IT Technician Tier 3 – Senior Systems & Network Engineer

AMERICAN FREEDOM INSURANCE•Mount Prospect, IL

2h•$80,000 - $100,000•Onsite

About The Position

As an onsite Tier 3 Senior Systems & Network Engineer, you will serve as the highest level of technical escalation within the IT department. The role combines maintaining the reliability, performance, and security of existing infrastructure with engineering new solutions to support business growth and modernization. You will resolve complex issues that Tier 1 and Tier 2 support cannot address and architect and deploy new infrastructure. Networking is a core competency, alongside Windows Server, Microsoft Azure, Intune, infrastructure monitoring platforms, virtualization, and line-of-business application maintenance.

Requirements

5+ years of experience in IT infrastructure, systems administration, or network engineering.
Strong experience with Windows Server 2016, 2019, or 2022 environments.
Advanced knowledge of Active Directory, DNS, DHCP, and Group Policy.
Strong networking experience with switches, routers, VLANs, VPNs, and firewalls; required.
Experience troubleshooting server and network infrastructure issues.
Experience with virtualization, such as Hyper-V or VMware.
Hands-on experience with Microsoft Azure and hybrid cloud environments; required.
Proficiency with endpoint management tools, specifically Microsoft Intune; required.
Experience with infrastructure monitoring platforms such as Zabbix, or demonstrated ability and willingness to learn.
Experience supporting and maintaining line-of-business applications, including patching and vendor coordination.
Strong problem-solving and analytical skills.
Ability to mentor and support Tier 1 and Tier 2 technicians.

Nice To Haves

Bachelor’s degree in Information Technology, Computer Science, or a related field preferred.
Certifications such as CCNA, Microsoft Azure or Intune certifications, or equivalent preferred.

Responsibilities

Act as the highest escalation point for infrastructure, system, and network issues.
Maintain, support, and continuously improve server, network, and endpoint infrastructure.
Engineer and deploy infrastructure solutions from design through implementation, aligned with business growth and modernization goals.
Own and evolve network infrastructure, including firewalls, routers, switches, VLANs, and VPNs.
Troubleshoot and resolve complex issues across servers, endpoints, and network systems.
Manage and maintain Windows Server environments and Active Directory infrastructure.
Monitor system and network performance using platforms such as Zabbix; deploy and manage monitoring and alerting solutions.
Own and administer Microsoft Azure and hybrid cloud environments.
Deploy, manage, and maintain endpoint environments using Microsoft Intune.
Support and maintain line-of-business applications, including patching, updates, and vendor coordination.
Support virtualization environments and ensure system availability and performance.
Assist with infrastructure projects, including migrations, deployments, and integrations.
Provide technical guidance and escalation support to Tier 1 and Tier 2 teams.
Maintain technical documentation, network diagrams, and system procedures.
Ensure security best practices, patch management, and system hardening standards are followed.
Evaluate and recommend technologies to improve infrastructure efficiency and reliability.

Benefits

Competitive salary.
401(k) with up to a 6% company match.
Choice of Blue Cross Blue Shield PPO, HMO, or HSA health plans.
Dental and vision coverage.
Access to telemedicine services.
At least 6 paid holidays.
Paid time off that can be used for vacation, personal, or sick time.
Separate personal days for sickness, family needs, appointments, or personal matters.
Paid training.
State licensing reimbursement.
Opportunities for advancement.
Employee referral bonuses.
Employee recognition for work milestones.