Network Security Engineer

We are at the heart of Ireland’s energy transition - connecting, operating and transforming the electricity grid to support a low carbon, renewable future.

We are building talented teams that tackle real world challenges every day and help us to achieve our goal to prepare the grid to carry up to 80% of Ireland’s electricity from renewable sources.

We are proud to be a certified Great Place to Work, recognised for our culture built on trust, collaboration and inclusion. At EirGrid you will find supportive teams, opportunities to grow and meaningful work. We also offer secure employment with a range of flexible and family friendly working policies to support your life and wellbeing. If you want to know more about what EirGrid has to offer you, visit Life at EirGrid.

If you are ready to make an impact and grow your career in a purpose-led organisation, your journey starts here.

The Opportunity

The Network Security Engineer is an exciting role in a well-established Enterprise Security team. You will assist in the operation and development of IT security solutions across a variety of technical platforms, data networks and security domains. The solutions involved underpin the organisation’s corporate, market and power system operational functions.

Key operational aspects of the role include management of firewalls, content filtering services, WAF & other network security tools, responding to security incidents that have been escalated from a Tier 1 Security Operations Centre and supporting a variety of security operations management systems. Key development aspects include assisting with the extension or optimisation of existing network security solutions or the design and delivery of new solutions.

Key Responsibilities

• Design and implement secure network solutions that align with the organisation’s security policies and business goals.
• Recommend and evaluate new network security technologies and solutions.
• Configure and manage next gen firewalls, intrusion detection/prevention systems (IDS/IPS), network access control (NAC), and virtual private networks (VPN).
• Implement and maintain secure connectivity solutions for on-premises, cloud, and hybrid environments.
• Support and optimise a variety of security or network operational solutions that facilitate event data collection, systems monitoring, threat detection, vulnerability management, perimeter defences, enterprise password management and network infrastructure management such as email and web gateways.
• Create and maintain comprehensive documentation for network security designs, configurations, and procedures.
• Respond to security incidents that have been escalated from a Tier 1 Security Operations Centre by carrying out advanced analysis and remediation whilst overseeing the necessary engagement with internal stakeholders and external security partners
• Develop and maintain operational procedures and run books, driving improvements and automation where possible.
• Management of micro-segmentation solutions.
• Operation and management of WAF technologies.
• Assist the “Blue Team” in response to incidents and or attack simulations.

About You
The successful candidate will have:

• Qualification in a relevant technical discipline and typically 10 years’ experience in network security engineering or related roles.
• Expertise in designing and implementing secure network infrastructures.
• Hands-on experience with firewalls IDS/IPS, and VPNs.
• Strong knowledge of security protocols and technologies.
• Familiarity with cloud security (e.g., Azure Cloud).
• Experience with network security standards and frameworks (e.g., NIST CSF, CIS Controls).
• Proficiency in scripting and automation (e.g., Python, PowerShell) for network security tasks.
• Professional certifications such as CISSP, CCIE Security, or Azure Certified Security.
• Experience with Zero Trust architecture principles plus knowledge of security information and event management (SIEM) tools.
• Strong understanding of identity and access management (IAM) within a network context.
• An understanding of the cyber threat landscape including the analysis of multiple sources of intelligence and communication of results.
• Technical knowledge of IT Infrastructure ideally including security appliances, vulnerability management tools, directory services, host-based security technologies, data networks and protocols.
• Knowledge and experience in the implementation of resilient network security solutions.
• A security or networks industry certification and familiarity with cyber security frameworks (e.g. NIST) and standards (e.g. ISO 27001) would also be an advantage.

Closing date for applications
30/10/2026
Please note we receive a high volume of applications, and as every application is carefully reviewed our response time may vary. If you agree to be considered for other roles this may result in a delayed response as we establish the best fit for your experience. We appreciate your patience.

We value potential as much as experience**.** If you believe you can succeed in this role, we encourage you to apply, even if you don’t meet every requirement.

We're dedicated to diversity and inclusion at EirGrid. We recognise the strength that comes from having a diverse workforce and the importance of a supportive culture for all our people to achieve their potential. Our diversity and inclusion networks have been designed to create an inclusive culture that enables our people to feel a sense of belonging at work.

As an equal opportunities’ employer, we welcome applications from people of all backgrounds. Reasonable accommodations are offered at every stage of our recruitment process.