Peraton is seeking a Linux Systems Administrator IV to join our team supporting a mission-critical Intelligence Community customer. In this role, you'll be at the heart of ensuring the reliability, performance, and security of enterprise-level systems that directly support national security operations. As a senior systems administrator, you will be responsible for maintaining high-availability environments, rapidly troubleshooting and resolving complex issues, and working hands-on with cutting-edge technologies. You'll partner closely with government customers, contractor leads, ISSOs, application vendors, and end users—making your impact both immediate and highly visible. This is an opportunity for a proactive professional who thrives in high-stakes environments and takes pride in delivering resilient, secure systems. If you have a passion for Linux, cloud, and security, and you're ready to make a difference, we want to hear from you.