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Network Engineer - Senior

Fantom CorporationEngineering & Development
Salary
$100K–$144.3K
Hiring from
United States
Work type
Hybrid
Posted

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Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth.
Must possess an active Top Secret Clearance
Must be willing and able to obtain a polygraph

Education: Bachelor’s degree required
Experience: Minimum of 8 years of relevant experience

Position Summary

We are seeking a Network Infrastructure SME to lead the design, implementation, and optimization of resilient, secure network infrastructure supporting mission-critical operations. This role provides strategic and technical leadership in network modernization, security architecture, and performance optimization across complex, multi-enclave environments.

The SME works closely with security, architecture, and operations teams to deliver reliable communications, implement zero-trust principles, and maintain secure connectivity. The position also supports virtualization, hyperconverged infrastructure, storage, monitoring, and identity services that underpin enterprise network operations.

Responsibilities

  • Design and implement enterprise network architectures that support secure, mission-critical operations.

  • Lead zero-trust network design and secure cross-enclave interoperability initiatives.

  • Configure and maintain routing, switching, firewalls, VPNs, tunneling, and access controls.

  • Optimize network performance, availability, reliability, and security across multiple enclaves.

  • Establish and maintain network security architecture standards, technical documentation, and governance processes.

  • Lead network modernization efforts aligned with enterprise strategy and zero-trust principles.

  • Support secure communications and connectivity across classified and highly regulated environments.

  • Provide technical leadership for infrastructure planning, implementation, integration, and troubleshooting.

  • Configure and maintain virtual networking and hyperconverged infrastructure environments.

  • Support enterprise storage systems and secure file transport services.

  • Implement network-based and host-based monitoring, alerting, and vulnerability scanning.

  • Integrate identity and access management services with infrastructure access controls.

  • Partner with security, architecture, and operations teams to resolve complex issues and maintain resilient systems.

    • Required Qualifications

  • Must possess an active Top Secret Clearance
  • Must be willing and able to obtain a polygraph
  • Minimum of 8 years of relevant experience in network engineering, infrastructure engineering, network security, or related technical disciplines.

  • Extensive experience designing, implementing, and supporting enterprise network environments.

  • Strong expertise in routing, switching, firewalls, VPNs, network security, and access control technologies.

  • Experience implementing zero-trust architectures and secure communications solutions.

  • Advanced troubleshooting and network performance analysis skills.

  • Experience supporting mission-critical, highly secure, or regulated environments.

  • Experience integrating networking with virtualization, storage, monitoring, and identity services.

  • Strong technical leadership, communication, collaboration, and documentation skills.

    • Technical Requirements

    Networking

  • Cisco switching, routing, firewalling, and site-to-site connectivity, including IPsec, DMVPN, and SD-WAN.

  • Arista switching.

  • Tunneling and VPN technologies, including GRE, IPsec, SSH, SSL VPN, OpenVPN, and WireGuard.

  • Advanced networking for specialized, multi-tiered applications.

  • Virtual and distributed switching across VMware, Proxmox, and Nutanix environments.

  • Client-server and site-to-site VPN solutions.

  • Integration and troubleshooting of diverse vendor platforms and equipment.

    • Virtualization and Hyperconverged Infrastructure

  • VMware/Broadcom technologies, including ESXi, vSphere, vCenter, vSAN, VxRail, cluster management, and licensing.

  • Proxmox host and cluster configuration, management, networking, and Ceph administration.

  • Nutanix host and cluster configuration, Prism Central management, and Nutanix Distributed File System (NDFS) administration.

    • Large-Scale Data Storage

  • QNAP, Synology, TrueNAS, and NetApp platforms.

  • File sharing and transport technologies, including Samba, SSH, SFTP, and NFS.

    • Monitoring and Security

  • Network-based and host-based data collection and monitoring.

  • Internal and external alerting, including SMTP configuration.

  • Active vulnerability scanning using tools such as Nessus.

  • Familiarity with Splunk for security information and event management (SIEM).

    • System Administration and Identity Management

  • Linux administration, including Rocky Linux, Red Hat Enterprise Linux, Amazon Linux, and Ubuntu.

  • Windows and macOS administration.

  • IPA/FreeIPA, LDAP/OpenLDAP, and Keycloak.

  • Linux access controls using SSSD and host-based access control (HBAC).

    • Supporting Applications and Platforms

  • Splunk, Nginx, Confluence, Jira, Docker, Kubernetes, GitLab, and Jupyter.

    • Preferred Qualifications

  • Master’s degree in Information Technology, Network Engineering, Cybersecurity, or a related field.

  • Experience supporting federal, defense, intelligence, or classified network environments.

  • Expertise in multi-enclave or cross-domain network architectures.

  • Experience with cloud networking, software-defined networking (SDN), and hybrid cloud environments.

  • Knowledge of security accreditation processes and compliance frameworks.

  • Relevant certifications such as CCNP, CCIE, CISSP, JNCIP, JNCIE, AWS Certified Advanced Networking, or equivalent credentials.

    • #CJ
    Fantom Corp is a Software Development, Agile Cloud, Software Development, Cyber Security (Risk Management, Assessments & Authorization (A&A)), Data, AI Platform (Computer Vision Models), Podcasting Media Services, and IT Services provider. Established in 2015, Fantom Corp serves Federal customers with top-notch Cybersecurity Architects, Data Scientists/Analysts, Software Engineers/Developers, DevSecOps Engineers, Project Managers, Identity, Credential Access Management (ICAM) services , and Cloud-certified practitioners. We excel in delivering emerging technologies such as Artificial Intelligence (AI) and Machine Learning (ML) with a focus on identifying trends, object detection, and classification of structured and unstructured data. Fantom Corp possesses mastery in all aspects of digital audio production. We lead in the ideation and creation of efforts for clients who want to harness the power of podcasting. We guide them in selecting the right show format for their needs and goals. As a Small Business, we possess the innovation, speed and flexibility to meet your requirements.
    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.

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