Hybrid Work Environment / 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, O365, 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.