System Administrator / Senior System Administrator

About the role

We are looking for a System Administrator (with senior‑level responsibilities) to provide first‑level technical support to Brennan’s IT clients, engineers and internal staff. You will monitor cloud and infrastructure services, coordinate and escalate incidents, and continuously improve service delivery based on client feedback.

Key responsibilities

• Maintain and contribute to the knowledge management system for both client and internal teams.
• Monitor servers using LogicMonitor, N‑ABLE and perform basic Intune/SCCM configurations.
• Support O365, Mimecast, Intune and Azure integrations.
• Manage security settings in Microsoft ATP and endpoint security solutions such as Sophos, SentinelOne and CrowdStrike.
• Investigate security breach alerts and perform initial triage.
• Handle vendor management for hardware and software (HP, Dell, Microsoft, VMware, Citrix, etc.).
• Administer storage solutions (NAS, SAN, Data Domain, IBM, NetApp, Hitachi, Fujitsu, HP 3PAR).
• Administer Windows Server, groups, Group Policies, DNS and DHCP.
• Oversee backup and replication technologies (Veeam, Symantec, Zetro, Commvault) and manage on‑prem backup alerts.
• Execute maintenance tasks, application upgrades and patch escalations.
• Monitor, investigate and escalate issues according to the escalation matrix.
• Manage technical escalations from clients, end‑users or internal teams.
• Migrate virtual machines from on‑premises to cloud environments.
• Perform basic SQL maintenance planning, backups and certificate management.

Required profile

• Proven experience in system administration and infrastructure support.
• Strong investigative skills for security and incident handling.
• Ability to work under defined escalation timelines and collaborate with multiple stakeholders.

Required skills

• LogicMonitor
• N‑ABLE
• Microsoft Intune
• SCCM
• Office 365
• Mimecast
• Azure
• Microsoft ATP
• Sophos
• SentinelOne
• CrowdStrike
• HP, Dell, Microsoft, VMware, Citrix
• NAS / SAN storage (Data Domain, IBM, NetApp, Hitachi, Fujitsu, HP 3PAR)
• Windows Server, Group Policy, DNS, DHCP
• Veeam, Symantec, Zetro, Commvault backup solutions
• SQL (basic)
• Certificate management

What we offer

• Competitive remuneration
• Training and certification bonuses
• Culture Awards recognizing excellence
• All‑expenses‑paid trip for top performers (Brennan Daredevils)
• Vibrant social activities
• Discounted hardware and software
• Learning‑focused environment