Senior Systems Administrator (R5064)

Shield AILondon, EnglandHybridFull-timeSenior, 5–8 yearsListed 8 hours ago

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About this role

Job Description:
The Systems Administrator is responsible for supporting, securing, and optimizing enterprise IT operations. This includes end-user system support, infrastructure maintenance, IT asset lifecycle management, and leadership of junior team members. The ideal candidate brings strong technical expertise, organizational discipline, and a collaborative mindset to support a modern, scalable, and secure IT environment.

What you'll do:

- Provide hands-on desktop, server, and systems administration support for Windows and Linux environments.

- Install, configure, and troubleshoot hardware and software issues across end-user devices and server systems.

- Administer user accounts, access control, and group policies using Active Directory and Azure AD.

- Manage IT assets throughout their lifecycle: procurement, deployment, support, and decommissioning.

- Ensure proper inventory control, software licensing compliance, and asset tracking using IT asset management tools.

- Generate reports on hardware/software usage, compliance, and asset depreciation for internal and audit needs.

- Lead and mentor junior administrators and support staff; contribute to technical documentation and team training.

- Participate in on-call rotation and perform maintenance activities outside business hours as required.

- Collaborate with infrastructure, network, and security teams to support enterprise IT operations and incident response.

Required qualifications:

- 3+ years of experience in systems administration or enterprise desktop support roles.

- Strong proficiency in Windows and Linux operating systems.

- Experience with Active Directory, Azure AD, and identity/access management tools.

- Knowledge of networking fundamentals (TCP/IP, DNS, DHCP) and endpoint security practices.

- Familiarity with IT asset management platforms (e.g., SNIPE, JSM, JIRA).

- Ability to participate in an on-call rotation and off-hours maintenance windows.

- Strong documentation, troubleshooting, and customer service skills.

- Excellent communication and collaboration across technical and non-technical teams.

Preferred qualifications:

- 5+ years of IT experience, with at least 2 years in a senior or mentoring capacity.

- Experience with Microsoft Endpoint Manager (Intune), JAMF, and scripting in PowerShell.

- Working knowledge of ITIL practices related to change, incident, and asset management.

- Previous experience in asset lifecycle planning and procurement strategy.

- Experience supporting remote and hybrid work environments.

- Industry certifications (e.g., CompTIA, Microsoft, ITIL, Cisco) are a plus.

Why join Shield AI:

- Help build the defining defence technology company of this century.

- Work at the forefront of AI, autonomy, and next-generation defence systems.

- Operate in a highly entrepreneurial and mission-driven environment.

- Make a direct impact on international growth and strategic defence partnerships.

- Collaborate with exceptional teams solving some of the world’s most complex operational challenges.

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Our international teammates receive a comprehensive total rewards package aligned to your country office location. For full details on compensation and benefits, please consult your talent acquisition partner.