OT Architect

The Role: OT Architect

Location: Sheffield, UK

Position Type: Contract Inside IR35

Remote work option Available: Remote

Job Description:

SKILLS/COMPETENCIES

• 10+ years’ experience working with Operational Technology in large, complex estates, preferably across corporate buildings, critical facilities or datacentres

• 5+ years’ experience designing, operating or security building OT systems such as BMS, HVAC. Electrical power systems, fire systems, lifts and SMART building platforms

• Demonstratable experience uplifting immature or legacy OT environments, moving from minimal technical controls to defined security, architecture and governance standards

• Strong practical experience applying IEC62443 in real-world OT and building technology environments with the ability to tailor controls to differing site risk profiles and operational constraints

• Familiarity with building automation and OT vendors such as Siemens, Schneider Electric, Honeywell, Johnsons Controls or equivalent

• Understanding of relevant regulatory and resilience frameworks (e.g. NIS2, DORA) and their impact on OT design and operations.

• Familiarity with standards such as ISO 27001, NIST CSF, IEC 62443

ESSENTIAL

• Demonstrable OT subject matter knowledge, including IEC 62443 concepts and practical application.

• Experience with Cyber-Physical Solution deployments, configuration, risk management and reporting

• Experience developing or applying structured methodologies (e.g., assessment, scoring, or attribution approaches).

• Understanding of Purdue-aligned network segmentation and reference architecture concepts.

• Ability to review remediation evidence and produce clear written validation outcomes and recommendations.

• Strong stakeholder management and communication skills across technical and non-technical teams.

• Strong documentation discipline: clear writing, traceable decisions, and consistent artefacts.

• Comfortable working in sprint-based/agile delivery and managing multiple priorities.

• Self-starter with a passion for change and transformation confident

DESIREABLE

• Desirable certifications: CISSP, CISM, GICSP (Global Industrial Cybersecurity Professional) or ISA/IEC 62443

• Experience supporting development of an OT Target Operating Model.

• Familiarity with OT asset discovery and vulnerability scanning approaches i

• Experience supporting third-party/vendor management within an OT environment.

• Experience contributing to an OT risk management framework and/or maturity uplift planning.