Principal OT Cybersecurity Consultant

Jacobs; Dublin; Hybrid; EUR 110,000 - 180,000; Full time

Job summary

Jacobs is seeking a Principal OT Cyber Security Engineer in Ireland to lead design, integration and testing of OT security solutions across critical infrastructure. You will guide risk-informed decisions, shape secure architectures, and drive governance with clients and regulators.

You will leverage deep OT/ICS knowledge, engage stakeholders at all levels, and contribute to business development through technical input and proposals.

Qualifications

• Extensive OT cybersecurity experience in CNI or industrial environments.
• In-depth knowledge of OT/ICS tech (SCADA, DCS, PLCs, RTUs, industrial networks, safety systems).
• Familiarity with IEC 62443, NIST CSF, ISO 27000, MITRE ATT&CK, NIS/NIS2.
• Excellent stakeholder engagement and ability to communicate risk-informed security.

Responsibilities

• Lead design, integration and security testing of OT cybersecurity solutions.
• Develop OT security assessment methodologies and security requirements for complex environments.
• Implement robust security risk management processes, including accreditation activities with clients and regulators.
• Conduct comprehensive security reviews, audits and assessments of OT systems.
• Provide expert OT cybersecurity governance and advisory to internal and external stakeholders.
• Contribute to business development with proposals, solution shaping, and technical input to bids.
• Represent Jacobs in client meetings, technical workshops, and industry forums.

Skills

OT cybersecurity

CNI experience

SCADA / DCS / PLCs

IT/OT security integration

IEC 62443 / NIS2 / MITRE ATT&CK

Stakeholder engagement

Security governance

Secure lifecycle management

Cloud & edge OT integration

Job description

At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good.

Your impact

Principal OT Cyber Security Engineer – Ireland

We are seeking an experienced Principal OT Cyber Security Engineer to join our expanding Cyber Security team. This is an exciting opportunity to work on high‑impact projects across a diverse client portfolio, including Critical National Infrastructure sectors such as Rail, Aviation, Highways, Water, Energy, Power, and Defence.

In this senior role, you will lead activities across the full lifecycle of OT (Operational Technology) security engineering, from design and development to integration, testing, assurance, and in‑service support. You will act as a trusted technical expert, guiding stakeholders, shaping solutions, and supporting business growth.

Key Responsibilities

Technical Leadership & Delivery

• Lead the design, integration, and security testing of OT cybersecurity solutions.
• Develop OT and ICs cybersecurity assessment methodologies and define security requirements for complex environments.
• Implement robust security risk management processes, including participation in accreditation activities with clients and regulatory bodies.
• Conduct comprehensive security reviews, audits, and technical assessments of OT systems.

Governance, Assurance & Advisory

• Provide expert-level OT cybersecurity governance, technical advice, and assurance to internal and external stakeholders.
• Maintain deep knowledge of relevant OT security standards, regulations, and emerging threats (e.g., IEC 62443, NIS2, ISO/IEC 27019).

Business Development

• Contribute to or lead business development initiatives, including proposal writing, solution shaping, and technical input to bids.
• Represent the organisation in client meetings, technical workshops, and industry forums.

Here’s what you’ll need

• Extensive experience in OT cybersecurity, ideally gained within Critical National Infrastructure (CNI) or other industrial and operational environments.
• Strong understanding of OT/ICS technologies commonly used across CNI sectors, such as SCADA, DCS, PLCs, RTUs, industrial networking, and safety systems.
• Hands‑on experience with security engineering technologies across both IT and OT networks (e.g., endpoint protection tools, firewalls, intrusion detection systems).
• Familiarity with key standards, frameworks, and regulations, including IEC 62443, NIST CSF, the ISO 27000 series, MITRE ATT&CK, and NIS/NIS2.
• Excellent stakeholder engagement and communication skills, with the ability to articulate threat‑based and risk‑informed security considerations in clear business terms, enabling risk owners to make proportionate and well‑informed decisions.
• Understanding of core design principles related to operational safety, reliability, resilience, and secure system lifecycle management.
• Awareness of cloud and edge technology integration within OT environments.

#DigitalUKI #CyberPhysicalSystems #IndustrialControlSystems #ICS#SCADA #IIoT #Industry40 #DigitalEngineering

Joining Jacobs not only connects you locally but globally. Our values stand on a foundation of safety, integrity, inclusion and belonging. We put people at the heart of our business, and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees.

With safety and flexibility always top of mind, we’ve gone beyond traditional ways of working so you have the support, means and space to maximize your potential. You’ll uncover flexible working arrangements, benefits, and opportunities, from well‑being benefits to our global giving and volunteering program, to exploring new and inventive ways to help our clients make the world a better place. No matter what drives you, you’ll discover how you can cultivate, nurture, and achieve your goals – all at a single global company. Find out more about life at Jacobs.

We aim to embed inclusion and belonging in everything we do. We know that if we are inclusive, we’re more connected and creative. We accept people for who they are, and we champion the richness of different perspectives, lived experiences and backgrounds in the workplace, as a source of learning and innovation. We are committed to building vibrant communities within Jacobs, including through our Jacobs Employee Networks, Communities of Practice and our Find Your Community initiatives, allowing every employee to find connection, purpose, and belonging.Find out more about ourJacobs Employee Networks here.

Jacobs partners with VERCIDA to help us attract and retain talent from a wide range of backgrounds. For greater online accessibility please visit https//www.vercida.com/uk/employers/jacobs to view and access our roles.

As a disability confident employer, we will interview disabled candidates who best meet the criteria. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

We value collaboration and believe that in‑person interactions are crucial for both our culture and client delivery. We empower employees with our hybrid working policy, allowing them to split their work week between Jacobs offices/projects and remote locations enabling them to deliver their best work.

Your application experience is important to us, and we’re keen to adapt to make every interaction even better. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team via Careers Support.