OT Architect - DV Cleared
Rate: £700 - £850 a day
Location: Preston, Lancashire
Duration: 12 months +
Clearance: UKSV Developed Vetting (DV)
Work Pattern: On-site/Preston
The Opportunity
We are working exclusively with a globally recognised prime defence contractor to identify experienced OT Architects for a critical, long-running programme based in Preston. This is a technically demanding role embedded within a complex, highly secure programme environment supporting some of the UK's most sensitive national infrastructure.
You will operate at the intersection of Operational Technology, cybersecurity architecture, and systems engineering - shaping the OT landscape across a multi-platform, safety‑critical programme. The work is genuinely consequential and the technical challenge significant.
What You'll Be Doing
* Designing and owning end‑to‑end OT architecture across complex, multi‑domain systems
* Developing reference architectures, patterns, and standards aligned to programme requirements
* Leading OT/IT boundary definition and network segmentation design (Purdue model/IEC 62443)
* Providing architectural assurance and technical governance across the programme
* Engaging with cross‑functional engineering, security, and programme leadership teams
* Driving OT cyber security strategy and NCSC‑aligned secure‑by‑design principles
* Supporting DRACAS, configuration management, and architecture change control processes
* Interfacing with MOD stakeholders and contributing to technical reviews and audits
What We're Looking For
* Active, current Developed Vetting (DV) clearance
* Proven background in OT architecture within a defence, CNI, or regulated industrial environment
* Strong familiarity with IEC 62443, NIST SP 800-82, and/or equivalent OT security frameworks
* Experience with SCADA, ICs, PLC, or Embedded/Real‑Time systems architecture
* Solid understanding of OT/IT convergence, network segmentation, and secure system design
* Comfortable operating within formal systems engineering environments (eg MBSE, DODAF, NAF)
* Ability to communicate complex architectural concepts to both technical and non‑technical audiences
* Experience in safety‑critical or high‑integrity systems is highly desirable
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