Penetration Testing Services for Energy and Utilities
Power generation, transmission, and distribution systems run on legacy protocols, remote vendor connections, and control systems never built for modern threats. Testing finds those gaps: IT/OT borders, old protocols and third-party access. Each gets checked against IEC 62443 requirements. Nothing runs against a live system unless your engineers agree first.
Vendor Connections Rarely Get Reviewed After Installation
An OEM installs a control system, sets up remote access for maintenance and support, and the project closes. That access path often stays active for years, long after the original vendor relationship changes or the maintenance contract ends.
Each unreviewed connection can create a path into systems that manage physical infrastructure, not just data. Testing identifies active vendor and third-party access points and shows exactly what systems, services, and network segments each connection can reach.
Four Places Vendor Risk Concentrates
Remote Access Inventory
Active vendor and OEM remote access paths get identified, including connections nobody currently tracks as still open.
IT/OT Boundary Testing
The segmentation between corporate IT and operational control systems gets tested directly, confirming whether it holds under a real attempt.
Legacy Protocol Assessment
Protocols like Modbus and DNP3 run much of this infrastructure without built-in authentication. Testing identifies where that gap becomes an exploitable path.
IEC 62443 Requirement Alignment
Findings map to the specific IEC 62443 requirements relevant to your environment, turning vendor access risk into documented evidence.
Find Out What Vendor Access Is Still Open
A Clear Map of Who Can Reach What
Most organizations discover more active remote access paths than their records show. This engagement produces the accurate list your team can act on.
Documented access findings give procurement and security teams concrete evidence to use when reviewing vendor relationships, renewing contracts, or removing access that no longer supports an active business need.
Requirement alignment findings serve as documentation for regulatory reporting or cyber insurance requirements specific to critical infrastructure.
Testing Methods Matched to What Each System Can Tolerate
NERC CIP-005-7 makes this DivIHN's baseline, not an option. Requirements 2.4 and 2.5 require visibility into every active vendor remote access session on high and medium impact systems, and the ability to terminate one on demand. Violations carry penalties up to $1 million per violation per day, and CIP-010 sets its own testing schedule, including an active assessment at least every 36 months for high and medium impact systems.
Findings that touch NERC CIP requirements get flagged separately in the report, alongside the Risk Impact Brief for leadership, the Technical Pentest Report for your operations and security teams, and the Attestation Letter your auditor can review directly.
What Operations and Security Teams Ask First
Why does vendor remote access matter for critical infrastructure security?
Vendor and OEM remote access often stays active long after installation or contract end, creating a persistent path into control systems that few organizations actively track or review.
Will testing affect grid operations or production systems?
Testing methods get matched to what each system can safely tolerate. Passive analysis applies where a system can't absorb active testing, and any active testing is scheduled and confirmed with your engineering team in advance.
What happens if a system behaves unexpectedly during testing?
Testing stops immediately. A rollback plan and a named engineering contact are confirmed before any active test begins.
Does this include our vendor and OEM remote access connections?
Yes. Active vendor and third-party remote access paths get identified and tested as part of the engagement.
Does the report map to IEC 62443?
Yes. Findings map to the specific IEC 62443 requirements relevant to your environment.
Is a retest included if we close a Critical or High finding?
Yes, at no additional cost. The retest window is established at kickoff, with scheduling coordinated around the operational requirements of the affected control system.