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From the employer's careers site First seen 25 Oct 2026

Network Security Engineer Senior

GDIT Ashburn, VA On-site senior full-time

Salary

$124,093 - $167,325 per year

Apply on GDIT

Description

The U.S. Customs and Border Protection (CBP) Cyber Security Directorate (CSD) is leading one of the most comprehensive, mission critical cybersecurity operations in the federal government, protecting the digital infrastructure that safeguards America’s borders.

The Network Security Engineer Senior will support teams at the forefront of national security, supporting sophisticated cyber operations that defend vital systems, enable secure mission execution, and counter rapidly evolving threats.

Responsibilities:

  • Lead the design, engineering, and lifecycle management of enterprise network security infrastructure including firewalls, intrusion detection and prevention systems (IDS/IPS), VPN solutions, and network access control technologies.
  • Provide expert analysis of network security architectures, identify vulnerabilities, and develop mitigation strategies that align with federal and organizational security requirements.
  • Monitor and interpret complex network security events, guide investigations of advanced threats, and direct response and containment activities as needed.
  • Recommend and implement security enhancements to improve resilience, reduce attack surface, and support continuous modernization of the network security environment.
  • Develop, review, and enforce network security policies, standards, and procedures to meet compliance obligations under frameworks such as NIST, CIS, and other regulatory requirements.
  • Serve as a technical advisor to leadership and cross-functional teams, ensuring secure design principles are embedded into program initiatives, system upgrades, and enterprise architecture decisions.
  • Provide mentorship, technical guidance, and quality oversight to junior and mid-level engineers to promote professional growth and ensure consistent engineering excellence.
  • Develop, document, and maintain network security policies, procedures, and standards.
  • Ensure compliance with applicable security frameworks, regulatory requirements, and organizational policies.
  • Collaborate with IT, security operations, and infrastructure teams to support secure network design and operations.

Requirements:

  • Minimum of seven (7) years of hands-on network or security engineering experience.
  • Experience with enterprise-grade firewalls, IDS/IPS, VPNs, and NAC tools.
  • Detailed understanding of network protocols, architecture, and security best practices.
  • Expertise maintaining network security infrastructure including firewalls, intrusion detection and prevention systems, VPNs, and network access controls.
  • Proficiency providing expert analysis of network security architectures and developing solutions to protect network assets from threats and vulnerabilities.
  • Experience monitoring network security events, investigating security incidents, and implementing security enhancements to strengthen network defenses.
  • Expertise developing network security policies, procedures, and standards while ensuring compliance with security frameworks and regulatory requirements.
  • Experience monitoring and responding to security incidents.
  • Familiarity with regulatory and compliance frameworks (e.g., NIST, ISO 27001, CIS).

Benefits:

  • Medical plan options, some with Health Savings Accounts
  • Dental plan options
  • Vision plan
  • 401(k) plan with company match
  • Flex work weeks
  • Paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave
  • Short and long-term disability benefits
  • Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance

Skills

Required

  • Cybersecurity
  • Cybersecurity Operations
  • IT Network Security
  • Network Security Tools
  • firewalls
  • IDS/IPS
  • VPNs
  • NAC tools
  • network protocols
  • network architecture
  • security best practices

Nice to have

  • CISSP
  • CCSP
  • CCNP Security
  • CompTIA Security+
  • CCNA or CCNA Security

Ready to apply?

You apply with the employer directly. Their original posting is here: https://gdit.wd5.myworkdayjobs.com/en-US/External_Career_Site/job/USA-VA-Ashburn/Network-Security-Engineer-Senior_RQ230029-1

Apply on GDIT