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Senior Network Security Engineer


Mosaic451 is seeking a Senior Network Security Engineer with experience managing, securing and working in mission-critical heterogeneous network environments for a customer in Charlotte, NC.  The individual must have hands-on experience configuring, managing, and troubleshooting firewalls from CheckPoint, as well as devices from F5 and Cisco.  The Network Security Engineer will also work closely with other IT Infrastructure departments and as such will need to be a quick start, resourceful, task focused, and able to communicate customer needs effectively back to the Mosaic451 Team.



  • Supports and plans firewall and network system upgrades and moves/adds/changes for our customer and coordinates with other Mosaic451 engineers
  • Provides specifications and create detailed network architecture drawings as required
  • Provides specific detailed information for hardware and software selection, implementation techniques and tools for the most efficient solution to meet business needs, including present and future capacity requirements
  • Strong understanding of enterprise, network, system, and application level security issues
  • Conducts testing and validation of network designs prior to implementation
  • Comfortable working on both Linux-based and MS Windows-based system platforms with a strong IT technical understanding and aptitude for analytical problem-solving
  • Maintains technical expertise in areas of networking technologies and security
  • Evaluates and reports on new communications technologies to enhance capabilities of the network
  • Works with configuration management to ensure compliance with architecture
  • Familiar with working within a strict change management program
  • Strong problem solving skills


  • Individual must have 3-5 years of experience managing and securing CheckPoint/Cisco/F5 equipment, including firewalls, switches, routers, and management appliances.
  • Excellent written and oral communication skills
  • Strong analytical skills and demonstrated ability to “think outside-the-box.”
  • Experience with Network Monitor tools such as Nagios XI or Solarwinds.




  • Bachelor’s Degree in Computer Science or related field (preferred but not required)
  • CCNA preferred but not required
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