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
Work alongside OT, cyber security, infrastructure, application and engineering specialists
Provide technical consultancy and guidance to clients on OT network security and resilience
Requirements
You’ll bring strong hands-on network engineering experience, with the technical capability to design, secure and support networks within complex environments.
Strong hands-on experience with enterprise and/or industrial networking
Strong knowledge of TCP/IP, VLANs, routing, switching, DNS and network services
Experience configuring and managing next-generation firewalls
Experience with platforms such as Palo Alto Networks, Fortinet, Cisco or Check Point
Strong understanding of firewall policies, NAT, VPNs, IPS/IDS and application-based security controls
Experience designing and implementing network segmentation and DMZ architectures
Experience with Cisco switching and routing technologies
Experience supporting secure remote access and privileged connectivity
Experience with network monitoring, packet analysis and troubleshooting tools
Experience with high availability, redundant networking and resilient network architectures
Experience with network device hardening and vulnerability remediation
Experience supporting network integration, testing, validation and acceptance activities
Experience producing technical network and security documentation
Strong technical troubleshooting and problem-solving skills
Confidence working directly with clients and technical…