Senior Network Engineer – TS/SCI | ACI & SDN Expert

IPSecure, Inc.; San Antonio (TX); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Unlimited Vacation

Sick Leave

Paid Federal Holidays

Education and Certification Reimburse-

401(k) retirement plan with safe harb—

Prepaid Legal Plan and Identity Plan

Accident Insurance

Critical Illness Insurance

Hospital Indemnity Insurance

Job summary

IPSecure, Inc. seeks a Senior Network Engineer to design, test, and secure enterprise network architectures in a lab-focused environment at JBSA Lackland, San Antonio, TX.

The role requires TS/SCI clearance and hands-on Cisco ACI, SDN, and firewall experience to validate networks before deployment. The successful candidate will work with cybersecurity, systems, and test teams to ensure robust, zero-trust network segmentation, scalable routing, and secure interconnections across L2/L3 domains in

Qualifications

• 10+ years of experience in network engineering, cybersecurity engineering, network security, or a related technical field.
• Hands-on experience configuring and troubleshooting enterprise routers, switches, and firewalls.
• Experience with Cisco ACI and Software‑Defined Networking (SDN).
• Strong understanding of IP networking, routing, switching, subnetting, VLANs, and network segmentation.
• Experience with virtualized infrastructure.
• Strong troubleshooting and root-cause analysis skills.
• Ability to develop and maintain detailed technical and network documentation.

Responsibilities

• Design, configure, integrate, secure, and troubleshoot enterprise network infrastructure within a lab and test environment.
• Engineer and support Cisco ACI architectures, including APIC controllers, leaf/spine architectures, tenants, VRFs, bridge domains, endpoint groups (EPGs), contracts, and external connectivity.
• Support SDN technologies and network automation concepts used to centrally manage and secure network infrastructure.
• Configure and troubleshoot Cisco routers and switches, including Layer 2 and Layer 3 networking.
• Develop and maintain IP addressing and subnetting schemes, VLANs, VRFs, routing domains, and network segmentation strategies.
• Configure and troubleshoot routing protocols such as BGP, OSPF, and static routing.
• Engineer and support enterprise firewall and network security solutions, including security policies, access control rules, NAT, VPN connectivity, network segmentation, and traffic inspection.
• Analyze network traffic and connectivity using packet captures, logs, monitoring platforms, and other network diagnostic tools.
• Perform cybersecurity hardening of network infrastructure in accordance with applicable security requirements and organizational standards.
• Identify network vulnerabilities, configuration weaknesses, unnecessary services, and segmentation issues and recommend appropriate remediation.
• Support implementation of Zero Trust and defense‑in‑depth network architectures, including segmentation and least‑privilege communications between systems and security zones.
• Build and maintain representative network environments used for integration, testing, troubleshooting, cybersecurity validation, and engineering development.
• Develop network diagrams, interface documentation, IP address plans, configuration documentation, test procedures, and engineering artifacts.
• Conduct configuration testing and validation prior to implementation within production or mission environments.
• Troubleshoot complex connectivity issues across routers, switches, firewalls, virtual networks, servers, and applications.
• Coordinate with cybersecurity, systems, virtualization, application, and engineering teams to identify and resolve cross‑domain infrastructure issues.
• Support change management, configuration management, technical documentation, and engineering review processes.

Skills

Cisco ACI

SDN

Routing & Switching

Firewalls

IP Addressing

Subnetting

Network Segmentation

Virtualization

Network Automation

Zero Trust

Education

Bachelor's degree in IT / CS / Cybersecurity

Tools

APIC

Job description

IPSecure, Inc. seeks a Senior Network Engineer to design, test, and secure enterprise network architectures in a lab-focused environment at JBSA Lackland, San Antonio, TX.

The role requires TS/SCI clearance and hands-on Cisco ACI, SDN, and firewall experience to validate networks before deployment. The successful candidate will work with cybersecurity, systems, and test teams to ensure robust, zero-trust network segmentation, scalable routing, and secure interconnections across L2/L3 domains in