Systems Administrator

Key Responsibilities

• Build, harden, configure, administer, and maintain Linux and Windows servers supporting electrical-distribution, water/wastewater, ADMS, and SCADA applications.
• Administer enterprise Linux platforms, including Ubuntu, RHEL, Rocky Linux, and CentOS, ensuring secure and reliable operation.
• Provision Linux and Windows systems on physical servers and Nutanix-hosted virtual machines.
• Administer SEL computing platforms hosting operational applications and SCADA services.
• Support Inductive Automation Ignition SCADA environments, including gateways, redundant gateways, databases, historians, alarms, logging, certificates, authentication, and communications.
• Support Rockwell Automation environments: FactoryTalk Services Platform, FactoryTalk View SE, PlantPAx, FactoryTalk Historian, licensing, domain-integrated services, SQL databases, and redundant architectures.
• Configure and maintain storage, filesystems, networking, host-based firewalls, service accounts, certificates, NTP, logging, database connections, dependencies, redundancy, and backup services.
• Conduct advanced Linux troubleshooting, including log analysis, performance tuning, system recovery, and root-cause analysis.
• Use Bash, PowerShell, Python, and SQL to automate provisioning, monitoring, backups, reporting, patching, configuration validation, and system-administration tasks.
• Administer relational databases such as SQL Server, PostgreSQL, and MySQL.
• Apply DISA STIGs to Windows and Linux systems while evaluating operational impact, vendor support, and SCADA uptime requirements.
• Document STIG findings, exceptions, mitigations, and compensating controls.
• Coincide with SCADA engineers, electrical/water specialists, application owners, cybersecurity staff, network engineers, and vendors to determine system requirements.
• Test patches, upgrades, and security changes in a testbed environment before production deployment.
• Perform backup testing, restoration validation, disaster recovery checks, and support incident response following failed updates.
• Maintain build guides, configuration baselines, security checklists, dependency diagrams, inventories, recovery procedures, backup documentation, and change records.
• Support safe, reliable operations through strong understanding of high availability, redundancy, safety, and continuous-operation needs for SCADA/industrial systems.

Basic Qualifications

• Bachelor’s Degree in Computer Science or IT related field or at least 3 years of experience administering Linux and Windows servers in FRCS/OT or critical-infrastructure environments.
• Experience supporting SCADA, ADMS, industrial-control, or critical-infrastructure applications.
• Advanced enterprise Linux experience (Ubuntu, RHEL, Rocky, CentOS).
• Experience supporting SEL platforms, Ignition, Rockwell FactoryTalk/PlantPAx, and Nutanix virtualization.
• Experience applying and documenting DISA STIG compliance.
• Experience with automation in Bash, PowerShell, Python, and SQL.
• Ability to obtain and maintain a Secret security clearance.
• Applicable DoD 8140 baseline certification.

Preferred Qualifications

• Experience with USMC IT and OT/FRCS Systems and cybersecurity processes.
• CompTIA Linux+, Red Hat Certified System Administrator (RHCSA), or Red Hat Certified Engineer (RHCE).
• Linux Foundation Certified System Administrator (LFCS), Linux Professional Institute Certification (LPIC).
• Nutanix Certified Professional – Multicloud Infrastructure, Microsoft Windows Server certification.
• Inductive Automation Ignition Core Certification, SQL Server or PostgreSQL professional training.
• SEL platform training, ICS-CERT cybersecurity training.