Senior Network Security Engineer

VAE, Inc.

$100K — $130K *
Aerospace & Defense
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 8+ years of IT/network engineering experience.
  • Expertise in TCP/IP, IPv4, and network troubleshooting.
  • Hands-on experience with Cisco and Juniper devices.
  • Knowledge of Access Control Lists and network security best practices.
  • Experience with Windows Server and Linux distributions.
  • Proficiency in virtualization platforms like VMware ESXi.
  • Familiarity with DoD STIG implementation.
  • Proficient in DNS/DHCP administration and system monitoring.
  • Active Secret Clearance required.
  • IAT Level II certification (Security+ or equivalent)

Responsibilities

  • Design, implement, and maintain complex enterprise information systems and networks.
  • Proactively monitor, troubleshoot, and resolve hardware, software, and network issues.
  • Maintain and update physical systems, virtual environments, and networking solutions.
  • Lead or contribute to the design and deployment of system enhancements.
  • Perform root-cause analysis on operational or performance issues.
  • Ensure systems comply with DoD STIGs and security requirements.

Benefits

  • Work on mission-critical systems in a secure, enterprise-level environment.
  • Collaborate with seasoned engineers committed to innovation.
  • Opportunity to expand skills across network, systems, and security domains.
Full Job Description
OVERVIEW

Job Type

Full-time

Location

Washington, DC, US (Primary)

Job Description

VAE, Inc. designs, deploys, and sustains mission-critical enterprise IT environments supporting federal customers. We're seeking an experienced Senior Network Engineer who enjoys hands-on technical work, takes ownership of complex environments, and can operate independently while collaborating with a small, high-performing engineering team.

This role is ideal for a seasoned engineer who prefers deep technical responsibility over people management and values long-term stability in a secure environment.

What You'll Do
  • Design, implement, and sustain enterprise network infrastructures supporting high availability and mission operations
  • Serve as a senior technical resource for network troubleshooting, outage resolution, and performance optimization
  • Perform root-cause analysis on complex network issues and drive permanent fixes
  • Configure, maintain, and troubleshoot Cisco and Juniper routing and switching platforms
  • Configure, administer, and troubleshoot Cisco Identity Services Engine (ISE), including policy sets and authentication/authorization workflows
  • Configure and support next-generation firewalls, including Juniper SRX and Cisco Firepower platforms
  • Support firewall rule management, policy validation, and traffic-flow troubleshooting across secured boundaries
  • Maintain accurate technical documentation, diagrams, and standard operating procedures
  • Participate in planning and implementation of network upgrades and architectural improvements
  • Ensure compliance with DoD security and configuration standards

Why This Role
  • Own and influence a mission-critical enterprise network, not just tickets
  • Work in a stable, security-focused environment with long-term programs
  • Be part of a small, senior engineering team where expertise is valued
  • Opportunity to deepen skills in network security, access control, and boundary protection


Qualifications

  • 8+ years of hands-on network engineering experience in enterprise or government environments
  • Strong understanding of TCP/IP, IPv4, routing, switching, and network troubleshooting
  • Proven experience with Cisco and/or Juniper network devices
  • Hands-on experience configuring and administering Cisco ISE
  • Experience supporting Juniper SRX firewalls and Cisco Firepower (FMC-managed)
  • Strong understanding of firewall policies, security zones, and traffic inspection
  • Familiarity with DoD STIGs and operating in compliance-driven environments
  • CCNA, CCNP, JNCIS, or JNCIP certification (active or previously held)
  • Ability to work on-site in Washington, DC (5 days per week)
  • Active Top Secret clearance (required to start)
  • DoD 8570 IAT Level II certification (Security+ or equivalent)

Desired (Nice-to-Have) Skills
  • Experience integrating Cisco ISE with 802.1X, TACACS+, or network access control workflows
  • Exposure to advanced firewall features such as IDS/IPS, URL filtering, or application-layer inspection
  • Familiarity with vulnerability scanning tools (e.g., Nessus)
  • Basic scripting or automation exposure (PowerShell, Ansible, etc.)


Clearance Level

Top Secret

Certifications

CCNA, CCNP, JNCIS, or JNCIP certification (active or previously held) and DoD 8570 IAT Level II

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