IT Systems Engineer — Cloud, Identity & Security Ops

Infleqtion UK; Kidlington; Hybrid; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Bonus Program

Incentive Stock Option Plan

Private Healthcare Insurance

Pension contribution 10%

Cycle to work scheme

Tax efficient technology schemes

Life assurance (4 x salary)

Job summary

Infleqtion UK is seeking an IT Systems Engineer to run day‑to‑day corporate IT, manage cloud and on‑prem infrastructure, and act as escalation for complex incidents. The role covers identity, security controls, endpoints, backups and networking across Windows, macOS and Linux environments.

Based at Kidlington with up to 2 days remote, you will collaborate with Platform Engineering to improve resilience, monitoring and security posture while delivering IT projects and documenting procedures.

Qualifications

• 5+ years of relevant experience in systems administration, infrastructure engineering, or a similar technical role.
• Strong experience administering Microsoft 365, Entra ID and 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.

Responsibilities

• Administer Microsoft 365, Entra ID, 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

Skills

Microsoft 365 admin

Entra ID admin

Active Directory

Intune

Endpoint security

Networking

Azure

SIEM

Troubleshooting

Documentation

Education

Relevant degree

Technical qualification

Apprenticeship

Certifications beneficial

Tools

Microsoft 365

Entra ID

Active Directory

Intune

Azure

Job description

Infleqtion UK is seeking an IT Systems Engineer to run day‑to‑day corporate IT, manage cloud and on‑prem infrastructure, and act as escalation for complex incidents. The role covers identity, security controls, endpoints, backups and networking across Windows, macOS and Linux environments.

Based at Kidlington with up to 2 days remote, you will collaborate with Platform Engineering to improve resilience, monitoring and security posture while delivering IT projects and documenting procedures.