Targeted phishing simulation against control-room, engineering, procurement and finance staff, using energy-sector-aware lures such as supplier invoice fraud and outage or incident notifications.
OUR PROCESS
From Scope to Attestation in 4-6 Weeks
Scoping Call
30-minute technical scoping call covering customer, trading, asset-monitoring and EV-charging systems in scope, rules of engagement, the IT/OT boundary and safe testing windows. Fixed-price quote within 24 hours.
Active Testing
3-15 days of hands-on testing by CREST-certified UK-based pen testers, against non-production environments or a defined safe-test window wherever operational continuity matters. Daily status updates.
Reporting
Executive summary plus full technical report with CVSS scores, reproduction steps, screenshots, and specific remediation. 60-minute walkthrough call.
Free Retest
After remediation, we retest at no extra charge. Letter of attestation provided for NIS Regulations evidence, NCSC CAF submissions, or buyer due diligence.
CREDENTIALS
Verified Accreditations Auditors Accept
Every credential below is independently verifiable. UK procurement teams, FCA supervisors, ISO 27001 / SOC 2 auditors, and cyber insurance underwriters all recognise these standards.
GET YOUR QUOTE
Get a CREST energy pen test quote in 24 hours
A fixed-price quote back in one business day, from a named CREST assessor. No sales pipeline, no chasing.
- CREST and IASME accredited. Testing your auditors and clients already recognise.
- Fast-track testing within 24 hours where required. Free retest of every fix included.
- Live findings via your client portal, not a four-week PDF.
- Fixed price from £3,500 for a single-role, single-app scope, agreed up front. Most engagements run £5,000 and up. No day-rate surprises.
Dan WilcocksonFounder, CelloriUnder NDA Further named references available on a scoping call.
- We reply within one business day with a fixed-price quote from a named CREST assessor.
- You approve the scope and we book a start date, usually within 24 hours.
- Live findings land in your client portal as we test, with a free retest of every fix.
Get your fixed pen test quote in 24 hours
Quote request received
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COMPLIANCE READY
Reports Aligned to Every Framework
Findings map to specific control references in each framework, so your audit team submits the report directly without translation work.
NIS Regulations 2018
Regulation 10 evidence of appropriate and proportionate security measures for in-scope essential-service operators. Penetration testing is never named in the Regulations.
NCSC CAF
Objective evidence for vulnerability-management outcomes. The CAF does not require a penetration test; testing is one form of evidence.
ISO 27001
Annex A 8.8 technical vulnerability management, once you declare that control applicable.
Cyber Essentials Plus
Often asked for by asset owners and public-sector energy buyers alongside NIS evidence. Certified directly by us as an IASME certification body.
UK GDPR
Article 32(1)(d) evidence that you regularly test the effectiveness of your security measures, for customer and billing data.
Cyber Insurance
Findings and remediation documented against the questions on your broker or insurer’s proposal form. Requirements vary by insurer and policy.
PRICING
Indicative Engagement Pricing
Fixed-price quotes confirmed during scoping. Free retest, executive summary, walkthrough call, and letter of attestation included.
Depends on service + scope
External / web / API / mobile single-target engagement. CREST-certified delivery. Around 3 to 5 working days from kickoff to report.
Get a fixed quoteDepends on service + scope
Multi-target combined engagement (web + API + external + AD), or single complex target. Typically 7-10 days.
Get a fixed quoteDepends on service + scope
Full-stack engagement (multiple cloud accounts, hybrid AD, complex web + API + mobile). Typically 12-15+ days.
Get a fixed quoteWHY EJN LABS
What You Get From Energy & Renewables Penetration Testing
Six concrete differentiators competitors don’t all match.
CREST-Certified Testers, Verifiable
Every test by a CREST-certified pen tester (CRT, CCT APP, CCT INF where applicable). Verify our company status at crest-approved.org.
24-Hour Startup, Where Required
From signed scope to active testing in a single business day for incident response, audit deadlines, or regulator-driven timelines.
Live Findings, Not 4-Week PDFs
Critical issues reported during testing through your client portal. Your team remediates while testing continues.
Audit-Ready Reports
Executive summary plus full technical report with CVSS scores and explicit framework mappings (ISO 27001, SOC 2, PCI DSS, FCA SYSC).
