Senior Fortinet Network Security Engineer role delivering client-facing OT solutions for a major enterprise. 3 days onsite in Mascot.

Senior Fortinet SME role focused on OT and industrial environments

Client-facing consulting position with a major enterprise customer

Clear pathway to permanency with strong career development support

Network Security Engineer – Fortinet SME (OT / Industrial Environments) Location: Sydney (Mascot) Hybrid: 3 days onsite Contract: Initial 6 month contract with view to permanent Rate: Attractive day rate

About the role We are seeking a senior Network Security Engineer with strong Fortinet and OT (Operational Technology) experience to join a high-performing professional services team. You will design and deliver customer-facing network and security solutions for a major enterprise client, with a strong focus on OT and industrial environments.

This role is suited to a senior engineer who is confident in a consulting environment, enjoys working directly with clients, and can translate business requirements into secure, practical network solutions.

Key responsibilities

Deliver customer-facing network and security solutions across enterprise and OT environments

Act as a Fortinet subject matter expert across firewalls and security platforms, including policy, configuration, optimisation and upgrades

Engage directly with clients to understand business needs and translate them into technical designs and implementation plansSupport and enhance network and security services within OT environments such as industrial sites, critical infrastructure, manufacturing and utilities

Lead and contribute to project delivery including migrations, upgrades, hardening and network segmentation

Collaborate with senior engineers,



architects and business stakeholders to define and embed best practice for Fortinet and OT security

Produce clear documentation, design artefacts, runbooks and standards for both OT and IT network environments

About you

Strong hands‑on experience with Fortinet firewalls and security solutions such as FortiGate (FortiManager and FortiAnalyzer experience highly regarded)

Proven experience in a consultancy or professional services environment in a client‑facing role

Comfortable presenting to and working with both technical and non‑technical stakeholders

Experience designing, supporting or securing OT and industrial networks (for example SCADA, PLC, ICSEnvironments)

Solid understanding of core routing and switching concepts, with Cisco experience highly regarded

Background working in enterprise or critical infrastructure environments

Solid understanding of network security principles including segmentation, remote access, VPNs, IDS/IPS and hardening

Motivated to stay current with Fortinet and OT security best practices and pursue certifications such as Fortinet NSE and Cisco or security-focused certifications

About the company You will be joining a consultancy of around 130 people delivering major network and security projects and professional services engagements for blue‑chip clients. The business is founded and led by two highly respected veterans of the Australian network and security community, known for deep technical capability and a collaborative, supportive culture. What’s on offer

Senior role with a clear pathway to permanency

Opportunity to operate as a Fortinet SME in complex OT and enterprise environments

Direct exposure to industry leaders in the Australian network and security space

Support for training and certifications across Fortinet, Cisco and broader security

Work on modern, large-scale enterprise and OT environments with real‑world impact

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📌 Senior Network Engineer (Fortinet SME) (Haymarket)
🏢 Mode Talent
📍 Haymarket