Senior Network Security Engineer / Architect – 12 months Contract Role
Location: Dublin, Ireland (Hybrid – 3 days on-site, 2 days remote per week)
Contract: 12 months
Key Responsibilities
Lead Cyber Security projects delivering network-related security initiatives across a 24x7 operations network
Design and implement enterprise data centre networks using Cisco ACI fabric design
Configure and manage Cisco NGFW capabilities including IPS, Security Intelligence, Portscan Detection, and Encrypted Visibility Engine (EVE)
Design and optimise application delivery using Citrix Netscaler
Implement high availability and disaster recovery strategies
Perform firewall lifecycle management (upgrades, policy optimisation, health monitoring)
Develop secure network segmentation strategies aligned to zero-trust principles
Drive automation using Python, Ansible, and REST APIs
Provide third-level technical escalation support
Mentor second-line engineers and promote best practice engineering standards
Ensure network and security performance monitoring meets SLA requirements
Develop and test failover strategies for critical infrastructure components
Collaborate closely with application teams, operations, and external stakeholders
Required Skills & Qualifications
CISSP (Certified Information Systems Security Professional) – essential
Extensive experience in:
TCP/IP and enterprise network protocols/topologies
Threat management & vulnerability assessment
Identity & Access Management (I&AM)
Network management & administration tooling
Strong knowledge of ITIL (Change Management & Continuous Improvement)
Excellent communication, documentation, and stakeholder engagement skills
Live Role - Apply for immediate consideration
If you are interested in this role, please apply or contact honey@stelfox.comin strictest confidence
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