OT Infrastructure Engineer / Consultant

Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving transformational change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data, and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals.

About The Role

As the Senior OT Infrastructure & Cyber Security Engineer, you will play a key role in the design, build, configuration and deployment of secure infrastructure supporting complex OT and industrial environments.

This is a hands‑on engineering role combining infrastructure, systems and cyber security expertise. You will work across Windows and Linux environments, physical and virtual infrastructure and industrial technology, supporting systems from initial design and build through integration, testing, commissioning and deployment.

Working closely with clients, vendors, design authorities and wider OT, network and cyber security teams, you will help resolve technical challenges, support system and vendor integration and ensure solutions are secure, resilient and delivered in line with agreed designs and standards.

Our work spans a range of client environments and locations, with opportunities to support both UK and international project deployments. Some current projects include periods working on client site in Dubai, so international travel opportunities are available for those with the flexibility to undertake them.

As a Senior OT Infrastructure & Cyber Security Engineer, you will:

• Design, build and configure physical and virtual server infrastructure within OT environments
• Design, build and support VMware environments
• Build, configure and support Windows Server and Linux-based infrastructure platforms
• Support the hosting, installation and integration of OT and industrial applications
• Configure and support Active Directory, Group Policy, DNS, DHCP and associated infrastructure services
• Implement resilient and highly available infrastructure supporting critical OT systems
• Support enterprise storage, backup, recovery and disaster recovery solutions
• Implement server and device hardening, patching and vulnerability remediation
• Undertake infrastructure health checks, troubleshooting and performance analysisSupport infrastructure migrations, upgrades and technology refresh programmes
• Undertake system and infrastructure testing and validation prior to deployment
• Support FAT, SAT, commissioning and production go-live activities
• Troubleshoot system, application and vendor integration issues during project delivery
• Produce high-quality HLDs, LLDs, build guides, configuration documentation, test plans, validation evidence and as-built documentation
• Work closely with OT, cyber security, network, application and engineering teams
• Provide technical consultancy and guidance to clients throughout project delivery

Requirements

You'll bring strong hands‑on infrastructure engineering experience, with the technical capability to deliver secure and resilient solutions within complex OT and industrial environments.

• Strong experience building, configuring and supporting Windows Server environments
• Strong hands‑on experience with VMware and physical and virtual server deployment
• Experience with Linux operating systems, ideally including Red Hat Enterprise Linux (RHEL)
• Experience supporting application hosting and associated infrastructure
• Strong understanding of Active Directory, Group Policy, DNS and DHCP
• Experience with high availability, clustering and infrastructure resilience
• Experience with enterprise server hardware, including Dell, HPE or equivalent
• Knowledge of SAN, NAS and enterprise storage technologies
• Experience with backup and disaster recovery technologies
• Good understanding of networking fundamentals including TCP/IP, VLANs, firewalls and segmentation
• Experience hardening, patching and managing the lifecycle of Windows and Linux systems
• Experience supporting system integration, testing, validation and commissioning activities
• Experience producing accurate technical designs, diagrams, infrastructure documentation and test procedures
• Strong technical troubleshooting and problem-solving skills
• Confidence working directly with clients, vendors and technical stakeholders
• Ability to work effectively within structured, fast‑paced project delivery environments
• Experience within OT / ICS, industrial, energy, utilities or Critical National Infrastructure environments
• Understanding of OT cyber security principles and recognised industry standards such as IEC 62443 or NCSC CAF

Benefits

At Sword, our core values and culture are based on caring about our people, investing in training and career development, and building inclusive teams where we are all encouraged to contribute to achieve success. We offer comprehensive benefits designed to support your professional development and enhance your overall quality of life. In addition to a Competitive Salary, here's what you can expect as part of our benefits package:

• Personalised Career Development: We create a development plan customised to your goals and aspirations, with a range of learning and development opportunities within a culture that encourages growth.
• Flexible working: Flexible work arrangements to support your work-life balance. We can't promise to always be able to meet every request, however, are keen to discuss your individual preferences to make it work where we can.
• A Fantastic Benefits Package: This includes generous annual leave allowance, enhanced family friendly benefits, pension scheme, access to private health, well-being, and insurance schemes.

At Sword we are dedicated to fostering a diverse and inclusive workplace and are proud to be an equal opportunities employer, ensuring that all applicants receive fair and equal consideration for employment, regardless of whether they meet every requirement. If you don't tick all the boxes but feel you have some of the relevant skills and experience we're looking for, please do consider applying and highlight your transferable skills and experience. We embrace diversity in all its forms, valuing individuals regardless of age, disability, gender identity or reassignment, marital or civil partner status, pregnancy or maternity status, race, colour, nationality, ethnic or national origin, religion or belief, sex, or sexual orientation. Your perspective and potential are important to us.

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