Tier 3 Infrastructure Engineer

Hybrid Work to Start ---> Remote / 90-95k / Hartford County, CT

We are seeking a highly skilled Tier 3 Infrastructure Engineer to support, maintain, and enhance our enterprise IT infrastructure. This role requires deep expertise in Windows servers and related applications, as well as strong hands-on experience with networking technologies including switches, firewalls, and routing. The Tier 3 Engineer will serve as an escalation point for complex issues, lead infrastructure projects, and ensure the stability, security, and scalability of systems across the organization.

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.