IT Technician Tier 3 – Senior Systems & Network Engineer

Role summary

IT Technician Tier 3 – Senior Systems & Network Engineer is a role at AMERICAN FREEDOM INSURANCE in Mount Prospect, Illinois, United States (on-site). Posted 2026-09-02. Salary: USD 80,000–100,000 per year. Experience level: 5-10.

Job title

IT Technician Tier 3 – Senior Systems & Network Engineer

Company

AMERICAN FREEDOM INSURANCE

Location

Mount Prospect, Illinois, United States

Work arrangement

on-site

Category

DevOps & Infrastructure

Salary

USD 80,000–100,000 per year

Experience level

5-10

Date posted

2026-09-02

Job description

Description

As an onsite Tier 3 Senior Systems & Network Engineer, you will serve as the highest level of technical escalation within the IT department. This role carries a dual mandate: maintaining the reliability, performance, and security of existing infrastructure, and engineering new solutions that support business growth and modernization. You will handle complex technical issues that cannot be resolved by Tier 1 or Tier 2 support while simultaneously architecting and deploying next-generation infrastructure. Networking is a core competency for this role — you will own and evolve the organization’s network environment alongside Windows Server, Microsoft Azure, Intune, infrastructure monitoring platforms, and line-of-business application maintenance.

Responsibilities

Act as the highest escalation point for infrastructure, system, and network issues

Maintain, support, and continuously improve existing server, network, and endpoint infrastructure

Engineer and deploy new infrastructure solutions from design through implementation, aligned with business growth and modernization goals

Own and evolve the organization’s network infrastructure — including firewalls, routers, switches, VLANs, and VPNs — both maintaining current environments and designing improvements

Troubleshoot and resolve complex technical 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 infrastructure monitoring and alerting solutions

Architect and lead deployment of new infrastructure solutions aligned with business growth and modernization goals

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 new technologies to improve infrastructure efficiency and reliability

Requirements

Bachelor’s degree in Information Technology, Computer Science, or related field preferred

5+ years of experience in IT infrastructure, systems administration, or network engineering

Strong experience with Windows Server (2016/2019/2022) environments

Advanced knowledge of Active Directory, DNS, DHCP, and Group Policy

Strong networking experience including switches, routers, VLANs, VPNs, and firewalls – required

Experience troubleshooting both server and network infrastructure issues

Experience with virtualization (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

Certifications such as CCNA, Microsoft certifications (Azure, Intune), or equivalent preferred

Benefits: AFIC offers a competitive salary and a comprehensive benefits package to support you

Competitive Salary: Rewarding your expertise and experience

Financial Security: 401K with up to a 6% company match

Health & Wellness: Choice of Blue Cross Blue Shield PPO, HMO, or HSA plans, Dental and vision coverage, Access to telemedicine services

Growth/Stability: Over 12 consecutive years of profitable growth, confirmed by A+ Superior rating by A.M. Best

Work-Life Balance: Monday-Friday, 8 am-5 pm CST (Weekends- if needed)

Holidays: At Least 6 Paid Holidays

Paid Time Off (PTO): PTO that can be used for vacation, personal, or sick time

Personal Days: Separate personal days for sickness, family needs, appointments or personal matters

Employee Recognition: We celebrate work milestones to show appreciation for your contributions

Professional Growth: Paid training, state licensing reimbursement, and opportunities for advancement

Positive Culture: Enjoy our inclusive holiday events, employee referral bonuses, virtual team meetings, and more