Systems Administrator

Systems EngineerMarathon TS is seeking an experienced Systems Administrator to support the design, implementation, security, and maintenance of enterprise infrastructure and industrial control system (OT/ICS) environments.

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Responsibilities:Design, configure, maintain, and troubleshoot Windows and virtualized computing environments.Support VMware vSphere/ESXi or Microsoft Hyper-V, Windows Server, Active Directory, and network services.Manage system backups, storage, recovery, and disaster recovery procedures.Implement security configurations, system patching, vulnerability remediation, and compliance requirements.Support network infrastructure, including TCP/IP, VLANs, firewalls, and network segmentation.Develop and maintain technical documentation, system diagrams, test procedures, and operational procedures.Coordinate with technical teams and stakeholders to support system deployments, upgrades, testing, and commissioning.Provide technical guidance and help resolve complex infrastructure issues.
Requirements:Bachelor's degree with 5+ years of relevant experience, associate's degree with 8+ years, or high school diploma/GED with 10+ years.Experience in systems administration or systems engineering, preferably supporting enterprise or OT/ICS environments.Hands-on experience with virtualization, Windows Server, networking, backups, and system recovery.Knowledge of cybersecurity compliance, security hardening, STIGs, vulnerability management, and system patching.Familiarity with industrial control system networking and security concepts.Strong troubleshooting, documentation, communication, and technical leadership skills.Active CompTIA Security+ certification or an approved higher-level certification, such as CASP+ or CISSP.Ability to support on-site activities and flexible schedules as required.
Preferred Qualifications:Experience with OT/ICS cybersecurity, SCADA, ACAS/Tenable, RMF, or NIST security frameworks.Familiarity with enterprise backup and storage platforms, endpoint security tools, centralized logging, PowerShell, and virtual desktop infrastructure. xzbcwsv Experience supporting secure or isolated computing environments.