Cloud Systems Administrator

Description

Mantis Security is a leading specialty firm of high‑caliber talent who specialize in Cyber Operations, Cyber Defense, Information Assurance, Software Development, Dev Sec Ops , Security Engineering, and Cloud Engineering. We enable and protect our nation's most important IT assets and invest in the long‑term career development of every employee! We are currently looking for the next Cloud Systems Administrator to join our team of experts!

Seeking an experienced Cloud Systems Administrator to join our team supporting the U.S. Intelligence Community. Your efforts will ensure robust, reliable intelligence collection and dissemination, supporting defense intelligence, combatant commands, partner nations, and federal agencies.

• Ensure optimal operation of multi‑user computer systems, collaborating with network engineers and software developers.
• Manage system resources to enhance CPU and disk efficiency and responsiveness.
• Administer system security, setting up user accounts and profiles, and ensuring compliance with the latest standards.
• Provide comprehensive support, from Tier 1 troubleshooting to Tier 2 problem resolution.
• Optimize system performance, oversee software installations, and manage storage solutions.
• Evaluate new technologies and make recommendations on hardware and software acquisitions.
• Ensure rigorous application of security settings and conduct regular security assessments.
• Manage Unix and Linux environments and be familiar with their configuration.
• Proficient in scripting and setting up systems from scratch, including application installations.
• Knowledgeable in security protocols, able to resolve vulnerabilities and run Security Technical Implementation Guides (STIGs).

• Must work in an SCIF; hours are flexible but must be available during core business hours and occasionally after hours, weekends, or mandatory obligations.
• Bachelor’s degree in an applicable field with 8+ years of experience, or Master’s with 6+ years, or 4+ years of experience in lieu of a degree.
• Active TS/SCI or SCI eligibility with mandatory polygraph (must self‑obtain).
• Valid Security+ or equivalent IAT II/III level certification (DoD 8570 compliance).
• Strong Linux experience (CentOS, RHEL, Oracle, etc.). Must stay current.
• Experience in AWS environments; must provision, maintain, monitor servers via console access.
• Must perform snapshots, backups, disaster recovery, performance tuning, installation, STIG hardening, and patching.
• Excellent troubleshooting skills (including scripting, audit log review) and Tier 1 communication competencies.

• Experience developing and maintaining critical documentation: SIPs, SAGs, SUMs, SOPs, Getting Started guides.
• Experience with Elastic Search.
• Current polygraph.
• Familiarity with Cloud (EC2, S3, Elasticache), Kafka, Openshift, Docker, Keycloak, Wildfly.
• PKI certificates, SSL, service accounts.
• Experience maintaining multiple environment types (physical, virtual, cloud).
• Experience supporting security audits and testing events.
• Experience upgrading from CentOS to RHEL 8 is a nice to have, but not mandatory if strong Linux experience exists.