Operational Technology (OT) Cyber Security Engineer

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!

As part of our continued growth in OT Cyber Security, applications are sought to fill a newly created OT Cyber Security Engineer role to join our Automation team. We are looking for a committed and enthusiastic OT Cyber Security Engineer to:

• Support OT cyber security project lifecycle activities to deliver secure by design Industrial Automation and Control Systems
• Assist in the delivery of OT cyber security consultancy services
• Contribute to the continuous improvement of Bilfinger UK's OT Cyber Security Management System (CSMS)

The ideal candidate will demonstrate a growth mindset, bring innovative and bleeding edge solutions to address complex challenges and have the ability to develop new ideas, processes and systems in an evolving OT cyber security landscape.

Working co-operatively with the OT Cyber Security Manager, Technical Managers, Project Managers and engineering teams across a variety of Automation projects you will:

• Support OT cyber security project lifecycle activities to deliver secure by design IACS:
  • Facilitate and conduct ISA-62443-3-2 based cyber security risk assessments to define risk based OT cyber security requirements
  • Create defence in depth, segmented system architectures
  • Develop secure by design IACS to meet client requirements including documenting OT cyber security requirements and specifications
  • Implement OT cyber security controls and countermeasures including:
    • Hardening of BIOS/UEFI, virtual environments and operating systems to recognised industry standards, guidelines and best practices
    • Network security including segmentation and boundary protection through managed switches, firewalls and remote access solutions e.g. Stratix, Fortinet, Hirschmann etc.
    • Cyber security applications for industrial control system environments:
      • Host Intrusion Detection (HIDS)
      • Malware detection and protection i.e. Endpoint Detection and Response (EDR)
      • Network Intrusion Detection (IDS)
      • Network monitoring
      • Security Information and Event Management (SIEM)
  • Support Project Managers with the planning and execution of OT cyber security aspects of projects to ensure they meet the time, cost and quality required by our clients
• Assist in the delivery of OT cyber security consultancy services by:
  • Conducting OT cyber security gap assessments of procedural and technological controls against relevant frameworks and standards e.g. National Cyber Security Centre (NCSC) Cyber Assessment Framework (CAF), ISA / IEC 62443 suite
  • Carrying out a wide variety of site and desktop based vulnerability assessments on client's brown field IACS
  • Support clients in the creation and development of their own CSMS artefacts including policies, procedures, guidelines, specification and work instructions etc.
• Contribute to the continuous improvement of Bilfinger UK's OT Cyber Security Management System:
  • Support further development of cyber security documentation including policies, procedures and specifications
  • Ensure policies, procedures and specifications are being followed on projects by providing OT cyber security technical supervision and quality assurance through project surveillance e.g. design review, informal audits etc.
  • Promote and maintain high level of security hygiene within Bilfinger UK Automation department
  • Promote and facilitate OT cyber security knowledge sharing and learning from experience through, for example, internal training, lunch and learns, standardisation, best practices etc.
  • Attend and represent Bilfinger UK at industry OT cyber security groups and events
  • Support Business Development team on opportunities including at client meetings, presentations/demonstrations, solutions optioneering etc.
  • Support Proposals team on technical solutions optioneering, bid production and technically…