OT SME/Expert

Gazelle Global Consulting Limited; Newcastle upon Tyne; Hybrid; GBP 92,000 - 166,000; Part time

Benefits offered by this job

Excellent Day Rate

Job summary

Gazelle Global Consulting Limited seeks an experienced OT Security SME to support a major UK power sector cybersecurity programme on a 12-month contract. Location: Shiremoor, hybrid 2-3 days on-site.

You will work with OT engineering, operations and cybersecurity teams on cryptographic protection, key management and secure communications across OT environments, including PKI integration, HSM implementation and CLM, with testing and deployment readiness.

Qualifications

• Strong OT/ICS understanding of SCADA/RTUs/IEDs/HMIs.
• Experience deploying HSM in control centres/substations.
• Knowledge of PKI, certificate management and cryptographic key management.
• Familiarity with DNP3, IEC 61850, Modbus, IEC 62351.
• Understanding of Purdue Model, OT segmentation, and DMZ design.
• Awareness of IEC 62443, NERC CIP and NCSC CAF.
• Experience supporting PoC testing and OT security integration.
• Understanding OT change control and maintenance windows.

Responsibilities

• Support a multi-phase programme including HSM, PKI and CLM.
• Assist deployment option assessments and testing.
• Ensure security solutions align with live OT environments.
• Collaborate with OT engineering, operations and cyber teams.

Skills

OT/ICS knowledge

HSM deployment

PKI architecture

Industrial protocols

OT network segmentation

IEC 62443 / NERC CAF

Proof-of-concept testing

OT change control

Job description

We're seeking an experienced OT Security SME to support a major cybersecurity programme within the UK power sector.

This 12-month contract offers the opportunity to work on critical infrastructure security, focusing on cryptographic protection, key management and secure communications across operational technology environments.

You'll contribute to a multi-phase programme covering Hardware Security Module (HSM) implementation, Public Key Infrastructure (PKI) integration and Certificate Lifecycle Management (CLM). Working alongside OT engineering, operations and cybersecurity teams, you'll help assess deployment options, support testing and ensure security solutions are suitable for live operational environments.

Key Skills and Experience:

• Strong understanding of OT/ICS environments, including SCADA, RTUs, IEDs and HMIs.
• Knowledge of HSM deployment within control centres and substations.
• Experience or understanding of PKI architecture, certificate management and cryptographic key management.
• Familiarity with industrial protocols such as DNP3, IEC 61850, Modbus and IEC 62351.
• Understanding of OT network segmentation, DMZ design and the Purdue Model.
• Awareness of IEC 62443, NERC CIP and NCSC CAF requirements.
• Experience supporting proof-of-concept testing, failover validation and OT security integration.
• Understanding of OT change control, maintenance windows and operational safety requirements.

Location: Shiremoor, UK | Hybrid, 2-3 days per week on-site.

Excellent Day Rate Available.