Senior IT Operations Engineer — Hybrid, Lead Infra & Security

Hollybank Trustees Ltd; Dublin; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

GP Refund Scheme for employees

Defined Contribution Pension Scheme

Job summary

Dublin Port Company is seeking a Senior IT Operations Engineer in Dublin. You will own the availability, security and performance of the IT estate, directing MSPs and leading infrastructure projects end-to-end. The role balances run and change with operational leadership and hands-on delivery.

Reporting to the CTO, you will manage first-line support transitions, ensure security controls, disaster recovery and regulatory compliance while collaborating with business units and external partners.

Qualifications

• Level 8 degree (or equivalent) in IT, computing or engineering, or equivalent demonstrable professional experience.
• Seven or more years in IT infrastructure and operations, with at least three at senior level.
• Enterprise virtualization - VMware, Hyper‑V, Nutanix, Proxmox VE or equivalent - including clustered or multi‑site configurations.
• Microsoft 365 tenancy administration, Entra ID, Windows Active Directory and hybrid Exchange.
• Cloud platform delivery and administration (Azure or AWS).
• Enterprise networking: routing, switching, VLANs, firewalls and network segmentation.
• Practical cybersecurity delivery - SOC or MDR services, firewall management, segmentation, Zero Trust.
• Database administration and query skills (SQL, NoSQL, Oracle or equivalent).
• Backup, disaster recovery and 24×7×365 real‑time solution support.
• Managing outsourced service providers: SLA administration, escalation and performance management.
• Leading technical projects to time, cost and quality without formal line authority.
• ITIL‑aligned service management and ISO/IEC 27001 or 20000 (or equivalent) working practice.
• Strong written and verbal communication, with the ability to document and explain technical content clearly.
• Operational Technology exposure: CCTV, VTS, automated mooring, machine networks, sensor and telemetry monitoring.
• OT and critical infrastructure security frameworks - IEC 62443, NIS2, DORA or equivalent.
• Data analysis and visualisation (SQL, Power Query, Power BI or equivalent).
• Storage and SAN configuration.
• Automation and scripting (PowerShell, infrastructure as code, containerisation).

Responsibilities

• Infrastructure and Platform Operations: Own admin, monitoring, patching and capacity across servers, virtualization, storage, network and cloud platforms.
• Maintain backup, disaster recovery and business continuity arrangements with tested procedures.
• Administer Microsoft 365 tenancy, Entra ID, AD and hybrid Exchange.
• Lead infrastructure, cloud, security and application projects: requirements, design, build, test, handover.
• Produce technical documentation, runbooks and as‑built records for supportability.
• Apply change control to protect operational stability.
• Guide projects from development and test into production.
• Act as service owner for outsourced first‑line support and device provisioning; manage SLAs.
• Monitor service performance, incidents and trends; drive corrective actions with providers.
• Contribute to procurement, contract renewal and vendor negotiation.
• Implement security controls: identity, endpoints, firewalls and Zero Trust.
• Support NIS2, GDPR, ISO/IEC 27001/20000 practices.
• Identify IT/OT risks and elevate to CTO with proportional controls.
• Participate in incident response including out‑of‑hours threats.
• Provide third‑line support for business applications; tune databases; assist with data viz.
• Work with business to specify enhancements and reporting needs.
• Build relationships and translate tech to non‑tech colleagues.
• Lead projects to time/cost/quality without formal line authority.
• Follow ITIL aligned service management and security frameworks.

Skills

IT infrastructure management

Leadership

Project coordination

Communication skills

Education

Level 8 degree in IT/Computing/Engineering

Tools

VMware

Hyper‑V

Nutanix

Proxmox VE

Microsoft 365

Entra ID

Active Directory

Hybrid Exchange

Azure

AWS

Networking (firewalls, VLANs)

ITIL ISO standards

SQL/NoSQL/Oracle

Job description

Dublin Port Company is seeking a Senior IT Operations Engineer in Dublin. You will own the availability, security and performance of the IT estate, directing MSPs and leading infrastructure projects end-to-end. The role balances run and change with operational leadership and hands-on delivery.

Reporting to the CTO, you will manage first-line support transitions, ensure security controls, disaster recovery and regulatory compliance while collaborating with business units and external partners.