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Cybersecurity Network Engineer

IPSecure

Job Location:

San Antonio, TX - USA

Monthly Salary: Not provided by the employer

Posted: 1 October 2026 (Yesterday)

Application Deadline: 29 December 2026

Vacancies: 1 Vacancy

Job Summary

Cybersecurity Network Engineer TS/SCI Clearance Required JBSA Lackland - San Antonio TX

Job Description

We are seeking an experienced Cybersecurity Network Engineer to support the design integration configuration testing and security of advanced network infrastructure within a lab-based engineering environment. This position requires a strong combination of traditional network engineering cybersecurity and modern software-defined networking experience.

The ideal candidate will have extensive hands-on experience with Cisco Application Centric Infrastructure (ACI) Software-Defined Networking (SDN) Cisco routing and switching enterprise firewalls IP addressing and subnetting network segmentation and virtualization technologies.

This position will work directly with engineering cybersecurity systems administration and test teams to build configure secure troubleshoot and validate network architectures prior to deployment into operational environments.

Job 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 Software-Defined Networking (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.

Cisco ACI / SDN Requirements:

Candidates should possess hands-on experience with Cisco Application Centric Infrastructure (ACI) and software-defined networking concepts including:

Cisco APIC administration and configuration
ACI leaf/spine architecture
Tenants and VRFs
Bridge Domains (BDs)
Endpoint Groups (EPGs)
Application Profiles
ACI Contracts and Filters
Physical and virtual domains
VLAN pools
External Layer 2/Layer 3 connectivity
L3Out configuration
Routing integration
Network segmentation and micro-segmentation
ACI troubleshooting and fault analysis
SDN policy-based networking
Network automation and programmable infrastructure concepts
Experience integrating ACI with virtualized environments firewalls external routing infrastructure and traditional Cisco networks is highly desired.

Basic Qualifications

Security Clearance: Active TS/SCI

Education: Bachelors degree in Information Technology Computer Science Cybersecurity Information Systems Engineering or related discipline. Equivalentexperiencemay be substituted.

Certification: Security and CCNA

Experience:

10 years of experience in network engineering cybersecurity engineering network security or a related technical field.
Demonstrated hands-on experience configuring and troubleshooting enterprise routers switches and firewalls.
Demonstrated experience with Cisco ACI and Software-Defined Networking (SDN).
Strong understanding of IP networking routing switching subnetting VLANs and network segmentation.
Experience supporting complex lab integration test development or production network environments.
Experience working with virtualized infrastructure.
Strong troubleshooting and root-cause analysis skills.
Ability to develop and maintain detailed technical and network documentation.

Preferred Qualifications

One or more of the following certifications:

Cisco CCNP Enterprise
Cisco CCNP Data Center
Cisco Certified DevNet Professional
Cisco ACI-focused training/certification

Benefits

Medical Dental Vision Unlimited Vacation Sick Leave Paid Federal Holidays Education and Certification Reimbursement Program 401(k) retirement plan with safe harbor employer match after 3 months Prepaid Legal Plan and Identity Protection Plan available Accident Insurance Critical Illness Insurance and Hospital Indemnity Insurance available.

EEOC Statement

IPSecure does not discriminate based on race color religion sex sexual orientation gender identity national origin disability or status as a protected veteran.

Required Experience:

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