Senior Infrastructure & Network Engineer

Job Description

Microsoft Infrastructure & Identity Administration

• Administer, maintain, and support Microsoft infrastructure including Windows Server, Active Directory, Group Policy, DNS, DHCP, DFS, Microsoft Entra ID, Microsoft Entra Connect, Microsoft Intune, Microsoft 365, WSUS, Remote Desktop Services (RDS), and Hyper-V.
• Manage user and device identities, authentication, access controls, security groups, and permissions across Active Directory and Microsoft Entra ID.
• Administer Microsoft 365 services including Exchange Online, Microsoft Teams, SharePoint Online, and OneDrive.
• Support endpoint management, device compliance, application deployment, Windows patching, and asset administration through Microsoft Intune.
• Maintain security and operational configurations through Group Policy and endpoint management tools.

Network Administration

• Manage and support enterprise network infrastructure, including LAN, WAN, Wi-Fi, VLAN, TCP/IP, routing, switching, VPNs, firewalls, and network access controls.
• Configure, monitor, troubleshoot, and optimize network connectivity, availability, performance, and security.
• Maintain network documentation, IP addressing schemes, and configuration records.
• Work closely with telecommunications providers, security vendors, and service partners to resolve incidents and implement infrastructure enhancements.

Virtualization, Server & Storage Management

• Administer and support VMware ESXi, vCenter, Hyper-V, and hyperconverged infrastructure (HCI) environments.
• Manage Windows and Linux servers, including provisioning, patching, monitoring, performance tuning, and troubleshooting.
• Support enterprise storage systems, SAN environments, capacity planning, performance monitoring, and storage expansion activities.
• Monitor infrastructure resources and proactively address capacity and performance issues.

Backup, Recovery & Business Continuity

• Administer enterprise backup and recovery solutions, including backup monitoring, restoration, and recovery testing.
• Perform periodic recovery exercises to validate business continuity and disaster recovery readiness.
• Maintain backup policies, retention schedules, and recovery documentation.

Security, Patching & Vulnerability Management

• Perform infrastructure patching and maintain compliance across servers, endpoints, and network devices.
• Support vulnerability remediation activities arising from security assessments, penetration testing, and audits.
• Implement security hardening measures and maintain infrastructure security baselines.
• Review privileged access and ensure secure administration practices are followed.

Incident Management & Operations Support

• Monitor infrastructure health, availability, utilization, and performance.
• Troubleshoot and resolve Level 2/Level 3 incidents across Microsoft platforms, servers, virtualization, storage, and network environments.
• Conduct root cause analysis and implement preventive measures for recurring incidents.
• Manage vendor escalations and maintain operational documentation, including incident and change records.

Infrastructure Projects & Automation

• Participate in infrastructure implementation, migration, upgrade, modernization, and refresh projects.
• Develop and maintain automation scripts using PowerShell, Python, or similar technologies.
• Automate infrastructure administration, user provisioning, monitoring, patching, and reporting processes.
• Maintain architecture diagrams, network documentation, SOPs, configuration records, and asset inventories.
• Evaluate emerging technologies and recommend infrastructure improvements.

Requirements

Education & Experience

• Diploma or Degree in Information Technology, Computer Science, Computer Engineering, Information Systems, or a related discipline.
• Minimum 5 years of hands-on experience in Microsoft infrastructure, systems administration, and network operations.
• Strong experience supporting production environments and resolving complex infrastructure issues.
• Proven expertise in Windows Server and Active Directory administration.

Technical Skills:

Microsoft Infrastructure

Strong hands-on experience with:

• Windows Server Administration
• Active Directory & Group Policy
• DNS, DHCP, and Domain Services
• Microsoft Entra ID & Entra Connect
• Microsoft 365 Administration
• Microsoft Intune
• Exchange Online
• Microsoft Teams
• SharePoint Online & OneDrive
• WSUS & Windows Patch Management
• Hyper-V
• PowerShell Scripting

Networking

Good working knowledge of:

• TCP/IP, Subnetting, VLANs
• LAN/WAN Technologies
• Routing & Switching
• Firewall Administration
• VPN Technologies
• Wireless Network Infrastructure
• Network Monitoring & Troubleshooting

Experience with Cisco, Aruba, Fortinet, or equivalent enterprise networking platforms will be advantageous.

Virtualization, Storage & Backup

• Hands-on experience with VMware ESXi, vCenter, and/or Microsoft Hyper-V.
• Experience with enterprise storage and SAN environments.
• Familiarity with HCI and Software-Defined Data Centre (SDDC) technologies.
• Experience managing enterprise backup and disaster recovery solutions.
• Linux administration experience will be an added advantage.

Automation & Security

• Experience with PowerShell scripting is required Python or other automation tools are advantageous.
• Knowledge of vulnerability management, security hardening, and patch management processes.
• Understanding of infrastructure security, privileged access management, and endpoint protection concepts.

Professional Skills

• Strong troubleshooting and analytical problem-solving skills.
• Ability to independently investigate and resolve infrastructure issues.
• Experience managing vendor relationships and technical escalations.
• Strong documentation and technical writing skills.
• Ability to work effectively with stakeholders, vendors, and cross-functional teams.
• Good verbal and written communication skills.

Preferred Certifications

Candidates with one or more of the following certifications will have an advantage:

• Microsoft Certified (Azure, Microsoft 365, Entra ID, Windows Server, Endpoint Administrator)
• Cisco CCNA
• Fortinet NSE / Network Security Certification
• VMware Certified Professional (VCP)
• ITIL 4 Foundation