IT Systems Engineer

About The Company

Infleqtion is a global quantum technology company solving the world’s most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables “quantum everywhere” through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications.

Infleqtion has offices in the USA, United Kingdom and Australia. This is a full-time position based at our Kidlington, Oxford office. Work from home permitted up to 2 days per week based on business needs and manager approval.

The IT Systems Engineer is responsible for the day-to-day operation, administration and technical support of Infleqtion UK’s corporate IT environment.

The role provides technical escalation, supports the secure and reliable delivery of corporate IT services, and plays a key part in transitioning operational services from outsourced to internally managed delivery.

The role requires broad hands-on experience across cloud, on-premises systems, endpoints, identity, networking and core infrastructure services, with growing responsibility across infrastructure, security operations and service resilience as the UK IT function develops.

• Administer Microsoft 365, Entra , Active Directory, Intune and associated corporate IT services
• Manage identity, access and privileged-access administration
• Manage endpoint configuration, patching, application deployment and security controls across supported Windows, macOS and Linux environments
• Operate and maintain backup, monitoring and recovery platforms
• Support the resilience, availability and performance of corporate IT systems
• Act as the technical escalation point for complex incidents and service requests
• Support corporate networking, wireless, firewall and connectivity services in collaboration with Platform Engineering where responsibilities overlap
• Support the operation and ongoing development of UK infrastructure services in collaboration with Platform Engineering
• Support virtualised and on-premises infrastructure where it forms part of the corporate IT environment
• Support vulnerability remediation, endpoint security and technical cyber security controls
• Take an active role in security monitoring, vulnerability management and incident response
• Support the development of internal security operations capability as the UK IT function matures
• Contribute to the design and implementation of secure and resilient infrastructure services
• Maintain technical documentation, configuration records and operational procedures
• Deliver technical elements of onboarding, offboarding and user lifecycle management
• Support IT projects, infrastructure changes and technology deployments
• Identify opportunities to simplify, standardise and improve IT services in line with IT strategy and priorities
• Support the transition and ongoing operation of services and tooling currently delivered by managed service providers

• 5+ years of relevant experience in systems administration, infrastructure engineering, or a similar technical role
• Strong experience administering Microsoft 365, Entra  Active Directory environments
• Experience with Intune or comparable endpoint-management platforms
• Good knowledge of Windows, macOS and Linux corporate environments
• Strong understanding of identity, access control, RBAC and least-privilege principles
• Strong understanding of networking concepts including LAN, WAN, VLANs, VPNs, DNS, DHCP, wireless and firewalls
• Experience with virtualisation technologies such as Hyper‑V or VMware
• Experience with backup, recovery, monitoring and business-continuity technologies
• Experience with endpoint security, vulnerability remediation and patch‑management tooling
• Good understanding of cloud platforms, particularly Microsoft Azure
• Experience with security monitoring, vulnerability management or incident response
• Familiarity with SIEM, EDR/XDR or SOC tooling
• Strong troubleshooting, documentation and communication skills

• Relevant…