Enterprise-Wide Security Architecture (IT and OT)

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Industrial Cyber Security for Transport

Enterprise-Wide Security Architecture (IT and OT)

Client Context

A major rail operator undertaking multiple concurrent technology programmes across operations, with significant IT/OT integration across ISA-95 Levels 1–4.

Ask / Requirement

A transport sector client engaged SIS to develop a risk-driven, enterprise-wide security architecture spanning IT and OT – aligned with business objectives and major technology initiatives across rail operations.

The requirement was to establish a consistent, business-aligned security blueprint across all ISA-95 levels, improve risk visibility, and define a clear transition path from current state to target state.

What We Delivered

SIS delivered a holistic Enterprise-Wide Security Architecture (EWSA) using SABSA aligned with IEC 62443, supported by a prioritised architecture roadmap and implementation plan.

The outcome provided the client with a single, coherent security reference architecture – with full traceability from business drivers to security controls – and a structured pathway to uplift cyber maturity across IT and OT environments.

Outcome

The organisation gained a defensible, unified security architecture capable of keeping pace with its technology programme. New initiatives could be assessed for security alignment before deployment, reducing rework and enabling consistent risk management across rail operations.

If you’d like to know more about our many years of experience in providing industrial cyber security solutions:

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Success Stories
Power

Meeting European Union
NIS Directive obligations

SIS’ bespoke approach towards the assessment of critical infrastructure enabled a UK power company to determine compliance to the EU NIS Directive, and to develop an improvement plan towards strengthening resilience to cyber threats.

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Oil & Gas

Technical vulnerability
and risk assessment of
OT infrastructure

Via a technical vulnerability and risk assessment of OT infrastructure for a gas pipeline company, SIS successfully assisted the gas pipeline company to understand their current-state risk posture in order to determine what an appropriate risk appetite (risk level) is, and the prioritisation of mitigation actions in order to reduce the level of risk exposure to cyber threats.

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Mining

Top-down, enterprise wide
security architecture

SIS adopted a top-down, risk-driven approach to develop an enterprise-wide security architecture for a resources company, driven by, and integrated with the organisation’s broader business strategy, focused on technology optimisation to deliver secure mine operations.

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Health

Stress & penetration
testing network connected
medical devices

SIS’ specialist industrial cyber security testers applied the latest exploit tools and techniques to perform stress and penetration testing of network connected medical device technologies, to assess risks to the reliability of devices, and ultimately the safety of patients.

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Water

Implementing a Cyber
Security Management
System (CSMS)

As a result of SIS’ Operate and Maintain services, a regional water agency in Australia was able to implement a Cyber Security Management System (CSMS) provides the organisational rigour to ensure infrastructure is resilient to escalating cyber threats, and ensuring the right security controls are in place to mitigate risk.

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Transport

Audit identifies
high-risk areas of focus
and remedial priorities

SIS’ industrial cyber security audit services enabled a government statutory authority to benchmark the security posture of state transport agencies, identifying cyber security risks and prioritisation of key actions for risk mitigation.

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Critical Manufacturing

Training helps metals
manufacturer create a
stronger security culture

SIS’ industry-leading industrial cyber security training was able to help a metals manufacturer create a stronger culture of security, harmonising with the organisation’s rigorous safety culture, fostering a commitment to industrial cyber security from plant operators and administrators, encouraging users to act responsibly and thus operate more securely.

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SIS conducted a risk assessment of our operational technology environment and we were very impressed with their approach, methodology, execution, and delivery. They are adaptable, technically astute, and demonstrated a strong ability to fully understand business requirements specific to the oil and gas sector.
PMO and GRC ConsultantOil and Gas
The project provided our organisation with a clear view of our cyber security maturity and highlighted the range of threats that could impact our systems at any time. As a result of the assessment, several mitigation steps have already been implemented based on SIS’ key recommendations.
SCADA and EMS ProgrammerEnergy Interconnection
SIS delivered an Information Security Management System framework that ensured governance was appropriately embedded across ICT operations, including business critical control systems. This significantly strengthened our audit compliance posture against recognised industry standards.
Chief Information OfficerWater Utility
SIS effectively identified the required security controls to ensure essential services such as patching, configuration management, data backup, and secure remote access were available across both IT and OT environments for our new ADMS platform. Their familiarity with OT security is exceptional.
ADMS Project ManagerElectricity Distribution
SIS’ tailored methodology for control systems testing demonstrated a high level of specialist expertise in this domain. They also showed strong flexibility in accommodating changing schedules and efficiently mobilising resources to meet critical production deadlines during a major network management system upgrade.
OT Security LeadEnergy Infrastructure
SIS consultants applied a professional and structured approach to a complex OT enablement scenario. This resulted in comprehensive designs covering key functional and non functional requirements, while also identifying security risks and the supporting process framework. SIS is best in class for IT and OT integration work.
Technology Program ManagerMining and Resources
SIS’ level of expertise in operational technology security is outstanding.
Senior Technology LeaderRail and Freight Transport

See how
your organisation
stacks up against
the benchmark

Put your organisation to the test with the SIS Industrial Cyber Security Assessment Scorecard.
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Winner – Cyber Consultant of the Year (SME). Finalist for Cyber Professional of the Year in Industries, Logistics & Critical Infrastructure, and a Finalist for GRC Provider of the Year.
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Tell us a bit about you

Our workshops are tailored, so please check any specific areas of interest you might have.