IT Infrastructure Engineer

ambercare

$80K — $90K *
Lisle, IL 60532In-Person
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of infrastructure engineering experience
  • Hands-on expertise with Cisco routers, switches, wireless, and VPN technologies
  • Proficiency in administering Palo Alto firewalls
  • Experience with Microsoft 365 / Azure / Entra / MS Teams Phones
  • Knowledge of Windows Servers (2019-2022) and Hyper-V virtualization
  • Experience in supporting multi-site environments
  • Strong troubleshooting and root-cause analysis skills

Responsibilities

  • Support and maintain enterprise infrastructure across WAN, LAN, and Voice environments
  • Administer Cisco network infrastructure including routers, switches, and wireless access points
  • Manage Palo Alto network firewalls
  • Oversee Microsoft 365, including Entra ID and Teams voice integration
  • Support Hyper-V virtualization and Windows Server environments
  • Lead troubleshooting efforts for branch outages, ensuring rapid service restoration
  • Maintain and document technical information and infrastructure setups

Benefits

  • Medical, Dental and Vision coverage
  • 401k retirement plan
  • Paid Time Off (PTO) and Paid Holidays
  • Life Insurance coverage
  • Opportunities for Continued Education
  • Employee Discounts
Full Job Description
Position Summary:

The Infrastructure Engineer is responsible for the design, implementation, and support of Addus' enterprise infrastructure across over 200+ locations. This role supports core systems including network, server, virtualization, voice, and cloud platforms, ensuring high availability and performance across all sites.

Work Schedule:
  • Monday - Friday (10:00 AM - 7:00 PM)
  • 4 days onsite - Lisle, IL
  • On Call Rotation

Compensation & Benefits:
  • Salary: $80,000 - $90,000
  • Medical, Dental and Vision
  • Retirement (401k)
  • PTO + Paid Holidays
  • Life Insurance
  • Continued Education
  • Employee Discounts

Key Responsibilities
  • Support and maintain enterprise infrastructure across WAN, LAN, and Voice, and Virtualization environments
  • Administer Cisco network infrastructure (routers, switches, wireless)
  • Administer Palo Alto network firewalls
  • Manage Microsoft 365 / Entra ID
  • Support Microsoft Teams voice and telephony (Auto Attendants, Call Queues, Operator Connect)
  • Support Hyper-V virtualization environment
  • Administer and support Windows Server (2019-2022), including:
    • Active Directory, DNS, DHCP, Group Policy
    • File Services / DFS
  • Lead troubleshooting and resolution of branch outages (ISP, VPN, voice), ensuring timely service restoration
  • Monitor infrastructure and respond to alerts (including after-hours)
  • Manage vendors, ISPs, and service providers
  • Perform patching and upgrades of systems
  • Maintain enterprise backup, DR, and storage platforms
  • Participate in scheduled on-call rotation and off-hours support
  • Maintain technical documentation
  • Assist with infrastructure projects, migrations, and acquisitions
  • Contribute to continuous improvement of infrastructure, processes, and standards

Required Qualifications
  • 5+ years of infrastructure engineering experience
  • Hands-on experience with:
    • Cisco network infrastructure (routers, switches, wireless), including experience with VPN technologies such as DMVPN and IPsec tunnels
    • Palo Alto firewalls
    • Microsoft 365 / Azure / Entra / MS Teams Phones
    • Windows Servers (2019-2022)
    • Hyper-V Virtualization
  • Experience supporting multi-site environments
  • Experience working with ISPs and troubleshooting connectivity issues
  • Strong troubleshooting and root-cause analysis skills

Key Competencies
  • Ability to work independently in a fast-paced environment
  • Strong communication with both technical and non-technical users
  • Ownership mindset for incidents and systems
  • Ability to prioritize during outages and incidents

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