Free Retests, Standard
Verify remediation of every finding before close-out. Letter of attestation for audit submission included. Most competitors charge £1,500-£3,000 per retest.
UK-Based CREST Testers
Every engagement performed by vetted, UK-based CREST-certified testers, matched to your needs, security clearance, and compliance scope.
FAQ
Frequently Asked
Does Ofgem require us to have a penetration test?
Not directly. Ofgem is the competent authority for the NIS Regulations 2018 in the downstream gas and electricity sector, and Regulation 10 requires appropriate and proportionate security measures, not a named test. Ofgem typically assesses in-scope operators against the NCSC Cyber Assessment Framework, and a penetration test is one accepted way to evidence that you manage vulnerabilities effectively. See our guide on which energy companies are in scope of Ofgem NIS.
Can you test our EV charging platform, including OCPP and roaming integrations?
Yes. We test charge point operator platforms and driver or fleet-charging apps: charger identity and enrolment, session and billing integrity, remote-command authorisation, and the roaming boundary between charge point operators and e-mobility service providers over OCPP and OCPI.
Do you test our SCADA remote-access portal or the grid itself?
We test the IT side of the IT/OT boundary: SCADA and industrial remote-access portals, engineering workstations and vendor support channels, and the authentication and privileged-command interfaces on the systems that talk to operational technology. We do not test live control systems or the grid itself. Any work that reaches towards OT infrastructure only goes ahead against an agreed safe test plan with your engineering team.
Which energy and renewables organisations do you test for?
Electricity and gas suppliers, network operators, renewable generators (wind, solar and battery storage), EV charge point operators, energy trading and market-data firms, and SCADA or OT-adjacent vendors selling into the sector.
What’s different about testing an energy trading portal compared with a standard web app?
Meter-to-account separation so one customer cannot reach another’s usage or billing data, tariff and balance manipulation, fleet-level permissions for business and EV-fleet customers, and IDOR across trading and market-data records, on top of standard OWASP Top 10 coverage.
Can you support our RIIO cyber assurance evidence as a SCADA supplier?
We test your product, remote-access pathways and update paths, and provide a report your customers can review as part of their own assurance process. We do not assess your compliance with RIIO licence conditions directly; that sits with your Ofgem-licensed customer. See our guide on what OT security leads ask SCADA suppliers about RIIO.
Do you have experience testing live utility or grid infrastructure?
We have not tested live operational technology or grid control systems, and we would not do so without an agreed safe test plan and your engineering team’s sign-off. Our energy work focuses on the IT estate: customer and trading portals, asset-monitoring platforms, EV charging backends, APIs and the IT side of the IT/OT boundary.
Can you test the systems behind a water or wastewater operation?
Yes. We test customer account portals, operations dashboards and field service apps together, checking that customer data, asset records and work orders stay segregated by account, site and role. We also look at how field staff and contractors authenticate for remote access to operational systems, and whether a fault in a customer-facing app could be used to reach dashboards meant only for operations teams.
How do you handle remote OT access and change windows during testing?
We agree safe change windows with you before any testing touches operations dashboards or field service tools, and we test remote OT access paths and work-order authority separately from customer-facing systems. Our guide on IEC 62443 and water company testing looks at how these controls are commonly scoped for a water or wastewater provider.
What’s in the report?
Executive summary (board-ready), technical report with CVSS 3.1 scores, reproduction steps, screenshots, specific remediation guidance, and a 60-minute walkthrough call. Letter of attestation issued after free retest.
Do you sign NDAs?
Yes. We sign client-supplied NDAs as standard. Engagement data is protected under our ISO 27001 (BSI-audited) information security management system.
How quickly can you start?
From signed scope to active testing in 24 hours where required. Standard pipeline is 3-5 business days from initial scoping call to test start.
Are your testers UK-based and what certifications do they hold?
Every engagement is performed by vetted UK-based CREST-certified testers matched to your engagement based on security clearance, compliance scope, and sector specialism. Testers hold CREST certifications relevant to their discipline (CRT, CCT APP, CCT INF, CCSAM).
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get my Energy pen test scope
A CREST-certified UK-based pen tester will contact you within one business day with a fixed price aligned to your NIS Regulations, NCSC CAF and energy-sector needs.
