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Tier 3 Infrastructure Engineer
Job in
Danbury, Fairfield County, Connecticut, 06813, USA
Listed on 2026-05-31
Listing for:
Top Prospect Group
Full Time
position Listed on 2026-05-31
Job specializations:
-
Engineering
Systems Engineer, Cybersecurity
Job Description & How to Apply Below
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.
- 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.
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