Senior Systems Administrator

Senior Systems Administrator | Valley Park, MO, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring for a highly respected organization that plays a critical role in national security, providing advanced technology-enabled services and software capabilities to defense and intelligence customers. This company is known for its commitment to innovation and supporting its clients in a rapidly evolving security landscape. The Role • Lead system administration for Linux and Windows-based systems within secure, mission-critical environments. • Architect and manage complex server, storage, and virtualization infrastructure, including VMware and KVM. • Perform OS installation, configuration, hardening, and patching in compliance with strict security standards. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues efficiently. • Support backup/recovery strategies, disaster recovery plans, and continuity of operations. • Oversee and maintain automation scripts and infrastructure as code using tools like Ansible, PowerShell, and Bash. What You'll Need • US citizenship required per contract. • Bachelor’s degree in Computer Science, Engineering, Information Technology, or related discipline with 8-12 years of relevant experience (or equivalent experience in lieu of degree). • Active Top Secret clearance, with the ability to obtain TS/SCI with Polygraph. • DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). • Proven experience with Linux and Windows Server platform system administration. • Proficiency with virtualization platforms (VMware, KVM) and automation/scripting (Ansible, Bash, PowerShell, Python). What's On Offer • Opportunity to work on mission-critical systems supporting national security initiatives. • Collaborative environment with cybersecurity, network engineering, and software development teams. • Professional development and potential for growth within a leading technology organization. • Comprehensive benefits package including health, wellness, income protection, paid leave, and retirement. Apply via Haystack today!