Senior Network Administrator

Ennoble First Inc.; Gaithersburg (MD); On-site; USD 125,000 - 155,000; Full time

Job summary

Ennoble First is seeking a Senior Network Administrator to support the National Geospatial-Intelligence Agency (NGA) in Gaithersburg, Maryland. You will lead enterprise network design, security, and modernization across LAN/WAN/WLAN, collaborating with agile teams to deliver resilient infrastructure.

This role requires active TS/SCI clearance with polygraph eligibility, strong Cisco routing/switching expertise, and hands-on firewall/VPN experience, plus relevant certifications and security

Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or related field with 8+ years of experience.
• Active TS/SCI clearance with ability to complete a polygraph.
• 8+ years of network administration experience.
• Security+ and CCNA/CCNP or equivalent certification.
• Experience in large-scale, mission-critical networks.
• Strong Cisco routing/switching expertise.
• Solid understanding of TCP/IP, OSPF/BGP/EIGRP, VLANs, DNS/DHCP, VPN, NAT, QoS, Multicast.
• Experience with enterprise firewalls (Cisco ASA, Palo Alto, Fortinet).
• Experience with network monitoring tools and Agile/Scrum environments.

Responsibilities

• Design, configure, administer, and maintain enterprise LAN, WAN, WLAN, VPN, and data center networks.
• Install and support Cisco routers, switches, firewalls, load balancers, and other network gear.
• Collaborate with Agile Scrum teams for infrastructure enhancements and CI/CD support.
• Participate in sprint planning, backlog refinement, stand-ups, reviews, and retrospectives as networking SME.
• Monitor performance, capacity, and availability; identify optimization opportunities.
• Troubleshoot complex issues; perform root cause analysis and long-term fixes.
• Implement secure network architectures per Intelligence Community security requirements.
• Support cloud connectivity, hybrid networking, and modernization projects.
• Develop and maintain network documentation, diagrams, SOPs, and baselines.
• Coordinate hardware refreshes, maintenance windows, and patch management.
• Partner with cybersecurity teams to address vulnerabilities and support audits.

Skills

Network administration

Cisco routing

TCP/IP

VPN technologies

DNS/DHCP

Security+

CCNA/CCNP

Firewall management

Troubleshooting

Agile/Scrum

Education

Bachelor's degree in Computer Science

Tools

Cisco ASA

Palo Alto

Fortinet

Job description

Location: Gaithersburg, MD

Required Clearance: Active TS/SCI with Polygraph Eligibility

Employment Type: Full-Time Regular

Shift: Day

Travel: No

Relocation Assistance: Yes

Company Overview

We are Ennoble First. The people supporting and securing some of the most complex government, defense, and intelligence projects across the country. We ensure today is safe and tomorrow is smarter. Our work has meaning and impact on the world around us, but also on us, and that's important. Ennoble First is your place. You make it your own by embracing autonomy, seizing opportunity, and being trusted to deliver your best every day. We think. We act. We deliver. There is no challenge we can't turn into an opportunity.

Position Overview

Ennoble First is seeking a Senior Network Administrator to support the National Geospatial-Intelligence Agency (NGA) in Gaithersburg, Maryland. In this role, you will serve as a technical leader responsible for the administration, optimization, security, and modernization of enterprise network infrastructure supporting mission‑critical Intelligence Community operations.

Working within an Agile environment, you will collaborate with systems engineers, software developers, cybersecurity professionals, and cloud engineers to deliver secure, resilient, and high‑performing network solutions while supporting infrastructure modernization and continuous capability delivery.

Primary Responsibilities

• Design, configure, administer, and maintain complex enterprise LAN, WAN, WLAN, VPN, and data center network environments.
• Install, configure, and support Cisco routers, switches, firewalls, load balancers, and other network infrastructure components.
• Collaborate with Agile Scrum teams to deliver infrastructure enhancements supporting continuous integration and rapid capability delivery.
• Participate in sprint planning, backlog refinement, daily stand‑ups, sprint reviews, and retrospectives as the networking subject matter expert.
• Monitor network performance, capacity, and availability while proactively identifying opportunities for optimization.
• Troubleshoot complex network issues, perform root cause analysis, and implement long‑term corrective actions.
• Implement and maintain secure network architectures in accordance with Intelligence Community security requirements and best practices.
• Support cloud connectivity, hybrid networking, and infrastructure modernization initiatives.
• Develop and maintain network documentation, topology diagrams, standard operating procedures, and configuration baselines.
• Coordinate hardware refreshes, software upgrades, maintenance windows, and patch management activities.
• Partner with cybersecurity teams to address vulnerabilities, implement security controls, and support audits and accreditation activities.

Required Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or a related field and 8+ years of relevant professional experience. Additional years of relevant experience may be considered in lieu of a degree.
• Active TS/SCI clearance with the ability to successfully complete a polygraph examination.
• 8+ years of network administration experience.
• CompTIA Security+ and Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP), or equivalent certification.
• Experience supporting large‑scale, mission‑critical network environments.
• Strong expertise with Cisco routing and switching technologies.
• Thorough understanding of:
• TCP/IP
• OSPF, BGP, and EIGRP
• VLANs
• DNS/DHCP
• VPN technologies
• NAT
• QoS
• Multicast
• Experience administering enterprise firewalls such as Cisco ASA, Palo Alto, or Fortinet.
• Experience with network monitoring and performance management tools.
• Strong troubleshooting, analytical, and problem‑solving skills.
• Excellent communication skills and the ability to collaborate across technical disciplines.
• Experience working in Agile or Scrum environments.

Preferred Qualifications

• Cisco CCNP, CCIE, or equivalent certification.
• CompTIA Security+ CE (or DoD 8570/8140 compliant certification).
• Experience supporting Intelligence Community or Department of Defense customers.
• Experience with AWS, Azure, or hybrid cloud networking.
• Knowledge of Software Defined Networking (SDN).
• Experience with network automation using Python, Ansible, or PowerShell.
• Familiarity with Zero Trust Architecture and micro‑segmentation.
• Experience with DevSecOps and Infrastructure as Code (IaC).
• Experience with VMware NSX or Cisco ACI.
• ITIL Foundation certification.

Pay Range

$125,000–$155,000

The Ennoble First pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Equal Employment Opportunity

Ennoble First is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to any characteristic protected by law.

Ennoble First is committed to providing a diverse and inclusive work environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

E-Verify Participation

Ennoble First participates in E-Verify. Learn more at www.dhs.gov/E-Verify.

EEO is the Law | Pay Transparency Nondiscrimination

E-Verify is a registered trademark of the U.S. Department of Homeland Security. This business uses E-Verify in its hiring practices to achieve a lawful workforce.

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