Sr. Systems Engineer, Linux

Senior Linux Engineer

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The Senior Linux Engineer will report to the IT Manager, Cloud & Infrastructure and will be responsible for the reliability, security, performance, and lifecycle management of Linux-based systems and supporting infrastructure. This role will work closely with Information Security, Service Operations, and other IT teams to support production and internal environments. The ideal candidate is self-motivated, comfortable in a fast-paced environment, and experienced in diagnosing complex system-level issues.

• Install, configure, maintain, patch, and monitor Linux servers across multiple environments
• Manage OS lifecycle activities including upgrades, security hardening, patch compliance, and vulnerability remediation
• Administer core Linux services such as:
• DNS, DHCP, NTP
• SSH, SFTP
• systemd services
• cron / scheduled tasks
• log management (rsyslog, journald)
• Perform performance tuning and troubleshooting across CPU, memory, disk, file system, and network layers using standard Linux tooling (top/htop, iostat, vmstat, strace, lsof, tcpdump, etc.)
• Manage and maintain storage and file systems (LVM, RAID, ext4/xfs, mounts, quotas, and backups)
• Support server virtualization and/or cloud environments where applicable (Hyper-V, Azure, OCI, etc.)
• Participate in monitoring and alerting improvements (e.g., Zabbix, Prometheus, Grafana, Splunk, ELK, Nagios, etc.)
• Develop and maintain automation for provisioning, patching, and configuration management using scripting and tooling such as:
• Bash, Python, Power Shell
• Ansible, Puppet, or Chef
• Provide Tier 3 escalation support for internal infrastructure issues and service outages
• Work with third-party vendors and internal teams to coordinate problem resolution and root cause analysis
• Maintain accurate and timely ticket updates, documentation, and status reporting in the ticketing system
• Create and maintain internal documentation, standards, runbooks, and procedures
• Provide guidance and mentorship to Service Operations and other support personnel
• Participate in a rotating on-call schedule and respond to after-hours incidents as required
• Travel to other company sites as needed for infrastructure support or deployments
• Conduct themselves professionally when representing the team and organization
• Work collaboratively to achieve goals and/or complete assigned tasks
• Adhere to set directions and guidelines from team leader to support collaboration across teams to complete projects
• Perform other duties as assigned by management

• Typically requires bachelor's degree and/or equivalent level of experience with 8 years of hands-on experience in Linux Administration, Systems Administration, or Infrastructure Support in a company of 500+ employees (or equivalent combination of experience and education).
• Strong working experience of Linux administration concepts including:
• user/group management, permissions, sudo, SSH
• package management (yum/dnf/apt), repositories, patching
• system services (systemd), startup configuration
• log analysis and troubleshooting
• Solid understanding of networking fundamentals:
• TCP/IP, routing basics, DNS, firewalls
• troubleshooting connectivity using common tools (ping, trace route, netstat/ss, tcpdump)
• Experience supporting enterprise environments with uptime, security, and compliance expectations
• Ability to troubleshoot issues independently and drive resolution across multiple teams
• Strong analytical and problem-solving skills with excellent attention to detail
• Strong written communication skills, including documentation and ticket updates
• Self-starter with the ability to work with little or no supervision
• Strong time-management skills with the ability to multitask and manage priorities effectively
• Effective collaborator across IT and other departments
• Demonstrated commitment to professional development and continuous improvement
• Experience with configuration management
• Familiarity with security best practices:
• CIS hardening
• auditing/logging
• vulnerability scanning remediation
• Experience supporting:
• container platforms (Docker, Kubernetes)
• CI/CD pipelines
• cloud Linux workloads
• Experience with backup tooling and disaster recovery practices
• Scripting/automation background beyond "basic scripts," including reusable tooling, error handling, and version control (Git)
• Ability to communicate in a manner that is timely, respectful, and open to other ideas
• Demonstrate willingness to adjust thinking and behavior

• Must be able to work flexible hours outside of normal business hours
• Be part of on call rotation
• Must be able to sit or stand for extended periods
• Must be a "U.S. person" as defined by the ITAR (22 CFR §120.15)
• Must be able to stoop, bend, crawl, and being able to maneuver in tight spaces
• Ability to routinely lift 20-30 lbs. and…