Network Security Engineer

CCIE Network Security Engineer / Architect (Contract)

Location: Near Dublin (Hybrid – 3 days onsite per week)

Duration: Initial 12-month contract

Eligibility: No sponsorship available

Overview

An experienced CCIE-level Network Security Engineer / Architect is required to support the design and delivery of secure, scalable network infrastructure within a complex, 24/7 enterprise environment.

This role will act as the primary interface between Cyber Security and Network Operations, leading the delivery of network-focused security initiatives and architectural change. The successful candidate will provide third-level expertise, owning the design and implementation of secure network solutions from concept through to delivery.

Key Responsibilities

• Act as technical lead for network-focused cyber security initiatives within a critical operational environment
• Design and implement secure, scalable, and resilient network architectures aligned to industry best practice
• Lead the delivery of network and security solutions across full project lifecycles
• Develop network segmentation strategies aligned to zero-trust principles
• Design and implement enterprise data centre networks, including ACI fabric (tenants, VRFs, bridge domains, EPGs)
• Configure and manage next-generation firewall capabilities, including IPS, threat intelligence, and encrypted traffic visibility
• Manage firewall lifecycle activities including upgrades, optimisation, and health monitoring
• Design and optimise application delivery solutions, including load balancing and traffic management
• Implement high availability and disaster recovery strategies for critical services
• Collaborate with application and infrastructure teams to ensure performance, resilience, and secure data flows
• Provide third-level support for complex network and security incidents
• Monitor network and security performance to meet service level requirements
• Maintain and enhance network services supporting internal and external business operations
• Develop and test failover and resilience strategies across critical network components
• Mentor and support junior team members
• Produce high-quality technical documentation and support governance processes

Skills & Experience

Essential

• CCIE certified (mandatory)
• Extensive experience in network engineering and security architecture within enterprise environments
• Strong expertise in:
• TCP/IP networking
• LAN, WAN, VPN technologies
• Cisco networking and firewall technologies
• Network protocols and topologies
• Proven experience designing and implementing secure network architectures
• Experience with data centre networking, including ACI
• Strong understanding of cybersecurity principles, including threat management and vulnerability assessment
• Experience working within structured IT service environments (e.g. ITIL)
• Excellent communication, documentation, and stakeholder engagement skills

Desirable

• Experience with Citrix NetScaler (application delivery, load balancing, WAF)
• Knowledge of Identity and Access Management (IAM)
• Experience with automation tools such as Python, Ansible, or REST APIs
• CISSP certification
• Experience working in highly regulated or critical infrastructure environments