Senior Network Infrastructure Engineer (Cloud & Security)

Senior Network Infrastructure Engineer (Cloud & Security)

eir business is seeking a Senior Network Infrastructure Engineer - Cloud & Security) to join a team of network and security infrastructure professionals delivering managed network services to a large Irish enterprise client. The Senior Network & Security Infrastructure Engineer will be responsible for the design, implementation, operation, and ongoing support of enterprise networking and security infrastructure within a hybrid environment, including Azure, with a strong focus on Check Point and Cisco technologies.

The role supports business-critical services, ensuring high availability, security compliance, and operational excellence. You will act as an SME, engaging with engineers, management, and customer stakeholders to define solution approaches, agree maintenance objectives, introduce new capabilities, initiate technical improvements, and drive issue resolution.

This is a hands-on network and security infrastructure engineering role focused on solution design, project delivery and the management and operation of critical infrastructure to a high standard. Strong troubleshooting skills are essential. 

eir Business is the B2B division of eir and one of Ireland's leading providers of telecommunications, technology, cloud, cybersecurity, managed IT and workplace solutions. Supporting organisations of all sizes, from SMEs to large enterprises and public sector bodies, eir Business delivers secure, end-to-end connectivity and digital transformation services that help customers operate more efficiently, securely and effectively. Leveraging Ireland's largest mobile network, extensive fixed-line infrastructure, cloud capabilities and 24/7 expert support, eir Business partners with customers to design, implement and manage technology solutions that enable innovation, productivity and business growth.

Key Responsibilities:

·       Act as a senior technical escalation point for complex network and security incidents, conducting monitoring, troubleshooting, root cause analysis, continuously improve cloud network and security services resilience and cyber maturity.

·       Provide technical leadership for network and security infrastructure projects, ensuring solutions are delivered in line with operational and architectural standards.

·       Design, implement and support secure network and security solutions on-premises and Azure.

·       Maintain and enhance security platform integrations and automation capabilities, including management of Check Point CloudGuard policies and configurations.

·       Support Cisco networking and security technologies, including routing and switching, BGP, IPSec VPNs, Firepower and ACI, providing proactive monitoring, troubleshooting, capacity planning and service improvement.

·       Support and maintain automation of network and security infrastructure deployments using Terraform and Infrastructure-as-Code (IaC) where appropriate.

·       Collaborate with infrastructure, cloud and security teams to deliver resilient and secure cloud solutions

·       Support security reviews, incident response activities and compliance requirements.

·       Perform planned changes, upgrades, patching, and lifecycle management of network and security platforms. 

·       Manage infrastructure reliability, ensuring availability, performance, resilience, and compliance with agreed SLAs. 

·       Prepare and deliver customer-facing security reports, technical briefings covering firewall operations, threat activity, policy compliance, risk exposure, and remediation recommendations.

Experience:

·       Proven experience designing and operating networking and security in on-premise and Azure cloud infrastructure.

·       Strong understanding of Azure networking and security services, including ExpressRoute, VNets, NSGs, Azure Firewall, load balancing, network segmentation and integration with Check Point security solutions.

·       Exposure to or experience with Terraform and automation of network and security services would be advantageous.

·       Experience managing Check Point CloudGuard or similar cloud security platforms. Experience with API-driven integrations and automation would be beneficial.

·       Strong experience with Cisco networking and security technologies, including routing and switching, BGP, IPSec, packet capture and advanced network troubleshooting.

·       Experience supporting and managing Cisco physical and virtual routers, Firepower Management Centre (FMC) and Firepower Threat Defence (FTD) platforms.

·       Knowledge of Cisco ACI, including routing, switching and L3Out connectivity.

·       Experience with firewall management, monitoring, troubleshooting, capacity planning and performance optimisation across enterprise environments.

·       Expert-level troubleshooting and diagnostic skills across routing, switching, firewalling and hybrid network environments.

·       Strong operational experience in large-scale enterprise and multi-site environments, with proven expertise in solution design, deployment, delivery and ongoing operational management.

·       Excellent interpersonal skill including relationship development skills influencing, and communications skills with the ability to interact effectively with internal stakeholders at all levels within the business and external customer.

·       A track record of effectively assessing and managing competing priorities.