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Senior security analyst

Dublin
HCS
Security analyst
Posted: 19h ago
Offer description

Location: Ireland (Various) – Dublin or Waterford | Position: Full Time | Hybrid: Yes
About the Role
HCS is currently seeking an experienced Senior Monitoring Analyst to join our Ireland-based 24×7 operations team, supporting our proactive monitoring and managed services offering.
This is a hands‑on, technical role focused on real‑time monitoring, alert triage, proactive remediation, and escalation across customer environments. You will play a key role in preventing service disruption by identifying issues early, resolving them quickly, and ensuring effective handover to resolver teams where required.
This role operates as part of a 24×7 rota and is based in Ireland, supporting customers around the clock and ensuring consistent service quality.
Key Responsibilities

Provide continuous monitoring of customer environments across servers, endpoints, network devices, Microsoft Azure and 365 services.
Triage alerts from monitoring and RMM platforms, distinguishing between events, incidents, and false positives.
Prioritise and respond to alerts in line with severity, impact, and SLA.
Ensure accurate ticket logging, categorisation, and documentation in the service management platform.
Perform first and second‑line investigation as well as remediation of monitoring alerts.
Resolve common issues such as:

Disk space and resource exhaustion
Service and agent failures


Escalate incidents to Infrastructure, Network, Security, or Service Desk teams with clear diagnostics and context.
Assisting the patching team with out-of-hours patching
Monitor and manage backup‑related alerts and tickets
Proven experience in a 24×7 NOC, monitoring, or IT operations role.
Strong understanding of ITIL practices, particularly Event Management and Incident Management.
Hands‑on experience with monitoring and RMM platforms (e.g. N‑able or similar).
Solid technical knowledge of:

Windows servers and endpoints
Core infrastructure concepts (CPU, memory, disk, services)
Microsoft 365 service health and availability


Experience with automated remediation or scripting in monitoring environments.
Exposure to security‑related alerts (AV/EDR health, failed logins, agent checks).
Background in an MSP or SLA‑driven managed services environment.
Experience managing Fortinet fabric.
ITIL Foundation certification or equivalent.
Relevant industry certifications (AZ104, VCP, NSE4 etc)

Key Attributes

Calm, methodical, and decisive under pressure.
Strong analytical and troubleshooting skills.
High attention to detail and strong sense of ownership.
Clear communicator, particularly during escalations and shift handovers.
Proactive mindset with a focus on service quality and continuous improvement.

HCS Benefits Package
At HCS, we value our employees and offer a comprehensive benefits package to support their well‑being and professional growth. Our benefits include:

HCS Pension Scheme - competitive retirement savings plans with company matching contributions.
Aviva Care - Access to Health & Wellness Support – Anytime, Anywhere
Paid Time Off: Generous paid time offset policies, including vacation, sick leave, and holidays.
Professional Development: Opportunities for continuous learning and development, including access to training programs and certifications.
Work-Life Balance: Flexible work arrangements to support a healthy work-life balance.
Death in Service – in the unlikely event of your death, a lump sum of 4 × your annual salary will be paid to your nominated beneficiary

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