Junior Linux System Administrator

Sierra Experts is seeking a motivated Junior Linux System Administrator to help support, maintain, and improve our internal infrastructure—primarily Ubuntu 24.04 LTS servers in virtualized environments. This is an excellent entry-level or early-career opportunity for someone passionate about Linux who wants to grow into a full sysadmin/DevOps role.You’ll work closely with experienced team members to monitor systems, handle routine tasks, troubleshoot issues, and contribute to automation and reliability improvements. We value eagerness to learn, strong problem-solving, and a proactive attitude over extensive prior experience.Responsibilities:The job responsibilities include but are not limited to the following (in no special order):Assist in monitoring, maintaining, and troubleshooting Ubuntu 24.04 LTS servers to ensure reliability and performance for internal usePerform routine system tasks such as patching/updates, user account management, backups, and log reviewsHelp install, configure, and support common internal services (e.g., Nginx, Apache, PostgreSQL/MariaDB, file shares, basic DNS)Support basic networking and security tasks (firewall rules with nftables/iptables, basic access controls, security patching)Participate in container basics (Docker/Podman) under guidance, including running and monitoring containersContribute to simple automation scripts (Bash or Python) and configuration management (Ansible preferred) with supervisionAssist with monitoring tools (e.g., setting up alerts in Prometheus/Grafana or similar) and reportingDocument procedures, configurations, and issue resolutions to build team knowledgeParticipate in on-call rotation (with senior support) and help resolve incidentsLearn and apply best practices for Ubuntu Server, virtualization, and internal infrastructureOther support duties as assigned to keep internal systems running smoothlyQualifications:Basic to intermediate hands-on experience with Linux (Ubuntu/Debian preferred; can come from personal projects, homelab, internships, help desk, or entry-level IT roles)Familiarity with Ubuntu Server fundamentals (command line, package management with apt, file permissions, processes/services via systemd)Comfort with Linux scripting basics (Bash required; Python a plus)Understanding of core services (web servers like Nginx/Apache, databases like PostgreSQL/MySQL, SSH, basic networking)Willingness to learn configuration management (Ansible strongly preferred) and containers (Docker/Podman)Basic knowledge of virtualization (e.g., VirtualBox, KVM, or cloud VMs) and networking concepts (TCP/IP, firewalls)Strong problem-solving skills, attention to detail, and eagerness to learn new tools/technologiesExcellent communication and teamwork— you’ll collaborate daily with the teamUS citizenship requiredCapability to obtain US security clearance (if needed for certain projects)Local candidates in/near Pittsburgh area only (hybrid flexibility possible after onboarding)Preferred Skills (not required):CompTIA Linux+, RHCSA, or similar certification (or working toward one)Experience with monitoring/alerting tools (Prometheus, Grafana, Zabbix)Exposure to Ansible, Git, or basic infrastructure-as-code conceptsAny prior help desk, IT support, or junior sysadmin experienceHomelab or personal projects running Ubuntu 24.04 (mention these in your application!)Education:Associate’s or Bachelor’s degree in Computer Science, IT, or related field (or equivalent self-taught experience/projects)Recent graduates or those with relevant certifications encouraged to applyCompensation and Benefits:• Competitive salary based on experience and qualifications• Lucrative commission/bonus structure based on performance• Health, Vision and Dental Benefits• PTO, paid holidays• Excellent opportunity for advancementPlease submit your resume with full work/education history (include any Linux-related projects, homelabs, or certifications). In your cover letter, tell us why you’re excited about Linux/Ubuntu and what you’ve built or troubleshot on your own.