Remote Tier 3 Infrastructure Engineer - Windows & Networking

Top Prospect Group; Connecticut; On-site; USD 90,000 - 95,000; Full time

Job description

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.