Senior IT Systems Administrator - Hybrid, Secure & Automate

Twinstream Limited; Gloucester; On-site; GBP 50,000 - 60,000; Full time

Benefits offered by this job

Annual bonus

Private healthcare

Pension 8%

Flexible working

Career progression

Job summary

TwinStream is seeking a Senior IT Systems Administrator to own and secure our corporate IT estate across cloud and on‑premise services. This hands‑on role offers autonomy to drive improvements, automate tasks and mentor colleagues.

You will manage Microsoft 365, Entra ID, networking and security, coordinate patches and backups, and support continuity planning with the IT Lead. DV clearance eligibility is required. Strong troubleshooting and incident response experience are essential.

Qualifications

• Strong Microsoft 365 administration and optimisation skills.
• Microsoft Entra ID, including SSO, CA, Identity Governance and Zero Trust.
• IT security, vulnerability management, patching, backups and DR.

Responsibilities

• Managing performance, resilience and lifecycle of cloud services, infrastructure, devices and apps.
• Administering Microsoft 365, Entra ID, identity and access management, endpoint security and SaaS apps.
• Maintaining corporate networks (firewalls, switches, wireless, VPN, DNS, DHCP).
• Implementing automation to improve efficiency and consistency.
• Monitoring service health, capacity, performance and security; addressing risks.
• Leading incident resolution and root-cause analysis.
• Coordinating patching, backups, recovery testing and BC arrangements.
• Maintaining documentation and ITSM standards.
• Mentoring colleagues and engaging with suppliers.

Skills

Microsoft 365 administration

Entra ID

Networking

Windows & Linux management

PowerShell scripting

Cloud services

IT security

Incident management

IT Service Management

Vendor & stakeholder liaison

Tools

Intune

Job description

TwinStream is seeking a Senior IT Systems Administrator to own and secure our corporate IT estate across cloud and on‑premise services. This hands‑on role offers autonomy to drive improvements, automate tasks and mentor colleagues.

You will manage Microsoft 365, Entra ID, networking and security, coordinate patches and backups, and support continuity planning with the IT Lead. DV clearance eligibility is required. Strong troubleshooting and incident response experience are essential.