Systems Engineer 3 - Linux/VMware & Enterprise Storage

NineFX is seeking a Systems Engineer Level 3 to support advanced systems engineering activities across Linux/Unix, Windows Server, VMware ESXi, Dell/HP server hardware, and NetApp storage environments in mission-critical government settings. The SE3 leads engineering design, integration, test planning, lifecycle management, and secure configuration across complex multi-platform infrastructures. This role integrates hands-on system administration with formal DoD systems engineering-including requirements analysis, architecture development (DoDAF/SOA), interface definition, CCB support, risk assessments, and modeling/simulation.

What You’ll Be Doing

Linux/Unix, Windows & Virtualization Engineering

• Engineer, configure, secure, and maintain RHEL7+, Windows Server 2012+, and VMware ESXi environments
• Manage kernels, OS installs, package configurations, system tuning, monitoring, and troubleshooting
• Support Active Directory with Centrify integration; create/assign Linux identities and groups
• Perform server hardware upgrades (Dell, HP, custom) including memory, disk, swap, and chassis maintenance
• Execute NetApp storage migrations from legacy platforms to modern solutions

Security, Hardening & Vulnerability Management

• Install and manage McAfee/Trellix and Nessus agents
• Conduct vulnerability scanning and compliance activities (IAVA/CVE)
• Patch and harden systems using Red Hat Satellite, WSUS, and approved STIG-aligned scripts

Systems Engineering & Architecture Development

• Analyze system requirements, architectures, and CONOPS; refine functional and system specifications
• Create system architectures using DoDAF and SOA approaches
• Develop interface definitions, design solutions, and operational concepts
• Coordinate CCB actions, technical reviews, and multi-discipline engineering issue resolution

Integration, Verification & Lifecycle Support

• Support design, development, integration, verification planning, and engineering documentation
• Define verification methods, evaluation criteria, and support certification/accreditation activities
• Conduct trade studies, modeling/simulation, and system performance analysis
• Maintain lifecycle technical baselines, configuration control, and compliance with national/agency standards

Technical Direction & Mission Engineering

• Provide senior-level technical direction across hardware/software development, interface controls, and end-to-end flow analysis
• Develop operational scenarios and design alternatives considering performance, resiliency, and cost
• Participate in integration activities and ensure accurate interface control documentation
• Support JCIDS documentation and all DoD-required systems engineering processes

• Active TS/SCI with Full Scope Polygraph (must already be held - no sponsorship)
• 20+ years Systems Engineering experience supporting complex DoD/IC programs
• Bachelor’s degree in Systems Engineering, CS, IS, Engineering Management, or related field
• Five additional years may substitute for the degree
• IAT Level II (Security+ CE, GSEC, CySA+, CCNA Security, or GICSP)
• Deep expertise with Linux/Unix system engineering in virtual and physical infrastructures
• Strong background with Windows Server, VMware ESXi, Dell/HP server hardware, NetApp storage
• Proven experience producing system architectures, requirements documents, ICDs, SEPs, and engineering plans
• Extensive experience supporting integration, testing, verification planning, and lifecycle engineering
• Hands-on proficiency with risk assessments, trade studies, modeling/simulation, and configuration management