Senior Network Security Engineer

Join a mission-critical team as a Senior Network Security Engineer in San Antonio, TX. This onsite role offers a competitive salary of $115,000 to $140,000 per year and the opportunity to support a key government contract, securing both Azure government cloud and on-premises networks. The position requires U.S. citizenship with the ability to obtain Tier 3/ Level II IT Security Clearance after offer, and a Bachelor’s degree with 5+ years of relevant experience. You will design, operate, and protect IT network infrastructure using Cisco Nexus and Catalyst switches, Checkpoint security, and F5 load balancers.

The role emphasizes hands-on work with critical network components and ongoing security monitoring and incident response, with a focus on reliability and compliance within a government context.

Responsibilities

• Maintains data network hardware and systems including Azure and Cisco on-premise networks.
• Investigates and resolves significant network and hardware issues; researches, analyzes, isolates, and resolves errors.
• Assesses and evaluates current and future systems.
• Monitors the IPS system for network intrusions and responds to incidents.
• Ensures IPS system and signatures are kept up-to-date.
• Designs networks on-premises or in the Azure government cloud in line with project requirements and architectural principles.
• Develops and monitors key network metrics for IT reviews, reporting, and monitoring.
• Implements VPN and firewall rule and web filtering changes.
• Performs hardware and software upgrades of network infrastructure such as Cisco switches, Checkpoint firewalls, and F5 load balancers.

Requirements

• 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
• Goal and results oriented
• Strong analytical and problem-solving skills
• Self-starter with the ability to manage multiple competing demands
• Comfortable with ambiguity
• 5+ years designing, building, and operating networks
• 5+ years Checkpoint Security
• 5+ years Cisco networking
• 10+ years in IT
• Bachelor’s degree in Information Technology, Information Security, or equivalent plus 4 years additional experience in network security engineering
• Cisco Certified Network Associate
• Azure Network Engineer Associate preferred
• US citizen able to obtain Tier 3/ Level II IT Security Clearance after offer and maintain clearance after onboarding
• English proficiency
• Any second language preferred
• On-call/after-hours support required as needed
• Travel: Not required