Senior Proxmox Cluster Administrator

Required qualifications

• Minimum of 12+ years of experience and a Bachelors, 10+ years and a Masters, or 8+ years and a Ph.D. in Computer Science or related discipline. In lieu of a Bachelors degree, 4 additional years of experience is required for a total of 16 years.
• Senior, hands-on experience administering Linux infrastructure in production (RHEL/Ubuntu or similar)
• Production experience operating a virtualization platform at scale (Proxmox VE preferred)
• Automation proficiency using Ansible and scripting in Bash and/or Python
• Strong foundational knowledge in:
  • Cluster/HA concepts (quorum, failover, maintenance/rollback)
  • Virtualization performance troubleshooting (CPU/Memory/IO contention, capacity planning)
  • Networking (VLANs, bonding, segmentation)
  • Storage and data protection (ZFS and/or distributed storage, backup/restore operations)
• At least one active technical certification in: systems engineering, information security, networking, system administration, virtualization, IT systems management, or project management. (e.g., Security+, CISSP/CISM, CASP+, CCNA/CCNP, RHCSA/RHCE, VMware VCP, ITIL, PMP, etc.)
• US Citizenship with an active/current TS/SCI w/ Polygraph

• Deep Proxmox experience related to HA tuning, corosync troubleshooting, multi-cluster scaling, and lifecycle upgrades
• Advanced virtualization capabilities
• Familiarity with Dev Sec Ops /IaC best practices
• Experience with security/compliance operations in controlled environments (STIG/RMF/NIST-aligned practices) and vulnerability remediation workflows
• Experience with observability tooling (Prometheus/Grafana, ELK/Open Search, Splunk) and SLO-driven operations

Peraton Labs is seeking a poly cleared Senior Proxmox Cluster Administrator to own day-to-day operations and lifecycle management of a mission-critical Proxmox virtualized environment supporting a complex Multi-OS research infrastructure. You will work closely with Peraton team members, sub-contractors, as well as directly with our Maryland-based customer, in a fast-paced environment.

This role is hands-on and operationally focused, with responsibility for platform reliability, security posture, and automation maturity. Exceptional candidates for this role may also have additional experience in Linux Administration/Engineering and/or Automation/Dev Sec Ops  Engineering.

This position requires full-time on-site work at a customer site near College Park, MD.

Key responsibilities may include:

• Administer and sustain Proxmox VE clusters (quorum/corosync, HA policies, node health, upgrades, scaling, capacity forecasting)
• Standardize VM/LXC provisioning
• Lead incident response and complex troubleshooting across compute/network/storage
• Manage Proxmox host networking (Linux bridges, bonding, VLAN trunking, segmented management planes)
• Own backup/restore and DR readiness for virtualization workloads, including periodic restore validation
• Maintain platform documentation (runbooks, SOPs, diagrams, change records) and support audit-ready artifacts as required by the program
• Partner with Peraton internal, sub-contractors, and government support teams to onboard workloads safely and support continuous improvements
• Additional ability to provide support in one or more of the following:
  • Maintain secure and standardized Linux services and baselines supporting the enclave (hardening, platform services, lifecycle/patch coordination, reliability improvements)
  • Develop automation to reduce toil and drift (Ansible/Git-based workflows, provisioning/patch/validation pipelines, compliance evidence automation)