Engineering System Administrator, Principal

Centrus Global•Oak Ridge, TN

18h

About The Position

Are you energized by solving complex engineering challenges that directly support national security, energy reliability, and scientific innovation? We’re looking for a Systems Engineer / Systems Architect who thrives in mission‑critical environments and is ready to take on a role where their work truly makes a difference. In this position, you’ll design, secure, and sustain the control systems and OT infrastructures that keep essential DOE and energy‑sector operations running—spanning nuclear facilities, accelerator systems, experimental platforms, and site‑wide operational technologies. You’ll work at the intersection of OT engineering, cybersecurity, facility operations, and research programs to deliver resilient, well‑architected systems aligned with NIST frameworks and DOE requirements. If you enjoy systems engineering with real‑world impact, this is a unique opportunity.

Requirements

5–10+ years as a Systems Engineer or Architect, including 3+ years supporting OT/ICS or critical infrastructure
Strong experience with Windows/Linux administration, virtualization (VMware, Hyper‑V, KVM), and storage systems
Background with SCADA/ICS architectures, HMIs, engineering workstations, and historians
Working knowledge of NIST cybersecurity frameworks
Hands‑on experience with configuration management, patching, imaging, and lifecycle processes
Experience supporting operational environments such as energy, nuclear, accelerator, national lab, or 24/7 mission systems
Ability to collaborate seamlessly across engineering, cybersecurity, operations, and research groups

Nice To Haves

Certifications: CISSP, Security+, GICSP, Microsoft/Linux engineering certs, VMware VCP, Red Hat, ISA/IEC 62443
Experience in secure or high‑hazard environments (nuclear, accelerator, etc.)
Familiarity with OT monitoring tools (Nozomi, Claroty, Dragos) and SIEM platforms
Background designing resilient architectures for scientific or experimental workloads
Experience with cyber assessments and configuration management processes

Responsibilities

Craft secure, resilient system architectures built for high‑consequence OT and industrial control environments, following industry-leading frameworks like NIST 800‑82, NIST 800‑53/171, and ISA/IEC 62443.
Define architectures that deliver deterministic performance, high availability, and fault tolerance, while maintaining rigorous configuration baselines, lifecycle documentation, and design records.
Engineer, deploy, and operate complex infrastructure across Windows/Linux servers, virtualization platforms, clustered systems, and enterprise storage.
Integrate OT and ICS environments with core services for authentication, monitoring, patching, and secure remote access.
Support SCADA/HMI servers, historians, and engineering workstations, ensuring reliable data movement between OT and enterprise/DMZ networks.
Develop inventories, diagrams, SOPs, and precise configuration documentation to sustain long-term system reliability.
Implement NIST-aligned security controls and DOE cybersecurity requirements across operational technology environments.
Support vulnerability management, patching programs, and secure baseline maintenance.
Participate in cyber and operational readiness assessments and integrate systems with enterprise monitoring, logging, and detection platforms.
Safeguard OT access by managing privileged workflows, vendor connectivity, and secure identity operations.
Drive safe and effective automation using PowerShell, Python, Ansible, and similar tooling.
Deploy and manage monitoring and observability platforms such as Splunk, Elastic/Grafana, SolarWinds, and Nozomi/Claroty.
Perform root‑cause analyses, support cyber and operational incident response, and continually refine system reliability and performance across mission‑critical operations.