Senior Systems Administrator

Administer Microsoft Azure Cloud infrastructure and identity services, including virtual machines, networking, storage, Azure AD/Microsoft Entra ID, VPN, RBAC, MFA, conditional access, monitoring, and security controls.

Administer Windows Server and Windows endpoint environments, including on-premises Active Directory, Group Policy, DNS, DHCP, domain services, account administration, access permissions, and troubleshooting.

Support switching, routing, VLANs, DNS, DHCP, VPN access, firewall rules, network segmentation, connectivity troubleshooting, and vendor or facilities coordination.

Manage Microsoft Intune device enrolment, MDM and MAM policies, compliance settings, application deployment, and troubleshooting.

Manage PKI and SSL/TLS certificate lifecycle activities, including requests, issuance, renewal, revocation, inventory, expiry monitoring, and troubleshooting.

Manage Azure and on-premises virtual machines through provisioning, patching, backups, migrations, monitoring, and disaster recovery activities.

Support Linux systems across on-premises and cloud environments.

Support rack management, hardware provisioning, asset coordination, cabling, capacity planning, and resilience activities in colocation environments.

Help design, maintain, and support hybrid cloud environments connecting cloud, on-premises, and colocation systems.

Support endpoint protection, vulnerability remediation, security incident response, access controls, and compliance activities.

Provide day-to-day end-user and service desk support for desktops, laptops, mobile devices, software installations, access issues, and general troubleshooting.

Maintain technical documentation, prepare reports, mentor junior administrators, and contribute to IT planning and continuous improvement.

Requirements 5-10+ years experience administering Microsoft Azure Cloud infrastructure, Azure AD/Microsoft Entra ID, on-premises Active Directory, Microsoft Intune, Windows Server, and Windows endpoints in an enterprise environment.

Working knowledge of virtualization, cloud infrastructure, Linux systems, backups, monitoring, disaster recovery, and core networking concepts, including routing, switching, VLANs, firewall rules, VPN connectivity, DNS, DHCP, and troubleshooting.

Practical experience with Windows administration and directory services, including Windows Server, Group Policy, DNS, DHCP, domain controller health, user and group management, permissions, and hybrid identity troubleshooting.

Experience supporting endpoint protection, access controls, MFA, vulnerability remediation, and incident response processes.

Practical experience with PKI and SSL/TLS certificate management, including certificate authorities, certificate signing requests, renewals, revocation, trust chains, certificate stores, and expiry monitoring.

Ability to troubleshoot complex issues across cloud, network, server, and endpoint environments while communicating clearly with technical and non-technical users.

Experience creating and maintaining technical documentation, standard operating procedures, and operational reports.

Ability to mentor junior team members, share knowledge, and contribute to continuous improvement across IT operations.

Exceptional candidates may also bring experience with colocation operations, Azure automation, infrastructure automation, PKI governance, SSL certificate lifecycle tooling, Windows Server hardening, Active Directory health and recovery, Azure AD/Microsoft Entra ID governance, network segmentation, firewall and VPN administration, secure network architecture, security compliance frameworks, identity governance, and hybrid cloud architecture.

Core Competencies Demonstrates expertise in administering Microsoft Azure Cloud infrastructure, Windows Server, and Active Directory, with a strong focus on security controls, compliance, and incident response. Proficient in managing hybrid cloud environments and mentoring junior team members while maintaining technical documentation and operational reports.

Highest-signal resume keywords Microsoft Azure Administration

Windows Server Management

Active Directory Administration

Endpoint Protection Support

PKI and SSL/TLS Certificate Management

ATS Optimization Keywords Hard Skills Microsoft Azure

Windows Server

Active Directory

Microsoft Intune

Linux Systems

Networking Concepts

Virtualization

Disaster Recovery

Endpoint Protection

PKI Management

Soft Skills Clear Communication

Mentoring

Continuous Improvement

Industry Keywords Cloud Infrastructure

Security Compliance

Identity Governance

Hybrid Cloud Architecture

Network Segmentation

Tools & Technologies Azure AD/Microsoft Entra ID

Group Policy

DNS

DHCP

VPN

Firewall Rules

Monitoring Tools

Technical Documentation Tools

Service Desk Software

Colocation Management

#J-18808-Ljbffr