Skills

Communication Incident Response Firewalls Vulnerability Assessment Architecture Network Architecture

Job Specifications

OT Cybersecurity Expert (Freelance, Fully Remote — Based in Paris)

Contract type: Freelance

Location: Paris, France (collaboration with Paris-based teams)

Work mode: Fully remote

Start date: ASAP

Duration: 6–12 months (renewable)

About the Role

We are recruiting an experienced OT Cybersecurity Expert for one of our top clients, a major player in the industrial and critical-infrastructure sector. You will support their global OT security initiatives, working closely with engineering, operations, and IT security teams.

Responsibilities

Assess OT environments and identify cybersecurity vulnerabilities
Develop and implement security controls aligned with IEC 62443 and NIST frameworks
Support segmentation, network hardening, and secure configuration baselines
Lead threat modeling, risk assessments, and incident response for OT systems
Advise teams on best practices for securing industrial control systems
Produce technical documentation and contribute to security strategy roadmaps
Coordinate with vendors and internal stakeholders (remote collaboration)

Required Skills & Experience

5+ years of experience in OT/ICS cybersecurity
Strong knowledge of:
PLCs, SCADA, DCS, IIoT, industrial protocols (Modbus, OPC-UA, Profibus, etc.)
Network architecture & segmentation (firewalls, VLANs, DMZ)
IEC 62443, NIST CSF, ISO 27000
Experience within energy, manufacturing, utilities, or transportation sectors
Hands-on experience with vulnerability assessment & security tools
Strong communication skills and ability to work remotely with cross-functional teams
Fluent in English and/or French

Nice-to-have

Certifications such as GICSP, GRID, ISA/IEC 62443, CISSP
Experience with SOC integration for OT
Knowledge of safety systems (SIS) and OT asset inventory tools

What We Offer

Collaboration with one of our top clients in a strategic, high-impact environment
Fully remote work with Paris-based stakeholders
Flexible schedule
Long-term freelance mission
Opportunity to secure and modernize critical infrastructure systems

About the Company

Recruitment is hard. And it's not your job. Otherwise you'd not be on this page. Enzo Tech is an on-demand service bringing IT professionals and companies together across Europe for everyone to reap the rewards. You don't want to hear the usual recruitment talk. Enzo Tech is direct, transparent and proactive. Our solution removes the hassle and focuses on results. In our first year trading the business turned over EUR2.500.000 (2021), our second year we experienced fantastic growth due to the close collaboration with cli... Know more