Senior IT Systems & Network Engineer (Tier 3)

American-Freedom-Insurance; Mount Prospect (IL); On-site; USD 100,000 - 150,000; Full time

Benefits offered by this job

Competitive Salary

401K match

Health options

Telemedicine services

Growth & Stability

Work-life balance

Paid holidays

PTO

Personal days

Recognition program

Training reimbursement

Culture & events

Job summary

American-Freedom-Insurance seeks an onsite Tier 3 Senior Systems & Network Engineer to own and evolve the network, Windows Server, and cloud environments. You will architect, deploy, and support infrastructure while mentoring Tier 1–2 teams, ensuring security and reliability.

This role demands hands-on expertise in Hyper-V/VMware, Azure, Intune, and patch management, with a focus on modernization and scalable solutions for business growth. Hybrid work model may apply.

Qualifications

• 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.

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
• 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

Skills

Windows Server

Active Directory

DNS

DHCP

Group Policy

Networking

Firewall/VPNs

Hyper-V/VMware

Azure

Intune

Zabbix

Patch Management

Education

Bachelor's degree

Tools

Hyper-V

VMware

Azure

Intune

Zabbix

Job description

American-Freedom-Insurance seeks an onsite Tier 3 Senior Systems & Network Engineer to own and evolve the network, Windows Server, and cloud environments. You will architect, deploy, and support infrastructure while mentoring Tier 1–2 teams, ensuring security and reliability.

This role demands hands-on expertise in Hyper-V/VMware, Azure, Intune, and patch management, with a focus on modernization and scalable solutions for business growth. Hybrid work model may apply.