Network Engineer (MSIC) with Security Clearance

COLSA Corporation is seeking a Network Engineer to support the Missile and Space Intelligence Center (MSIC) in Huntsville, AL. This position supports high-performance data center network architecture, deployment, and optimization, bridging traditional enterprise networking and specialized High-Performance Computing (HPC) environments. The role manages the physical and logical pathways that support low-latency fabrics, large-scale virtualization clusters, and high-density AI/ML and compute workloads. The Network Engineer is responsible for maintaining highly reliable, lossless network performance across multi-vendor leaf-spine topologies and high-throughput data pipelines.

• Fabric Architecture & SDN: Design, deploy, and maintain Cisco ACI environments, including Multi-Pod and Multi-Site configurations, across high-density routing and switching platforms.
• Low-Latency & HPC Connectivity: Engineer and tune InfiniBand and RoCEv2 fabrics to support ultra-low-latency requirements for data-intensive mission workloads.
• Protocol & Routing Management: Configure, audit, and troubleshoot complex BGP, OSPF, and EVPN overlay deployments across multi-vendor infrastructure, including Cisco Nexus, Arista, and NVIDIA/Mellanox.
• Lossless Performance Tuning: Optimize Quality of Service (QoS), Priority Flow Control (PFC), and Explicit Congestion Notification (ECN) to support lossless traffic flow and consistent network performance.
• Hypervisor & Storage Integration: Integrate network fabrics with virtualization platforms, including VMware NSX, KVM, and Nutanix, and high-speed storage networks such as NVMe-oF to support high-throughput East-West traffic.
• Capacity Planning & Automation: Analyze network telemetry to forecast bandwidth demands for large-scale data ingestion and leverage network automation tools, including Python and Ansible, to enforce configuration consistency and state control.
• Security & Compliance: Ensure network architectures adhere to DoD security baselines, DISA STIGs, and operational security standards required for classified processing environments. At COLSA, people are our most valuable resource and centered at our core value. We invite you to unite your talents with opportunity and be a part of our "Family of Professionals!" Learn about our employee-centric culture and benefits here: https://www.colsa.com/culture_benefits Required Experience Required Qualifications
• Bachelor's degree (or higher) in Network Engineering, Computer Science, or a related technical field, or equivalent experience.
• Minimum of 2-5 years of related experience; position may be filled at varying levels based on experience.
• Direct experience with Arista routers, switches, and Cloud Vision.
• Direct experience migating networks between major manufacturers while minimizing disruption and down time with a specific focus on migration Arista.
• Experience with enterprise and/or data center networking environments.
• Proficiency with high-density switching platforms such as Cisco Nexus, Arista, or NVIDIA.
• Active/current CompTIA Security+ CE, ISC2 SSCP, or equivalent baseline certification.
• Ability to obtain Special Access Program (SAP) eligibility and maintain program access as required.
• U.S. Citizenship required. Must possess, or be able to obtain and maintain, a DoD Top Secret clearance with SCI eligibility, including successful completion of a Counterintelligence (CI) Polygraph within 180 days of the start date.

Preferred Qualifications

• Data Center Architecture: Experience with spine-leaf data center architectures.
• Security Clearance: Active DoD Top Secret clearance with SCI eligibility and a Counterintelligence (CI) Polygraph, with the ability to meet Special Access Program (SAP) eligibility requirements.
• Certifications: CCNA or higher and/or relevant NVIDIA networking certifications.
• HPC Experience: Demonstrated experience with High-Performance Computing (HPC) clusters.
• Storage Networking: Knowledge of NVMe over Fabrics (NVMe-oF) and Fibre Channel over Ethernet (FCoE).
• Automation: Ability to manage network state using Ansible, Terraform, or Python.
• Advanced RoCE: Direct experience implementing RoCEv2 in a lossless Ethernet environment using Data Center Bridging (DCB) and Priority Flow Control (PFC).
• Virtualization Experience: Experience with Nutanix, KVM, Citrix, or similar platforms. Applicant selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. COLSA Corporation is an

Equal Opportunity Employer, Minorities/Females/Veterans/Disabled. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.