Operation Technology Advisory

Cyber-physical security based on ISA/IEC 62443 standards for Industrial Automation and Control Systems (IACS).

We help identify and reduce the growing risk across cyber-physical systems, with expert services for Operational Technology (OT) and Industrial Automation and Control Systems (IACS) businesses and suppliers.

New Operational Technology paradigms have created an urgent need for standardised cybersecurity best practices across IACS.

Understand, assess, and uplift your unique IACS/OT environment, based on the ISA/IEC 62443 industry standards for Industrial Automation and Control Systems (IACS). We work closely with partners, performing cyber maturity assessment across cyber-physical environments, spanning across OT cybersecurity program, technical control assessment and physical site assessments, to develop a prioritised risk remediation roadmap and roll out embedded security throughout your IACS.

  • Determine where risks lie across systems and networks

  • Prioritise risks and recommend remediation strategies

  • Reduce the likelihood of cyber incidents across IACS, via secure architecture and controls

  • Comply with OT industry standards for cybersecurity

Industrial systems owners, medical device manufacturers, transport operators, and critical infrastructure providers know cyber risk has grown significantly. It’s time to action security across your blended environments, with tailored expertise.

TS IEC62443 SUITE OF STANDARDS 0409245

What is OT security?

Operational Technology (OT) cyber security addresses the risks in hardware and software that controls, monitors, and changes industrial equipment, including its supporting environment, networks, and supply chain.

How can OT cyber security be accurately governed?

Thanks to the internationally recognised standards such as the ISA/IEC 62443 Series of Standards for Industrial Automation and Control Systems and the NIST Guide to OT Security 800-82r3, OT organisations can develop a solid foundational cyber framework, accurately assess risks, design secure systems and controls, and uplift their cyber maturity.

What is an OT Security Assessment?

An Operational Technology Security Assessment assesses the cyber-physical risks across people, processes and technology across your organisations OT environment and detail your current level of security based on system controls.

By knowing existing threats and how your current systems stand against them, you can create a fortified security roadmap, with initiatives that aligns with business goals and objectives, address organisation risks, support business operations and enable business growth.

Types of OT security assessments:

  • OT Security Program Maturity

  • OT Security Risk Assessment

  • Security Level Assessment for Technical Controls across Industrial Control Systems

The benefits of an OT cyber assessment

These three types of OT cyber assessments help organisations:

  • Understand requirements to ensure OT security aligns with and support sbusiness operations and compliance obligations
  • Accurately identify risks to business
  • Prioritise risk remediation efforts
    • Outline a security architecture with zones and conduits to support network segmentation requirements
  • Assess the security of controls across OT systems, including usage, technical controls, identity, and data confidentiality
    • Provide a benchmark and recommendations for controls uplift

OT cyber security assessment use cases


OT assessments may become essential when:

Our services can be tailored for sectors and industries that have specific OT cybersecurity frameworks, guidance or directives, including:

How can Tesserent help?

As New Zealand’s leading provider of full-service cybersecurity services in Australia and New Zealand, Tesserent is helping OT businesses increase their cyber maturity. Our OT security services include comprehensive reviews of all systems and documentation, including site visits and deep investigation. Our reports are structured to deliver clear, actionable takeaways and detailed architectures where required.

OT Cyber Security Management System Uplift

Our uplift service establishes an Operational Technology (OT) and Industrial Control System (IACS) Cybersecurity Program, leveraging the IEC 62443 series of standards or the NIST Guide to OT Security.

OT Security Risk Assessment

Our comprehensive IACS risk assessment across your systems is aligned to IEC 62443 Part 3-2: Security Risk Assessment for System Design.

Security Level Assessment for OT Technical Controls

Our technical control assessment verifies the effectiveness of your OT technical controls deployed within IACS systems and components, as outlined in IEC 62443 Part 3-3: System Security Requirements and Security Levels.

Industry-specific coverage

Our services can be tailored for sectors and industries that have specific OT cybersecurity frameworks, guidance or directives, including:

    Extended ISA/IEC 62443 Coverage

    Available upon request, including:

    • OT asset discovery

    • Patch management in the IACS environment

    • Implementation guidance for asset owners

    • IACS security lifecycle and use-cases

    • Security system conformance metrics

    • Product security development lifecycle requirements

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    Contact us

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    Security Specialist

    Tesserent is a full-service cybersecurity and secure cloud services provider, partnering with clients from all industries and all levels of government. Let’s talk.

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