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Senior OT Cyber Security Engineer

Job in Chesterfield, Derbyshire, WS14, England, UK
Listing for: Bilfinger LTM
Full Time position
Listed on 2026-01-06
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
  • Engineering
    Cybersecurity, Systems Engineer
Job Description & How to Apply Below

Senior OT Cyber Security Engineer

Location:

Chesterfield

Bilfinger UK is a leading engineering and maintenance provider supporting customers across the chemical & petrochemical, nuclear, oil & gas, pharmaceuticals, biopharma, power & energy, utilities, renewables and food & beverage markets. We enhance the efficiency of assets, ensuring a high level of availability and reducing maintenance costs.

We have extensive experience in offshore and onshore facilities; specialising in asset management services throughout all life‑cycle phases from consulting, engineering, manufacturing, assembly, operations, maintenance and decommissioning.

This commitment is delivered by an experienced and highly competent workforce of over 4,500 employees operating from 14 offices in strategic industrial hubs, upholding the highest standards of safety, compliance and quality.

Role

As part of our continued growth in OT Cyber Security we are looking for an experienced, committed and enthusiastic OT Cyber Security Engineer to join our Automation team. The OT Cyber Security Engineer will :

  • Lead OT cyber security project lifecycle activities to deliver secure‑by‑design Industrial Automation and Control Systems (IACS)
  • Be responsible for delivering OT cyber security consultancy services
  • Manage continuous improvement of Bilfinger UK’s OT Cyber Security Management System (CSMS)

The OT Cyber Security Engineer will take full responsibility for the successful delivery of cyber security projects (technical quality, time and cost elements).

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.

Key Activities

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

  • Lead OT cyber security project lifecycle activities to deliver secure‑by‑design IACS:
    • Facilitate and conduct ISAbased 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, etc.)
    • Cyber security applications for industrial control system environments:
      • Host Intrusion Detection (HIDS)
      • Malware detection and protection (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 required time, cost and quality objectives
  • Responsible for delivering OT cyber security consultancy services by:
    • Conducting OT cyber security gap assessments of procedural and technological controls against relevant frameworks and standards (e.g. NCSC CAF, ISA/IEC 62443 suite)
    • Carrying out a wide variety of site and desktop‑based vulnerability assessments on clients’ brown‑field IACS
    • Supporting clients in the creation and development of their own CSMS artefacts (policies, procedures, guidelines, specifications, work instructions, etc.)
    • Managing continuous improvement of Bilfinger UK’s OT Cyber Security Management System
    • Supporting further development of cyber security documentation (policies, procedures, specifications)
    • Ensuring policies, procedures and specifications are followed on projects by providing OT cyber security technical supervision and quality assurance (e.g. design reviews, informal audits, etc.)
    • Promoting and maintaining a high level of security hygiene within Bilfinger UK’s Automation department
    • Promoting and facilitating OT cyber security knowledge sharing and…
Position Requirements
10+ Years work experience
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