Mid-Senior Network Engineer

| Chicago
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Summary: The Mid-Senior Network Engineer will be responsible for computer hardware, software and networking implementations for our client-facing sites. This role will also encompass daily work to develop, test, install, configure, and troubleshoot computer hardware, software, and networking systems. As part of this process, the network engineer will create proper internal and client-facing documentation, diagrams, and other detailed instructions. Local applicants only.


  • Provide 24x7x365 support for client-facing data center operations
  • Configure, support, and maintain routers, switches, network appliances, firewalls, and other communication devices
  • Prepare technical documentation necessary to communicate ideas, concepts, and details necessary to accomplish specific goals
  • Responsible for system performance; support/troubleshoot network and server issues
  • Responsible for monitoring and control of the status and performance of on-line network systems
  • Analyze network activity and network problems to discover and prevent systematic errors
  • Install, configure and/or support technical components, operating systems, network equipment and software, middleware components and network applications
  • Analyze network activity and network problems to discover and prevent systematic errors
  • Recommend network design changes/enhancements for improved systems availability and performance
  • Configure, test, and maintain LAN/WAN equipment and services, including switches, routers, firewalls, and VPN
  • Manage projects to ensure delivery of core metrics in terms of quality, delivery, cost and service
  • Collaborate with the Director of System Architecture to determine the forecasted work hours, travel and hardware required for a customer proposal
  • Maintain routines to ensure delivery of core engineering metrics in terms of project execution
  • Will be required to participate in on-call service rotation with other department employees 

Required Skills

  • Cisco Certified CCNA preferred
  • Extensive knowledge and work experience with networking protocols and network topologies
  • Experience with productivity, process, and quality improvement
  • Expert level proficiencies in network and security infrastructure (e.g., Routers, Switches, Firewalls, NAC and IDS systems.)
  • Experience in Cisco product line including Nexus/Catalyst Switches, Routers, and ASAs with Firepower
  • Experience with VMWare Vsphere 5.x
  • Experience with Lancope Stealthwatch is a plus
  • Experience with Virtualization is a plus
  • Effective organization, planning, problem solving and analytical skills
  • Service oriented collaborative approach to customer and peer relationships
  • Some travel required (10% - 15% on average)
  • Reliable means of transportation

Local Applicants Only.

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Please send your resume with "job title/Built In" in the subject line to [email protected]
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640 N. LaSalle, Chicago, IL 60654
640 N. LaSalle, Chicago, IL 60654

Insider's spotlight

How would you describe the company’s work-life balance?

5thColumn believes in a strong work-life balance: it keeps us healthy, both mentally and emotionally. We have an open PTO policy, great benefits, the option to work from home whenever we want, and the freedom to do what needs to be done both in and out of the office.


Director of Marketing

What are 5thColumn Perks + Benefits

Health Insurance & Wellness Benefits
Dental Benefits
Vision Benefits
Health Insurance Benefits
Onsite Gym
Retirement & Stock Options Benefits
Child Care & Parental Leave Benefits
Remote Work Program
Vacation & Time Off Benefits
Unlimited Vacation Policy
Generous PTO
Perks & Discounts
Beer on Tap
Casual Dress
Happy Hours

Additional Perks + Benefits

Full benefits package • Open PTO policy • Relaxed, flexible work environment • Young company • Drones, remote controlled planes, nerf guns, and other toys in the office • Each employee gets a brand new MacBook Pro • Weekly 'Tech on Tap' events for engineers and developers

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