OT/ICS Security Specialist | Contract | Ipswich (Hybrid) | 3 months | Inside IR35

OT/ICS Security Specialist | Contract | Ipswich (Hybrid) | 3 months | Inside IR35

Duration: 3 months
Rate: £500/day (Inside IR35)
Location: Ipswich (2 days/week on-site)

I'm seeking a highly skilled OT/ICS Security Specialist to support a critical infrastructure client in strengthening their operational technology security posture. This is a hands-on contract role ideal for someone with deep technical expertise across industrial control systems, compliance frameworks, and Fortinet technologies.

Key Responsibilities

• Lead and support OT security operations across SCADA, DCS, EMS, and field environments
• Administer and engineer content for FortiSIEM, integrating with Fortinet ecosystem (FortiGate, Analyzer, Manager)
• Develop and maintain monitoring use cases for OT assets (IEDs, HMIs, historians)
• Detect and respond to OT security incidents with low-impact containment strategies
• Implement compensating controls for vulnerability and risk management in OT environments
• Automate tasks and enhance workflows using Python, APIs, and custom parsers
• Ensure compliance with NIS CAF or equivalent standards (IEC 62443, NERC CIP, ISO 27001, NIST)
• Communicate effectively with stakeholders, manage vendors, and uphold safety and change control processes

Technical Expertise

• ICS protocols and architectures: Purdue Model, IEC 61850, DNP3, Modbus, IEC 104
• Fortinet product suite and SIEM integration
• OT security tooling and architecture design

Certifications (Preferred)

• GICSP, IEC 62443, ISO Lead Auditor, CISSP, Fortinet NSE

Requirements

• Must be able to attend on-site in Ipswich 2 days per week
• Eligible to work Inside IR35
• Available for a 3-month engagement

If this is of interest then please apply with your most up to date CV and I'll give you a call if you look like a good fit.