Tier 3 Infrastructure Engineer

Responsibilities: Provide Tier 3 support for Windows servers, Active Directory, Exchange, and related applications. Configure, monitor, and maintain core infrastructure components, including networking switches, routers, and firewalls. Troubleshoot and resolve escalated system, server, and networking issues to minimize downtime. Perform system upgrades, patching, and migrations while ensuring minimal business disruption. Collaborate with Tier 1 and Tier 2 teams to provide mentorship and knowledge transfer. Implement and enforce security best practices, monitoring systems for vulnerabilities and threats. Manage backups, disaster recovery, and business continuity planning for critical infrastructure. Document infrastructure configurations, processes, and troubleshooting procedures. Participate in on-call rotation for critical incidents as required.

Qualifications: Proven experience as a Tier 3 Infrastructure Engineer, Systems Engineer, or similar role. Strong expertise in Windows Server environments, Active Directory, and related enterprise applications. Hands-on experience with networking hardware (switches, routers, firewalls) and protocols (TCP/IP, DNS, DHCP, VPN). Knowledge of virtualization platforms (VMware, Hyper-V) and cloud services (Azure, AWS) is a plus. Familiarity with security frameworks and compliance standards. Excellent problem-solving and communication skills. Relevant certifications such as Microsoft (MCSA/MCSE), Cisco (CCNA/CCNP), or CompTIA Security+ are highly desirable.