Industrial OT Network Engineer

As part of Bilfinger UK's Automation team, you will design, build and test industrial OT networks, NMS, and cyber security controls for ICS environments. You will ensure OT network security while maintaining availability, safety and compliance. You lead delivery of OT networking scopes across projects, coordinating with project teams and supporting commercial reporting. This role offers exposure to secure-by-design networking and cutting-edge OT cyber security initiatives.

• Deliver technical OT networking, NMS and cyber security controls across projects
• Design, implement and test secure ICS networks and systems
• Contribute to security risk assessments and secure-by-design topologies
• Produce architecture, topology, design, test specifications and maintenance documentation
• Lead deployment, testing and FAT for managed industrial networks and controls
• Support security lifecycle activities: vulnerability management, patching, password management
• Participate in site installation and commissioning activities
• Collaborate with Project Manager and engineers to plan OT networking scope
• Support Proposals team with OT network solutions for Automation bids
• Support strategic technology partnerships and ongoing innovation in OT networks
• Develop reusable design standards, templates and configuration approaches
• Contribute to the industrial OT network business strategy with Sales/BD and leadership
• Provide health and safety leadership and ensure QMS compliance

• Proven design, implementation and testing experience of OT networks and cyber security solutions in industrial settings
• Experience across full project lifecycle from specification to deployment and testing
• Experience with OT security controls including network segmentation, firewalls, NIDS; hands-on with Cisco, Rockwell Stratix, Siemens SCALANCE, Hirschmann portfolios
• Firewall design/implementation with Cisco Firepower, FortiGate, Hirschmann
• Network synchronization and time protocols; Layer 2/3 industrial networking; OSI/TCP/IP understanding
• Knowledge of industrial protocols: EtherNet/IP, CIP, Modbus TCP, DNP3, SNMP, MQTT; strong troubleshooting and documentation
• Experience with QMS-derived outputs and lifecycle traceability
• Desirable: OT cybersecurity certifications (ISA/IEC 62443, GIAC GISCP); CCNA/CCNP; experience in OT/ICS environments
• Relevant sector experience (Energy, Chemicals, Pharma, Oil & Gas, Water)
• Mentoring juniors and apprentices are a plus

• Strong stakeholder communication
• Proactive and collaborative teamwork
• Strong problem-solving and documentation skills
• OT network design and implementation
• Secure network engineering (segmentation, boundary protection, NIDS)
• Managed switches and firewalls (Cisco, Rockwell, Siemens, Hirschmann)