L3 Systems Administrator

Job Summary

We are looking for an experienced L3 Systems Administrator responsible for managing, maintaining, and troubleshooting enterprise IT systems and infrastructure. The role will serve as a senior technical escalation point for complex infrastructure and systems-related issues, requiring strong hands-on expertise in Windows Server administration, Active Directory, Microsoft 365, enterprise networking, and systems management. The successful candidate will be responsible for resolving complex technical incidents, performing root cause analysis, maintaining system stability and availability, and implementing infrastructure improvements to ensure reliable and secure IT operations.

Key Responsibilities

• Handle complex Level 3 technical escalations involving enterprise servers, operating systems, network infrastructure, and core IT systems.

• Perform advanced troubleshooting, root cause analysis, and resolution of critical infrastructure and system-related incidents.

• Administer, configure, and maintain Windows Server environments, including Active Directory, Group Policy, DNS, DHCP, and domain services.

• Manage and support Microsoft 365 and Microsoft Entra ID environments, including identity and access management, Exchange Online, and enterprise application administration.

• Configure, maintain, and troubleshoot enterprise network infrastructure, including LAN/WAN, routing, switching, firewalls, and VPN technologies.

• Perform server monitoring, system performance analysis, patch management, and infrastructure maintenance.

• Manage system configurations, access controls, security policies, and infrastructure-related changes.

• Investigate recurring system issues and implement preventive measures to improve infrastructure reliability, availability, and performance.

• Manage and support backup, recovery, and disaster recovery processes to ensure business continuity.

• Coordinate with infrastructure, cybersecurity, application teams, and external service providers to resolve complex technical issues.

• Participate in infrastructure upgrades, system implementations, migrations, and technology improvement initiatives.

• Develop and maintain technical documentation, infrastructure configurations, troubleshooting procedures, and operational standards.

• Provide technical guidance and support to Level 1 and Level 2 support teams on escalated infrastructure and systems-related concerns.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Computer Engineering, or a related field.

• At least 3 years of experience in Systems Administration, IT Infrastructure, Systems Engineering, or related technical roles.

• Proven experience handling Level 3 technical escalations and complex enterprise infrastructure issues.

• Strong hands-on experience in Windows Server administration, Active Directory, Group Policy, DNS, and DHCP.

• Solid experience administering Microsoft 365, Microsoft Entra ID (Azure AD), and Exchange Online environments.

• Strong knowledge of enterprise networking, including LAN/WAN, routing, switching, firewall management, and VPN technologies.

• Experience in server management, infrastructure monitoring, system performance optimization, and patch management.

• Knowledge of infrastructure security, access management, backup and recovery, and disaster recovery processes.

• Experience in root cause analysis, problem management, and IT infrastructure incident resolution.

• Strong analytical, technical documentation, communication, and problem-solving skills.

• Microsoft, Cisco, CompTIA, or ITIL certifications are an advantage.