OT Network Security Engineer

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 OT Network Security Engineer / Consultant, you will play a key role in the design, implementation and delivery of secure and resilient network infrastructure across complex OT and industrial environments.

You will work across industrial networking and network security, designing and implementing secure architectures that protect connectivity between IT, OT and safety-critical environments. This will include network segmentation, industrial DMZs, next-generation firewalls, secure remote access and resilient network infrastructure.

Working closely with clients and specialists across OT, infrastructure, engineering and cyber security, you will support solutions throughout the lifecycle – from initial design and configuration through integration, testing, commissioning and production go-live.

This is an opportunity to combine hands-on network engineering with technical consultancy, helping clients strengthen the security, resilience and performance of critical operational environments.

As an OT Network Security Engineer / Consultant, you will:

• Design and implement secure OT and industrial network architectures
• Configure and manage firewalls, switches, routers and secure remote access solutions
• Design and implement network segmentation across IT, OT and safety-critical environments
• Develop industrial DMZs, security zones and conduits
• Configure VLANs, routing, access controls and network security policies
• Support firewall policy design, rule reviews and optimisation
• Implement secure connectivity for OT applications, servers, engineering workstations and industrial systems
• Support network migrations, upgrades and infrastructure refresh programmes
• Undertake network testing, validation and performance analysis
• Support FAT, SAT, commissioning and production go-live activities
• Troubleshoot complex network, connectivity and firewall issues
• Support network hardening, vulnerability remediation and security improvement activities
• Produce HLDs, LLDs, network diagrams, firewall rule sets, test plans and as-built documentation