Senior Systems Administrator

Senior Systems Administrator | Caseyville, IL, United States | Hybrid | $92,300.00 - $166,850.00 We're hiring on behalf of a leading technology solutions provider serving government and commercial customers with innovative digital and mission solutions. This organization is known for its commitment to excellence and for tackling complex challenges in national security. They foster an environment where proactive leadership and deep technical expertise are valued, especially in mission-critical, classified environments. **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 DoD STIGs and agency policies. • Monitor and tune system performance, conduct root cause analysis, and resolve complex issues quickly and efficiently. • Support backup/recovery strategies, disaster recovery plans, and continuity of operations. • Oversee and maintain automation scripts and infrastructure as code (Ansible, PowerShell, Bash, etc.). **What You'll Need** • US citizenship required per contract. • Bachelor’s degree in Computer Science, Engineering, Information Technology, or related discipline and 8-12 years of prior relevant experience, or Master’s with 6-10 years of prior relevant experience. Additional years of experience in lieu of a degree are acceptable. • Active Top Secret security clearance 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. • Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server platform system administration. • Proficiency with virtualization platforms (VMware, KVM) and management tools. **What's On Offer** • Competitive compensation package ranging from $92,300.00 - $166,850.00 annually. • Comprehensive Health and Wellness programs. • Income Protection and Paid Leave benefits. • Retirement savings programs. • Opportunities for professional development and career advancement within a respected industry leader. Apply via Haystack today!