Industrial OT Network Engineer in Chesterfield

Bilfinger is a leading international industrial services provider, driving efficiency and sustainability for the process industry. With about 31,000 employees and over €5.4 billion in revenue in 2025, we offer solutions in consulting, engineering, manufacturing, maintenance, turnarounds, and digital applications across key sectors like energy, chemicals, pharma, and oil & gas.
Shape the future with Bilfinger UK: With a strong commitment to sustainability, Bilfinger UK stands out as a premier provider of engineering and maintenance services. For over 50 years, Bilfinger UK has consistently pushed the boundaries of innovation, delivering advanced solutions that support industries, infrastructure, and communities across the United Kingdom.
As a key member of the globally respected Bilfinger Group, Bilfinger UK has built a reputation as a versatile leader, offering both onshore and offshore services. From energy and utilities to pharmaceuticals and petrochemicals, the company’s broad expertise across various sectors makes it a trusted partner in the industry, as well as a work environment where you can develop your potential.
At Bilfinger, we offer a work environment where you can learn and grow. Join us and be part of a team shaping the future!

Role:

We are seeking an experienced, committed, and enthusiastic Industrial OT Networks Engineer to join our Automation team to design, develop, build and test industrial OT networks, network management systems (NMS) and cyber security controls for Industrial Control Systems (ICS) environments.

The role focuses on securing OT networks while ensuring system availability, safety, and compliance with industry and client standards.

The Industrial OT Network Engineer will take full responsibility for the delivery of industrial OT networking scopes across a variety of projects, meeting technical and quality requirements within agreed timescales and costs.

The candidate must be proactive in delivering their own tasks and coordinating with project team members, including supervising, assisting and monitoring task progress. They will also support the Project Manager on the commercial aspects of delivery by reporting progress, risks, issues and opportunities.

The Engineer should work co-operatively with the Project Manager, Lead Engineers and engineering team to ensure smooth project progress in accordance with the agreed project lifecycle.

Key Responsibilities:

Working closely and collaboratively with the Project Manager, Lead Engineers and project engineering team, OT Cyber Security Manager and Technical Managers you will:

• Be responsible for technical delivery of OT networks and NMS and cyber security controls for projects.
• Design, implement and test secure systems and networks for industrial control systems.
• Work closely with Automation and OT Cyber Security teams to take part in security risk assessments and develop secure by design network architectures and topologies.
• Produce clear technical documentation including architecture and topology diagrams, design specifications, test specifications & procedures and operating & maintenance documentation.
• Lead the configuration, deployment and testing of managed industrial networks and cyber security controls for OT environments.
• Conduct system integration and factory acceptance testing (FAT), both internal and customer facing.
• Support project security lifecycle management activities including vulnerability identification, patching, software and password management.
• Undertake site installation and commissioning activities.
• Support the planning and execution of the OT networking scope in collaboration with the Project Manager, Lead Engineers and project engineering teams. Report progress and blockers clearly to help projects meet agreed timescales and quality requirements.
• Support the Proposals team by developing industrial OT network solutions for Automation proposals.
• Support the OT Cyber Security Manager with the ongoing development of strategic technology partnerships.
• Improve the delivery of industrial OT networks through new technical initiatives, including reusable design standards, templates and configuration approaches. Drive innovation and standardisation across the department.
• Support the development of the industrial OT network business strategy in collaboration with the Sales and Business Development teams, the Head of Automation & Cyber Security and the OT Cyber Security Manager.
• Provide health and safety leadership by example.
• Ensure compliance with Bilfinger’s Business Management System
• Proven experience of design, implementation and testing of OT networks and cyber security solutions within industrial environments.
• Detailed experience of the full project life cycle from system specification through design, development, testing.
• Experience of the design, specification, implementation, testing and commissioning of security solutions, controls and countermeasures for OT environments. This should include:
• Network security – Secure deployment and hardening of network infrastructure including segmentation and boundary protection through managed switches and firewalls, and passive Network Intrusion Detection Systems (NIDS).
• Hands on experience of:
• Network design and implementation of industrial networks using managed switches, with skills transferable across Rockwell Automation (Stratix), Cisco, Siemens SCALANCE and Hirschmann product portfolios.
• Firewall design and implementation using Cisco Firepower, FortiGate and Hirschmann (e.g. EAGLE) technology.
• Network synchronisation, including dedicated time appliances and NTP.
• Practical knowledge of Layer 2 and Layer 3 industrial networking, including switching, routing, VLANs, network segmentation and resilient network architectures.
• Understanding of the OSI and TCP/IP models and their practical application. Strong applied knowledge of industrial network protocols is required.
• Experience with EtherNet/IP, CIP, Modbus TCP, DNP3, SNMP and MQTT is beneficial.
• Strong troubleshooting, documentation, and stakeholder communication skills.
• Experience of working within a Quality Management System (QMS), delivering well described outputs with traceability through project lifecycle
• Experience in Industrial Control System integrator organisation/environment
• Experience in one or more of the markets in which Bilfinger operates – Energy, Chemicals & Petrochemicals, Pharma & Biopharma, Oil & Gas, Water
• Experience implementing or supporting cyber security applications in industrial control system environments, including:
• Security visibility including Network Intrusion Detection (IDS).
• Technical knowledge of a variety of control system Original Equipment Manufacturers (OEMs) e.g. AVEVA, Rockwell Automation etc.
• Experience working in or for System Integrator, Operators of Essential Services (OES), Critical National Infrastructure (CNI) or OEM organisations.
• Familiarity with cyber security standards and frameworks relevant to OT, including how they inform network design and the selection and implementation of security controls.
• Experience mentoring junior staff members including apprentices.

Qualifications:

• A degree or HND/HNC in Electronic/Electrical Engineering, Computer Science or other relevant engineering discipline
• Professionally registered engineer or working towards professional registration.
• Relevant OT cyber security certification e.g.:
• ISA/IEC 62443 Cyber Security Expert
• Global Information Assurance Certification (GIAC) Global Industrial Cyber Security Professional Certification (GISCP)

For additional information please contact Leo Andrew Carvel Taylor by email leo.taylor@bilfinger.com.
Bilfinger is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to ethnicity, color, religion, sex, sexual orientation, gender identity, national origin, disability or other characteristics protected by law.