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Senior IT Security & Network Engineer / Architect 12-Month Contract | Dublin
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- €600–€700 a month
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Deloitte —Dublin, County Dublin
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Tether Operations Limited —Dublin, County Dublin
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6d
Cloud Security Analyst Cork, Ireland Dublin, Ireland Jul. 14, 2026
Alter Domus —Dublin, County Dublin
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Data Architect, Charles River Development, Vice President
State Street —Dublin, County Dublin
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EUC Architect
Tata Consultancy Services —Dublin, County Dublin
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Cisco Systems —Galway, County Galway
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Senior Solutions Architect
Asana —Dublin, County Dublin
- €155,000–€175,000 a year
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Lead Security Architect - Flutter Functions
Flutter Entertainment —Dublin, County Dublin
- Full-time
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Amazon Development Centre Ireland Limited —Dublin, County Dublin
- Full-time
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Enterprise Metadata Architect
American International Group, Inc. —DUBLIN 1, County Dublin
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Principal Cybersecurity Architect
JPMorganChase —DUBLIN 2, County Dublin
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IAM IGA UI Developer, Officer
State Street —Dublin, County Dublin
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PFH Technology Group —Remote
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Quick apply
Software Engineer - Frontend/Full Stack
Sony Interactive Entertainment —Dublin, County Dublin
- €69,500–€104,300 a year
- Hybrid work
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Senior IT Security & Network Engineer / Architect 12-Month Contract | Dublin

Hadfield Green
DUBLIN 2, County Dublin

Apply Now

Job details

Fixed term

Qualifications

Ansible
Load balancing
LAN
Firewall
Network protocols
REST
WAN
Network architecture
TCP/IP
Communication skills
Python
VPN

Full job description

Hadfield Green are partnering on a fantastic opportunity for a Senior IT Security & Network Engineer / Architect to join a critical cyber security and network services environment on a 12-month contract.

This is a senior technical role for someone who can bridge Cyber Security, Network Operations, and Architecture, leading security-driven network initiatives from design through to delivery.

You’ll act as a key technical lead across complex network and security projects, helping shape resilient, scalable, and secure infrastructure that supports business continuity and operational excellence.

The role

Lead cyber security projects delivering network-related security initiatives across a critical 24×7 operations network.
Design and implement best-practice network architectures focused on scalability, resilience, and security.
Take ownership of enterprise datacentre network design, including ACI fabric, tenants, VRFs, bridge domains, and EPGs.
Configure and manage Cisco NGFW features including IPS, Security Intelligence, Portscan Detection, and Encrypted Visibility Engine.
Manage firewall lifecycle activity including upgrades, policy optimisation, and health monitoring.
Develop secure segmentation strategies aligned to Zero Trust principles.
Use automation tools such as Python, Ansible, and REST APIs.
Design and optimise application delivery using Citrix NetScaler, including load balancing, WAF, content switching, and traffic steering.
Support high-availability and disaster-recovery planning for critical services.
Collaborate with application and infrastructure teams to ensure performance, resilience, and secure traffic flows.
Provide third-line technical support and mentor second-line staff.
Monitor performance and support continuous improvement across key network services.

What we’re looking for

CCIE qualification essential
CISSP qualification advantageous
Strong knowledge of networking protocols and topologies
Experience in security architecture design and implementation
Excellent understanding of TCP/IP, Cisco firewalls, ACI networks, LAN, WAN, and VPN systems
Familiarity with Identity & Access Management (I&AM) and cyber security
Knowledge of threat management and vulnerability assessment
Good working knowledge of ITIL, change management, and continual improvement
Strong communication and documentation skills

What’s on offer

12-month contract
Senior-level technical ownership
A high-impact security and network architecture remit
The chance to work on critical infrastructure with real scale and visibility

If you’re a senior security and network professional looking for your next contract move, this is a standout opportunity.

Interested? Get in touch with Hadfield Green to find out more.

Apply Now

Refine Your Search

network architect jobs

Senior IT Security & Network Engineer / Architect 12-Month Contract | Dublin

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Architect

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Cyber Security Architect

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