Systems Administrator, Senior- Red Hat Linux & Windows (Top Secret w/SCI eligibility)

American Systems•Washington, DC

18h•Onsite

About The Position

AMERICAN SYSTEMS, a 100% employee-owned federal contracting company, is seeking a Senior Systems Administrator with strong Red Hat Linux CLI and Windows administration experience to support a Special Access Program in Washington, DC. This role focuses on owning and optimizing enterprise Linux & Windows infrastructure across multiple datacenters, partnering with cybersecurity and engineering teams, and providing Tier III support for systems that cannot fail. Role includes a $5,000 sign-on bonus in addition to a generous compensation package!

Requirements

Active TOP SECRET clearance with SCI eligibility required; Program Access Request (PAR) submission required after hire.
Bachelor’s degree in a STEM discipline (or additional years of relevant experience considered in lieu of degree).
8-10 years of IT Systems Administration that includes 3-5 years of Linux CLI administration.
DoD 8140 IAT Level II cert (e.g., Security+ CE or equivalent).
Experience designing and maintaining secure, scalable cloud/on-prem platforms (IL5–IL6+).
Knowledge of STIGs, RMF, and DoW cybersecurity standards.
Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP.
Experience with virtualization (VMware).
Strong CLI and Bash scripting experience.
U.S. Citizenship Required for the purposes of obtaining/holding a U.S. security clearance.

Responsibilities

Support on-premises Linux (80%) and Windows (20%) infrastructure and applications.
Support on-premises vSphere infrastructure across multiple datacenters.
Provide Tier III support for production and development environments, managing ticket submission and tracking.
Monitor resource availability to meet customer requirements, ensuring sufficient hardware, software, and throughput.
Review and optimize system performance to ensure peak efficiency and reliability for mission-critical applications.
Analyze system resource usage and apply corrective actions when necessary.
Review system and application logs, ensuring completion of scheduled tasks and backups.
Create and manage user accounts, groups, and permissions; maintain local repositories in a RHEL-based environment.
Support on-prem and remote Linux-based Oracle database appliances.
Develop and maintain administrative bash scripts for system maintenance and automation.
Proficient in DNS administration.
Document and implement system administration solutions to meet business requirements.