shieldai - Shield AI - Staff Systems Administrator (R5995)

Remote - London3w ago

Remote Staff EMEA Cloud Computing Aerospace Systems Administrator Security Architect Linux AWS Azure Bash Python

Requirements

• 8 + years of experience in systems administration, infrastructure engineering, enterprise IT operations, or a closely related discipline. • Demonstrated success independently owning production IT infrastructure and end-user environments in a complex, regulated, segmented, or security-sensitive organization. • Strong hands-on expertise with Windows, macOS, and Linux; server administration and virtualization; Azure and/or AWS; and Active Directory and Entra ID or equivalent identity platforms. • Practical experience implementing system and endpoint hardening, configuration baselines, patch management, vulnerability remediation, encryption, endpoint detection and response, and least-privilege controls. • Experience supporting security or compliance programs and producing evidence for audits, assessments, or customer and regulatory requirements. • Strong networking knowledge, including TCP/IP, DNS, DHCP, VLANs, routing, VPNs, network segmentation, firewall policy, and secure remote access. • Experience with endpoint management platforms such as Intune, Jamf, or equivalent, including compliance policy and device lifecycle management. • Experience implementing and testing monitoring, backup, disaster recovery, and business-continuity capabilities. • Excellent documentation, prioritization, risk communication, and stakeholder-management skills, with the ability to drive outcomes under limited supervision. • Ability to support time-sensitive operational needs and participate in planned after-hours maintenance or incident response when required. • Experience supporting a firewalled, ring-fenced, subsidiary, joint-venture, sovereign, or otherwise separately governed entity environment. • Experience supporting engineering, R&D, aerospace, defense, manufacturing, or other mission-critical technical teams. • Working knowledge of recognized security and compliance frameworks such as CIS Controls and Benchmarks, NIST, ISO 27001, SOC 2, Cyber Essentials, or equivalent local and contractual standards. • Experience with security tooling such as SIEM, vulnerability-management platforms, privileged-access management, data-loss prevention, certificate management, or network-access control. • Experience supporting isolated, air-gapped, export-controlled, or data-residency-restricted systems. • Scripting and automation experience using PowerShell, Bash, Python, APIs, infrastructure as code, or configuration-management tooling. • Familiarity with GitHub, Azure DevOps, CI/CD environments, and secure engineering workflows. • Relevant certifications such as Microsoft, AWS, VMware, Cisco, CompTIA Security+, CISSP, CISM, GIAC, ITIL, or equivalent. • 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.

Responsibilities

• Infrastructure Ownership (On-Prem & Cloud) • Own and operate on-premises and cloud infrastructure, including physical and virtual servers, storage, backup platforms, identity services, core network services, and enterprise applications. • Administer Azure and/or AWS environments with responsibility for availability, capacity, performance, monitoring, secure configuration, backup, and disaster-recovery readiness. • Define technical roadmaps, identify operational risks, and independently drive modernization, standardization, scalability, and resilience improvements. • Maintain accurate architecture diagrams, inventories, operating procedures, recovery documentation, configuration records, and service ownership information. • Plan and execute infrastructure changes using disciplined change, testing, rollback, and post-implementation review practices. • Firewalled Entity and Segmented-Environment Support • Operate technology services for a dedicated legal or operating entity with explicit separation of systems, identities, data, administration, suppliers, and access from other corporate environments where required. • Implement and maintain approved trust boundaries, network segmentation, firewall policies, secure remote access, administrative tiers, and controlled cross-entity connectivity. • Ensure data, devices, accounts, cloud resources, and third-party access remain within authorized entity, contractual, regulatory, and data-residency boundaries. • Partner with Security, Legal, Compliance, Privacy, and corporate IT teams to translate entity-specific obligations into practical controls, operating procedures, and evidence. • Document and periodically validate boundary controls, data flows, privileged access paths, exceptions, and intercompany dependencies; escalate gaps and drive remediation to closure. • Support local business continuity and operational autonomy while aligning with approved global architecture, security standards, and governance. • Security, Compliance, and Systems • Establish, implement, and maintain secure configuration baselines for Windows, macOS, Linux, servers, network devices, cloud services, and endpoint-management platforms using recognized frameworks and vendor guidance. • Own patching and vulnerability-remediation workflows, including asset coverage, risk-based prioritization, remediation timelines, exception documentation, validation, and status reporting. • Administer and validate endpoint protections such as full-disk encryption, EDR/XDR, host firewall, secure boot, application controls, device compliance, removable-media controls, and least-privilege configurations. • Harden identity and administrative access through role-based access control, multifactor authentication, privileged-access separation, conditional access, service-account governance, and periodic access reviews. • Maintain logging, alerting, time synchronization, configuration monitoring, backup protection, and security telemetry needed for detection, investigation, and auditability. • Collect and maintain audit-ready evidence; support internal and external audits, control assessments, security reviews, customer requirements, and remediation plans. • Participate in incident response, containment, recovery, root-cause analysis, and corrective actions for infrastructure and endpoint security events. • Manage technical risks and policy exceptions transparently, including compensating controls, accountable owners, expiration dates, and closure plans. • Identity, Endpoint, and Service Delivery • Administer Active Directory and Entra ID or equivalent identity platforms, including user and group lifecycle, authentication, authorization, federation, and policy enforcement. • Manage Windows, macOS, and Linux endpoints through Intune, Jamf, or equivalent tooling, ensuring secure provisioning, configuration compliance, software deployment, inventory accuracy, and timely retirement. • Lead onboarding and offboarding activities, including device provisioning, access configuration, license assignment, asset recovery, and compliance validation. • Provide advanced troubleshooting and escalation support for employees, engineering systems, lab environments, collaboration services, and secure connectivity. • Own IT asset lifecycle, software licensing, vendor coordination, procurement support, warranty management, and secure equipment disposal. • Use scripting and automation to improve consistency, reduce manual effort, strengthen controls, and provide meaningful operational and compliance reporting. • Contribute reusable infrastructure patterns, standards, and documentation that can scale across comparable international entity environments.