Staff Systems Administrator (R5995)

Shield AI
London
Workplace: OnsiteFull timeFunction: Administration & Executive AssistanceSkills: ["Documentation","Prioritization","Risk communication","Stakeholder management","Independent ownership"]

Own and operate enterprise on-prem and cloud infrastructure in a dedicated, security-sensitive entity environment. Administer Azure and/or AWS, deliver secure identity, networking, endpoint, and patching workflows, and maintain audit-ready evidence. Define roadmaps and drive modernization, segmentation, and resilience improvements, including backup, disaster recovery, and incident response support. Provide hands-on escalation and documentation to support engineering and business teams with minimal oversight.

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FursaFursa
Shield AI
Shield AI
13 hours ago

Staff Systems Administrator (R5995)

✓ Verified Job

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Source: Company careers pageValidated by: Fursa AI
Last checked: 5 hours agoStatus: Live

Job Summary

Own and operate enterprise on-prem and cloud infrastructure in a dedicated, security-sensitive entity environment. Administer Azure and/or AWS, deliver secure identity, networking, endpoint, and patching workflows, and maintain audit-ready evidence. Define roadmaps and drive modernization, segmentation, and resilience improvements, including backup, disaster recovery, and incident response support. Provide hands-on escalation and documentation to support engineering and business teams with minimal oversight.
Location: London
Workplace: Onsite
Employment Type: Full time
Job Function: Administration & Executive Assistance
Seniority: Mid level

Key Responsibilities

  • •Own and operate on-premises and cloud infrastructure, including servers, storage, backup platforms, identity services, network services, and enterprise applications.
  • •Administer Azure and/or AWS environments with responsibility for availability, capacity, performance, secure configuration, monitoring, backup, and disaster recovery readiness.
  • •Operate dedicated firewalled entity and segmented-environment support, implementing trust boundaries, network segmentation, firewall policies, and controlled cross-entity connectivity.
  • •Establish and maintain secure configuration baselines and end-user protections, including patching, vulnerability remediation workflows, encryption, EDR/XDR, secure boot, and least-privilege access.
  • •Maintain audit-ready evidence, participate in incident response and corrective actions, and provide advanced troubleshooting and escalation support.

Key Requirements

  • •12+ years of experience in systems administration, infrastructure engineering, enterprise IT operations, or a closely related discipline.
  • •Independent ownership of production IT infrastructure and end-user environments in a complex, regulated, segmented, or security-sensitive organization.
  • •Hands-on expertise with Windows, macOS, and Linux; server administration and virtualization; and Azure and/or AWS with identity platforms such as Active Directory and Entra ID.
  • •Experience implementing system and endpoint hardening, configuration baselines, patch management, vulnerability remediation, encryption, endpoint detection/response, and least-privilege controls.
  • •Strong networking knowledge including TCP/IP, DNS, DHCP, VLANs, routing, VPNs, network segmentation, firewall policy, and secure remote access.
Experience:DefenseAerospaceR&DMission-critical
Skills:DocumentationPrioritizationRisk communicationStakeholder managementIndependent ownership
Certifications:MicrosoftAWSVMwareCiscoCompTIA Security+CISSPCISMGIACITIL
Tech Stack:AzureAWSWindowsMacOSLinuxActive DirectoryEntra IDIntuneJamfPowerShellBashPythonAPIsInfrastructure as codeConfiguration-management toolingCIS ControlsNISTISO 27001SOC 2Cyber Essentials

Company Brief

Shield AI
Develops AI-powered autonomy and software for military aircraft and drones to enable autonomous ISR and combat missions, integrating perception, navigation, and mission planning for defense customers.
Industry: Defense Technology
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Funding: Series E+
Headquarters: San Diego, United States
Founded: 2015
WebsiteLinkedIn