Senior OT Security Engineer

Edison Smart®; Dubai; On-site; AED 180,000 - 240,000; Full time

Job summary

Edison Smart is seeking a Senior OT Security Engineer to strengthen the security of live industrial environments in the UAE. The role focuses on deploying Nozomi Networks Guardian sensors and optimizing network segmentation across multiple sites.

You will work hands-on in plant settings, plan sensor placement, tune alerts and produce clear documentation while coordinating with IT and operations to ensure safe operational changes.

Qualifications

• 7+ years in OT/IC security with hands‑on delivery in live industrial environments.
• Proven Nozomi Networks deployment experience (Guardian and CMC).
• Strong knowledge of industrial networks, segmentation, firewalls, DMZ design.
• Experience with IEC 62443 and Purdue model.
• Familiarity with industrial protocols Modbus, DNP3, OPC, IEC 61850.
• Experience in GCC/UAE regulatory frameworks.
• Certifications such as GICSP, GRID, ISA/IEC 62443 or Nozomi Networks training.
• Based in UAE with immediate start.

Responsibilities

• Deploy and optimise Nozomi Guardian sensors across multiple sites.
• Plan sensor placement, traffic mirroring and data collection for asset visibility.
• Tune alerts, baselines and threat detection to reduce false positives.
• Design Purdue-aligned network architectures including OT firewalls and DMZs.
• Carry out IEC 62443-based risk assessments.
• Collaborate with operations, engineering and IT teams for safe security changes.
• Produce architecture diagrams and handover materials.
• Support incident investigation and response in OT environments.

Skills

OT/IC security

Nozomi Networks

Industrial networking

IEC 62443

Purdue model

Industrial protocols (Modbus, DNP3, OP

OPC/IEC 61850

OT security incident response

Firewall/DMZ design

GCC/UAE regulatory frameworks

Certifications (GICSP, GRID, ISA/IEC 6

Tools

Nozomi Guardian

Central Management Console (CMC)

Job description

Job title: Senior OT Security Engineer (Nozomi Networks)

Location: United Arab Emirates

Employment type: Contract

About the opportunity

Edison Smart is supporting a critical infrastructure client in the UAE on a long-term contract to expand OT visibility and security across their industrial sites. You’ll join a programme focused on deploying and optimising Nozomi Networks, strengthening network segmentation, and improving the security posture of live operational environments.

This is a hands-on engineering role for someone who has worked inside real plant environments and understands how to secure OT without disrupting operations.

Key responsibilities

• Deploy, configure and optimise Nozomi Networks Guardian sensors and the Central Management Console (CMC) across multiple industrial sites
• Plan sensor placement, traffic mirroring and data collection to achieve full asset visibility
• Tune alerting, baselines and threat detection to reduce false positives and improve operational value
• Design and implement Purdue-aligned network architectures, including OT firewalls, DMZs and segmentation between IT and OT
• Carry out IEC 62443-based risk assessments, including zone and conduit design and remediation planning
• Work closely with operations, engineering and IT teams to make sure security changes are safe for live environments
• Produce clear technical documentation, architecture diagrams and handover materials
• Support incident investigation and response within OT environments when needed
• 7+ years in OT / IC security, with hands-on delivery in live industrial environments
• Proven Nozomi Networks deployment experience (Guardian and CMC)
• Strong industrial networking knowledge, including segmentation, firewalls and DMZ design
• Practical experience applying IEC 62443 and the Purdue model
• Understanding of industrial protocols such as Modbus, DNP3, OPC and IEC 61850
• Background in oil and gas, utilities, manufacturing or other critical infrastructure
• Experience with other OT security platforms such as Claroty or Dragos
• Exposure to OT firewall vendors such as Fortinet, Palo Alto Networks or Cisco
• Experience in the GCC or with UAE regulatory frameworks
• Certifications such as GICSP, GRID, ISA/IEC 62443 or Nozomi Networks training
• UAE based
• Immediate start