Senior Network Security Engineer

Date: Aug 11, 2026

Location: TN, US

Company: International SOS

Overall Purpose Of The Job

International SOS is looking for a talented Sr. Network Security Engineer to help secure, design, operate, and maintain its IT network and security infrastructure for a key government contract. The ideal candidate would have a passion for solving technical problems and a drive for continually assessing and improving the technical environment in which they operate.

Key Responsibilities

  • Maintains data network hardware and systems including Azure and Cisco on-premise networks.
  • Investigates and resolves network and hardware issues of significance; researches, analyses, isolates and resolves errors.
  • Assesses and evaluates current and future systems
  • Monitor the IPS system for network intrusions and respond to incidents
  • Ensure IPS system and signatures are kept up-to-date.
  • Design networks on-premises or in the Azure government cloud as described in the project requirements and in line with architectural principles.
  • Develop and monitor key network metrics for input into IT reviews/reporting and monitoring.
  • Implement VPN and firewall rule, web filtering changes.
  • Perform hardware and software upgrades of network infrastructure like Cisco switches, Checkpoint firewalls, F5 Load balancers.

Required Skills and Knowledge

  • Cisco Nexus and Catalyst Switches
  • Checkpoint Firewalls and Intrusion Prevention
  • F5 Load Balancers
  • Microsoft Azure Networking (Virtual networks, Routing, Subnets, Express Route, VPN, Network Security Groups)
  • Networking Protocols/Concepts (Routing, VLAN, Subnetting, Load balancing, TCP/IP, DNS, HTTP, TLS, SSH)
  • Script Experience a plus - PowerShell, Python, Bash, or similar

Required Competencies

  • Goal/results focused.
  • Strong ability to analyse and solve problems.
  • Self-starter.
  • Available to manage multiple competing demands.
  • Comfortable with ambiguity.

Required Work Experience

  • 5+ Experience designing, building, and operating networks
  • 5+ Years Checkpoint Security
  • 5+ Years Cisco networking
  • 10+ Years in IT

Required Qualifications

  • Bachelor’s degree in Information Technology, Information Security, or equivalent 4 years additional experience in network security engineering.
  • Cisco Certified Network Associate (CCNA)
  • Azure Network Engineer Associate preferred 
  • This position does require a US Citizen who can obtain Tier 3/ Level II IT Security Clearance (previously referred to as ADP II Clearance) after being offered a position and maintaining clearance after starting with International SOS.

Required Languages

  • English
  • Any second language preferred.

Travel / Rotation Requirements

  • Not Required
  • On-call/after-hours support required as needed.