• Location: Chantilly, Virginia
  • Type: Contract
  • Job #2786

Title: Senior Network Engineer 
Location: Chantilly, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government.  Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission.  Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems.  If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

  • Performs a wide variety of duties, including installations, debugging, maintenance, upgrades and general support of Cisco and Juniper network equipment.  
  • Capable of applying sound engineering practices and technical skills to achieve both short and long-term goals as established by management.  
  • Assist in the configuration and deployment of core and peripheral network devices, which will require continuous learning of new devices.  
  • Analyze customer requirements and provides solutions to a variety of technical problems of varying degrees of complexity. 
  • Perform maintenance and upgrade of networks, including routers, switches, firewalls, remote access systems, environmental units and networks. 
  • Maintain network integrity and connectivity while ensuring compliance with policies, as well as maintains system backup and recovery capabilities. 
  • Proactively monitor of all network devices, services, and servers using a combination of tools to ensure high availability. 
  • Maintain current knowledge and documentation of relevant technology and processes. 
  • Manage and troubleshoot network connectivity through the office. 
  • Provide end-user support and issue resolution. 
  • Provide helpdesk support for network issued and responds to requests for IT support. 
  • Ability to effectively communicate issues and resolutions to all levels of the organization. 
  • Support emergency 24 X7 on-call support, on a rotational basis. 


  • Bachelor's Degree in related technical discipline OR equivalent work experience in lieu of degree 
  • At least 9 years of experience supporting network engineering experience performing maintenance and upgrades of networks, including routers, switches, firewalls, remote access systems. 
  • Experience working within commercial cloud providers (AWS, GCP, Azure, etc…). 
  • Experience with data center/enterprise operational maintenance support 
  • Experience in maintaining and troubleshooting Cisco and Juniper networks, to include performance issues and working with network monitoring tools 
  • Solid understanding of network fundamentals, TCP/ICP routing, switching, firewalls and VPNs, Ethernet, routing concepts and routing protocols, VLANs, IP Addressing, Subnetting and VPN 
  • Understanding or knowledge of cloud network concepts 
  • Strong interpersonal and communication skills need to work with key stakeholders, engineering subject matter experts, and vendors. 
  • Quick learner and detail oriented 
  • Able to prioritize in a fast moving and high pressure, constantly changing environment 
  • Strong time-management skills 
  • Ability to work in a team environment, as well as independently 
  • Able to support rotating on-call and after-hours support 

 Desired Qualifications 

  • Network certification, to include one or more of the following: 
    • Cisco Certified Network Professional Routing and Switching (CCNP R&S) 
    • Cisco Certified Network Associate (CCNA) 
    • Cisco Certified Network Professional (CCNP) 
    • Cisco Certified Internetwork Expert (CCIE) 
    • AWS Certified Solutions Architect
    • AWS Certified Advanced Networking 
    • Juniper Networks Certified Internetwork Associate – Enterprise Routing and Switching (JNCIA-Junos) 
    • Juniper Networks Certified Internetwork Specialist- Enterprise Routing and Switching (JNCIS-Ent) 
    • Juniper Networks Certified Internetwork Professional – Enterprise Routing and Switching (JNCIP-ENT) 
    • Juniper Networks Certified Internetwork Associate – Security (JNCIA-Sec) 
    • Juniper Networks Certified Internetwork Specialist – Security (JNCIS-Sec) 
    • Juniper Networks Certified Internetwork Professional – Security (JNCIP-Sec) 


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