Senior Linux System Administrator

Senior Linux System AdministratorEdgewater Federal Solutions is seeking a Senior Linux System Administrator to support a major national laboratory.ResponsibilitiesMonitor, maintain, and repair physical and virtual server systems.Resolve technical issues affecting hardware, operating systems, or applications.Apply operating system or application patches, install or replace hardware, and implement configuration changes to improve or restore system performance.Perform system capacity analysis and planning.Assist users in accessing and using business systems.Develop instructions and procedures for system maintenance, create scripts to automate monitoring and repair tasks, and conduct quality assurance checks.Collaborate with customers, subject matter experts, and architects to analyze, evaluate, and optimize systems.Contribute to process development and system improvement effortsQualificationsBachelor's degree in relevant discipline and a minimum of 4 years of directly related experience that demonstrates the knowledge, skills, and ability to perform the duties.Related experience may be substituted for relevant education and vice versa.Ability to obtain & maintain a U.S. Dept. of Energy ClearanceU.S. Citizenship is required.Required Skills:Proficient with major distributions (e.g., Red Hat, CentOS, Ubuntu).Managing users, groups, permissions, and file systems.Shell Scripting-Writing and debugging Bash or other shell scripts for automation.Package Management-Using tools like yum, apt, rpm, dpkg for installing and updating software.Networking-Configuring network interfaces, firewalls (iptables, firewalld), DNS, routing, and troubleshooting connectivity issues.System Monitoring and Performance Tuning-Using tools like top, htop, vmstat, iostat, sar, and monitoring solutions (Nagios, Prometheus).Storage Management-Managing disks, partitions, LVM, RAID, NFS, and mounting file systems.Security-Implementing SELinux/AppArmor, SSH hardening, user authentication, and basic vulnerability assessment.Backup and Recovery-Familiarity with backup tools and disaster recovery planning.Configuration Management-Experience with tools like Ansible, Puppet, or Chef for automated deployments.Virtualization and Containers-Working knowledge of KVM, VMware, Docker, and Kubernetes basics.Log Management-Using syslog, journald, and log analysis tools.Troubleshooting-Diagnosing and resolving system and application issues efficiently.Analytical thinking to diagnose complex issues.Clear documentation and ability to explain technical concepts to non-technical stakeholders.Working effectively within cross-functional teams.Prioritizing tasks and managing multiple responsibilities.Willingness to learn new technologies and adapt to changing environments.Edgewater Federal Solutions is a privately held government contracting firm located in Frederick, MD. The company was founded in 2002 with the vision of being highly recognized and admired for supporting customer missions through employee empowerment, exceptional services and timely delivery. Edgewater Federal Solutions is ISO 9001, 20000-1, 270001 certified, appraised at CMMI Level 3 Maturity for Development and Services, and has been named in the Top Workplaces in the Greater Washington Area Small Companies for 2018 through 2025.It has been and continues to be the policy of Edgewater Federal Solutions to provide equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, marital status, veteran status, and/or other statuses protected by applicable law.