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International SOS

Senior Network Security Engineer

TN, United States

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Job details

Experience: Bachelor’s degree in Information Technology, Information Security, or equivalent 4 years additional experience in network security engineering.
Posting language: English
Posted: Oct 21, 2026

Original job description

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.

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More about this job

Skills

Microsoft Azure
IPS
Reporting
VPN
Route
DNS
Microsoft PowerShell
Python
Bash
Computer technology
Cybersecurity
CCNA
ADP

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