Senior Network Engineer

Location: Annapolis Junction

** Worker Type*
* Regular

** Job Description*
* ** Primary Responsibilities*
* ** Enterprise / Traditional Networking*
* + Design, implement, configure, and support enterprise network infrastructures, including routers, switches, firewalls, and security appliances.

+ Install, configure, and maintain Cisco routing and switching platforms (e.g., Cisco 7600, 6500, and 3750 series or equivalent).

+ Develop and translate network security requirements and policies into detailed device configurations.

+ Monitor, troubleshoot, diagnose, and resolve network performance, connectivity, and security issues.

+ Manage and support Cisco ASA firewalls, VPN technologies, intrusion detection and prevention systems (IDS/IPS), and network management tools.

+ Design and implement enterprise‑level / ISP‑grade backbone networks to support mission‑critical operations.

+ Understand and work with Cisco ACI concepts and operations, including fabric concepts and integration with existing network architectures.

+ Understand basic physical connectivity, including fiber and Ethernet standards, optics, cabling, and patching.

** Linux Networking & Systems*
* + Design, configure, and troubleshoot Linux-based networking (e.g., routing, bridging, VLANs, iptables/nftables, routing daemons, VPNs, firewalls) in production environments.

+ Configure and maintain Linux systems used as network infrastructure components (e.g., virtual routers, VPN concentrators, security gateways, monitoring platforms).

+ Utilize tools and technologies such as KVM, Ansible, Bash, Python, and related automation/orchestration frameworks to deploy and manage networked Linux systems.

+ Work effectively at the intersection of traditional Cisco-style networking and Linux system administration, with a particular focus on deep Linux networking rather than general-purpose system administration alone.

** Systems Engineering*
* + Design end‑to‑end systems that integrate Linux hosts, network equipment, and security components to meet defined operational and security requirements.

+ Develop high‑quality technical documentation, including architecture diagrams, network/system design documents, and implementation plans.

+ Translate mission and operational requirements into practical, implementable network and system architectures.

+ Contribute to system integration, test, and validation activities for complex networked solutions.

** Additional Responsibilities*
* + Lead and guide small technical teams in resolving complex network and infrastructure problems.

+ Provide technical direction for the operation, configuration, optimization, and maintenance of network devices and Linux-based systems.

+ Ensure network and system environments meet security, compliance, and operational requirements.

+ Support cellular/networked communications technologies as required by the mission.

+ Learn and adapt quickly to new systems and technologies under pressure, with minimal supervision.

+ Support occasional travel as required.

** Basic Qualifications*
* + Minimum of 15 years of experience in network engineering, including routing, switching, and network security in enterprise or mission‑critical environments.

+ Significant hands‑on experience with Cisco networking and security technologies (routing, switching, firewalls, VPNs, IDS/IPS).

+ Demonstrated, practical experience with Linux networking and Linux systems in an operational or production environment (beyond basic Linux system administration).

+

Experience with tools/technologies such as KVM, Ansible, Bash, Python, VPN, and firewall configuration.

+ Proven ability to design and document networked systems and architectures.

+ Demonstrated ability to lead technical efforts and resolve complex network and infrastructure issues.

+ Self‑starter capable of operating independently in small teams with limited ramp‑up time or mentoring resources.

+ Active TS/SCI security clearance with polygraph.

** Preferred Qualifications*
* + Prior CNO/TAO or similar offensive/defensive cyber operations experience.

+

Experience with Cisco ACI design/operations.

+

Experience with cellular and other non‑traditional communications technologies.

+ Experience supporting mission‑critical,…