Networking Security Engineer (R-00236)

True Zero Technologies LLC.; Ashburn (VA); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Competitive salary

Best medical coverage

3 weeks PTO + 11 holidays

401k match

Cell phone/home internet reimbursement

Paternity/Maternity Leave

Training and certifications

Job summary

True Zero Technologies LLC. is seeking a Senior Network Security Engineer in Ashburn, VA, to lead complex security architecture, engineering, and tool sustainment for government-grade networks.

You will review firewall designs, oversee security controls, and guide technology choices to ensure least privilege and robust protection across LAN, WAN, and cloud environments. The role emphasizes hands-on configuration of security devices, SIEM integrations, and ongoing investigations.

Qualifications

• Minimum 7 years of relevant network security, network engineering, cybersecurity engineering, or security-tool administration experience.
• Advanced experience with LAN and WAN security, cloud networking, firewall architecture, IDS/IPS, SIEM integrations, CDM tools, network sensors, and security investigations.
• PWS minimum certifications: CompTIA Security+ and Network+; Cisco CCST Networking or Cybersecurity or CCENT; Palo Alto PCCSA; Juniper JNCIA-Junos; and AWS Cloud Practitioner.
• Preferred certifications include Cisco CCNA or CCNP and AWS Advanced Networking Specialty.
• Demonstrated ability to lead architecture reviews, alternatives analyses, trade studies, root-cause investigations, technology insertion recommendations, policy development, and technical reporting.

Responsibilities

• Lead reviews of network security architectures, designs, firewall requests, trust-zone transfers, and security controls for least privilege and policy compliance.
• Lead development and maintenance of LAN, WAN, cloud-network, SD-WAN, and ACI security standards, diagrams, designs, and transition documentation.
• Administer, configure, tune, secure, and sustain network security tools, devices, sensors, IDS/IPS, SIEM feeds, firewalls, proxies, and CDM capabilities.
• Support security investigations, incident containment and recovery, troubleshooting, and root-cause analysis for network-related issues.
• Identify network security and performance gaps, recommend corrective action, and conduct alternatives analyses, trade studies, and technology evaluations.
• Develop network security policies, awareness materials, training, signature-management records, maintenance reports, and performance reports.

Skills

Network security

Security architecture

Leadership

Tools

CDM tools

IDS/IPS

Firewalls

Cloud networking

Job description

True Zero Technologies, a veteran-owned small business, was founded on the principle that the purposeful enablement of people and technology in an organization directly ties to the quality of its outcomes. True Zero recognizes that those outcomes begin and end with our people, and that is what we have built a community of like-minded, driven, and passionate individuals and innovators who are aligned in a common goal of delivering top-tier services to our customers. Our culture and commitment have been recognized through numerous accolades, including being named one of the Best Places to Work in 2023 in two categories (“Prosperous and Thriving” ($5MM–$50MM in gross revenue) and “Mid-Atlantic Region” (DC, DE, MD, NC, VA, WV)), and again in 2025 as a Best Places to Work honoree. In addition, True Zero earned coveted spots on the Inc. 5000 list of fastest-growing companies in America in 2022, 2023, and 2025 , a testament to our sustained growth driven by our people-first approach and unwavering dedication to excellence.

The Network Security Engineer Senior leads complex network security architecture, engineering, tool sustainment, and analysis for CBP. The engineer provides senior review of network and firewall designs, directs resolution of security and performance issues, and develops technology recommendations for Government leadership.

Job Responsibilities

• Lead reviews of network security architectures, designs, firewall requests, trust-zone transfers, and security controls for least privilege and policy compliance.
• Lead development and maintenance of LAN, WAN, cloud-network, SD-WAN, and ACI security standards, diagrams, designs, and transition documentation.
• Administer, configure, tune, secure, and sustain network security tools, devices, sensors, IDS/IPS, SIEM feeds, firewalls, proxies, and CDM capabilities.
• Support security investigations, incident containment and recovery, troubleshooting, and root-cause analysis for network-related issues.
• Identify network security and performance gaps, recommend corrective action, and conduct alternatives analyses, trade studies, and technology evaluations.
• Develop network security policies, awareness materials, training, signature-management records, maintenance reports, and performance reports.

Job Qualifications

• Minimum 7 years of relevant network security, network engineering, cybersecurity engineering, or security-tool administration experience.
• Advanced experience with LAN and WAN security, cloud networking, firewall architecture, IDS and IPS, SIEM integrations, CDM tools, network sensors, and security investigations.
• PWS minimum certifications: CompTIA Security+ and Network+; Cisco CCST Networking or Cybersecurity or CCENT; Palo Alto PCCSA; Juniper JNCIA-Junos; and AWS Cloud Practitioner. Active higher-level certifications may support a waiver.
• Preferred certifications include Cisco CCNA or CCNP and AWS Advanced Networking Specialty.
• Demonstrated ability to lead architecture reviews, alternatives analyses, trade studies, root-cause investigations, technology insertion recommendations, policy development, and technical reporting.

We’re Actively Searching For Talented Security And Technology Practitioners Who Are Ready To Experience The True Zero Difference. As a True Zero Team Member, You'll Enjoy

• Competitive salary, paid twice per month
• Best in class medical coverage
• 100% of medical premiums covered by True Zero
• Company wide new business incentive programs
• Contribution Incentives (i.e. white papers, blog posts, internal webinars, etc.)
• 3 weeks of PTO starting + 11 Paid Holidays Annually
• 401k Program with 100% company match on the first 4%
• Monthly reimbursement of Cell Phone and Home Internet costs
• Paternity/Maternity Leave
• Investment in training and certifications to broaden and deepen your technical skills

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.