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Network Infrastructure Engineer Jobs in Illinois

TriOptus LLC

Infrastructure Engineer II

Lake Forest, IL · On-site

$90/hr

... network and client technologies. Infrastructure engineers love to solve difficult problems and ... embrace curiosity in the pursuit to exceed customer expectations. They pursue the physical design ...

SAIC

IL · On-site

$80K - $120K/yr

BA/BS and 4+ years of experience in network engineering or infrastructure operations. * Active DoD Secret clearance with ability to obtain TS/SCI. * IAT Level II certification, such as: Security ...

Neshent Technologies

IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Bensenville, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Stone Park, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Elmhurst, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Chicago, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Northlake, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

TransMarket Group

Infrastructure Engineer

Chicago, IL · On-site

$110K - $145K/yr

Working with network engineers to reliably upgrade and replace old network equipment * Developing ... Experience with infrastructure management tools (Ansible, Puppet) * Good management skills with ...

Neshent Technologies

Network Engineer

Niles, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

River Forest, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Hillside, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

Neshent Technologies

Network Engineer

Des Plaines, IL · Hybrid

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure across multiple office locations. The ideal candidate will have strong expertise in Cisco ...

New

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Showing results 21-40

All JobsNetwork Infrastructure Engineer JobsNetwork Infrastructure Engineer Jobs in Illinois

Network Infrastructure Engineer information

See Illinois salary details

$45.1K

$123.1K

$176.4K

How much do network infrastructure engineer jobs pay per year?

As of Aug 10, 2026, the average yearly pay for network infrastructure engineer in Illinois is $123,130.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,200.00 and $136,600.00 per year, depending on experience, location, and employer.

What are some typical challenges faced by network infrastructure engineers when working on large-scale network deployments?

Network Infrastructure Engineers often encounter challenges such as ensuring network scalability, minimizing downtime during upgrades, and maintaining robust security protocols. Large-scale deployments require careful planning to integrate new hardware and software without disrupting existing services. Collaborating closely with cross-functional teams, such as security specialists and system administrators, is essential to address compatibility issues and deliver seamless network performance. Staying up to date with emerging technologies also helps in proactively solving potential bottlenecks.

What are the key skills and qualifications needed to thrive as a network infrastructure engineer?

To thrive as a Network Infrastructure Engineer, you need expertise in network design, troubleshooting, and security, typically supported by a degree in computer science or a related field. Familiarity with network hardware, protocols, and certifications such as Cisco CCNA/CCNP or CompTIA Network+ is often required. Strong problem-solving abilities, attention to detail, and effective communication skills help you excel in this role. These skills ensure reliable, secure, and high-performing network environments essential for business continuity and growth.

What does a network infrastructure engineer do?

A network infrastructure engineer designs, implements, and maintains an organization’s computer network systems, including routers, switches, firewalls, and servers. They troubleshoot network issues, optimize performance, and ensure security, often using tools like network monitoring software and earning certifications such as Cisco CCNA or CompTIA Network+. Their work supports reliable communication and data transfer within the organization.

What is the difference between Network Infrastructure Engineer vs Network Administrator?

AspectNetwork Infrastructure EngineerNetwork Administrator
CertificationsCCNA, CompTIA Network+CCNA, CompTIA Network+
Work EnvironmentDesigning, implementing, and maintaining network infrastructureManaging and supporting existing network systems
ResponsibilitiesNetwork design, hardware setup, troubleshooting complex issuesMonitoring network performance, user support, routine maintenance

While both roles require similar certifications and work in network environments, the Network Infrastructure Engineer focuses on designing and building network systems, whereas the Network Administrator manages and maintains existing networks. The Engineer's role is more project-oriented, while the Administrator handles daily operations.

What are popular job titles related to Network Infrastructure Engineer jobs in Illinois? For Network Infrastructure Engineer jobs in Illinois, the most frequently searched job titles are:
What job categories do people searching Network Infrastructure Engineer jobs in Illinois look for? The top searched job categories for Network Infrastructure Engineer jobs in Illinois are:
What cities in Illinois are hiring for Network Infrastructure Engineer jobs? Cities in Illinois with the most Network Infrastructure Engineer job openings:
Network Infrastructure Engineer jobs near you
Infographic showing various Network Infrastructure Engineer job openings in Illinois as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 12% Part Time, and 6% Contract. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution, with an average salary of $123,130 per year, or $59.2 per hour.

Senior Network Infrastructure Specialist

Science Applications International Corporation

Scott Air Force Base, IL • On-site

Full-time

Re-posted 20 days ago

SAIC rating

7.9

Company rating: 7.9 out of 10

Based on 79 frontline employees who took The Breakroom Quiz

78th of 223 rated it services

Job description

SAIC is seeking a Senior Network Infrastructure Specialist to support highvisibility and missioncritical network operations for the U.S. Transportation Command (USTRANSCOM). This role supports enterpriselevel infrastructure within a global DoD environment and requires independent technical leadership, infrastructure design expertise, and oversight of junior staff.
The successful candidate will operate with minimal supervision, lead complex tasks, and ensure secure, reliable, and resilient network operations across multiple transport mediums and global WAN environments.

Key Responsibilities:
 

  • Develop strategies and design network infrastructure to meet organizational and mission objectives.
  • Advise leadership on technology purchases involving data storage, processing, network access, and application development.
  • Assess feasibility of future projects and provide expert recommendations.
  • Provide deep technical expertise in routing protocols (OSPF, BGP), IPv6, VPN technologies, and global WAN backbone operations.
  • Support secure and nonsecure wireless communication infrastructure, network connectivity, and associated services.
  • Coordinate and execute cryptographic circuit maintenance.
  • Install and maintain the network transport medium (fiber, copper, wireless), including user access drops.
  • Perform planned upgrades and maintenance while minimizing operational disruption.
  • Provide DNS and SMTP support, IP address management, and VLAN configuration.
  • Collect, analyze, and report network availability metrics on a recurring and adhoc basis.
  • Maintain comprehensive technical documentation including, physical and logical network architecture diagrams, equipment room layouts with rack elevations Inside/outside plant specifications, & hardware configurations.
  • Respond to network incidents, provide afteraction reporting, and support service recovery.
  • Adhere to established processes to ensure compliance with service level agreements.
SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

Required Qualifications:

  • BA/BS and 4+ years of experience in network engineering or infrastructure operations.
  • Active DoD Secret clearance with ability to obtain TS/SCI.
  • IAT Level II certification, such as: Security+, CCNASecurity, CySA+, GICSP, GSEC, CND, or SSCP.
  • At least one Computing Environment certification (Cisco, Splunk, McAfee, etc.).
  • Experience installing and maintaining DoD networks in compliance with security requirements.
  • Strong expertise in routing protocols (OSPF, BGP), IPv6, VPN, and global WAN environments.
  • Proficiency with Microsoft Office tools including Word, PowerPoint, Visio, and Excel.
  • Demonstrated experience producing accurate and comprehensive technical documentation.
  • Strong communication skills for interacting with personnel of varying technical backgrounds.

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