42 IT Systems Administrator
Hypersonica
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London, UK
Posted on May 6, 2026
Help Build Europe's Hypersonic Capability
At Hypersonica, we’re redefining what’s possible in European defence technology. We exist to deliver speed, resilience, and technological independence at a pace that sets a new standard. We are a small, elite team working on problems that matter, and solving them fast.
As our IT Systems Administrator you’re not stepping into a predefined role. You’re joining a talent dense environment where every individual shapes the direction of the company. Our philosophy is to hire a small number of exceptional people with broad, deep technical capability, strong judgement, and the ability to operate autonomously.
We hire for talent, not rigid boxes. This role represents a business need, but the way it evolves will be shaped by the individual. If you’ve achieved what others said was impossible, or you bring a unique combination of skills that doesn’t fit a traditional mould, we want to hear from you. The work you do here directly contributes to Europe’s technological independence.
What you'll do
- Own the Microsoft environment end to end: Entra ID, Windows endpoints, Intune/Autopilot (or GPO where needed), and core Microsoft server services.
- Stand up and run IT for the UK workshop from zero: secure network access, device provisioning, endpoint compliance, and reliable day to day operations.
- Build a hardened baseline for all laptops: MFA enforced, least privilege access, patching cadence, device encryption, and standard security policies.
- Be the on-site IT owner when something breaks: diagnose quickly, fix properly, document the outcome, and prevent repeat issues.
- Partner with the Germany IT team (Linux/Kubernetes/open source) to keep identity, access, and security controls consistent across UK and DE.
- Keep the system clean: documentation, asset tracking, simple workflows, and fast support with clear escalation when needed.
Who you are
- Hands-on IT systems administrator who has owned Microsoft environments in the real world (Entra ID, Windows endpoint management, Intune/GPO, and Microsoft server basics).
- Security-minded by default: you think in access control, hardening, audit-ability, and always thinking what could go wrong.
- High autonomy and good judgement. You can be the only person on-site and still deliver reliable outcomes.
- Practical operator, not a ticket-closer. You care about root cause, prevention, and keeping standards high.
- Comfortable in a fast moving hardware company where the priority is uptime, security, and speed, not perfect process.
- Curious enough to work alongside a Linux/Kubernetes team.
What we offer
- A mission driven environment with the opportunity to work on one of Europe’s most consequential defence challenges, with direct impact on sovereign capability and security.
- Daily collaboration with top experts across engineering, operations, and defence, with real opportunity to learn from the best, contribute, and grow.
- High ownership and autonomy; no time tracking, no micromanagement, just clear objectives and accountability for outcomes.
- A fast paced environment where good ideas are implemented quickly, and feedback from test and flight drives real decisions.
- A culture that values clarity, integrity, and excellence, and supports people who take initiative and push boundaries responsibly.
- Competitive compensation and real share options aligned to responsibility and impact, not tenure or hierarchy.
At Hypersonica, every hire raises the bar. We are deliberately small, intensely capable, and deeply mission-driven. If this role feels like a strong fit, or if you believe you bring something exceptional that goes beyond the description, we encourage you to apply.
Hypersonica is an equal-opportunity employer and assesses candidates solely on merit, capability, and potential.
You can apply directly to this role or reach out to Nathan Sweeney, Head of Talent. We review every application and aim to respond to all candidates within two weeks, whether the answer is yes or no.
This job is no longer accepting applications
See open jobs at Hypersonica.See open jobs similar to "42 IT Systems Administrator" General Catalyst.
