Senior Systems Administrator

Senior Systems Administrator | Ballwin, MO, United States | Hybrid This employer is seeking a Senior Systems Administrator to join a dynamic team supporting mission-critical intelligence and geospatial initiatives. As a senior member of the IT operations contingent, the successful candidate will be instrumental in maintaining, securing, and enhancing high-performance systems in a classified environment. This role demands strong technical acumen, proactive leadership, and the ability to thrive in a fast-paced setting, ensuring the uninterrupted availability and security of vital infrastructure. The Role • Lead system administration for Linux and Windows-based systems in secure, mission-critical environments. • Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM). • Perform OS installation, configuration, hardening, and patching in compliance with security standards. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues. • Support backup/recovery strategies, disaster recovery plans, and continuity of operations. • Oversee and maintain automation scripts and infrastructure as code. 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 Master’s with 6-10 years. • Active Top Secret clearance required, with the ability to obtain TS/SCI with Polygraph. • DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP). • Experience with cloud platforms (AWS GovCloud, Azure Government) and hybrid cloud environments. • Proficiency with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server administration, and virtualization platforms (VMware, KVM). What's On Offer • Opportunity to work on mission-critical systems supporting national security. • A role that involves leading initiatives and mentoring junior administrators. • Collaborative environment working with cybersecurity, network engineering, and software development teams. • Continued professional development and exposure to advanced technologies. Apply via Haystack today!