Currently, **ManTech** is seeking a motivated, career and customer-oriented **Linux Administrator** to join our team! This is a remote, technical position with an Agile Scrum team that will require a broad scope of skills and knowledge of DoD systems. **Responsibilities include but are not limited to:** + Application Troubleshooting Skills: Troubleshoot and resolve issues with applications/servers, in a complex, ever-changing environment, without requiring a step-by-step guide. Handle intense, high-stress, highly visible projects, mostly alone, without needing constant guidance. Get to the root cause, understand the problem and the environment, determine and present options for a permanent fix, get buy-in from relevant parties, and implement. + System Administration: Perform system setup, configuration, and routine maintenance tasks on various Linux distributions, including user account management, software installation, and system updates. + Automation and Scripting: Develop and maintain shell scripts and automation tools to streamline system management and administrative tasks. + Security and Compliance: Implement and maintain security best practices, including firewalls, access controls, and vulnerability assessments. Ensure compliance with industry standards and regulations. + Network Management: Configure and troubleshoot network services, TCP/IP, DNS, DHCP, and routing. Collaborate with network engineers to optimize network performance. + Monitoring and Troubleshooting: Set up and manage monitoring tools and respond to alerts promptly. Troubleshoot system issues and perform root cause analysis. + Backup and Recovery: Establish and maintain backup and disaster recovery solutions. Test and refine recovery procedures regularly. + Software Management: Manage software packages and dependencies using package management systems. Ensure software is up to date and secure. + Performance Optimization: Fine-tune system performance through kernel optimization, resource monitoring, and load balancing. + Documentation: Maintain accurate and up-to-date documentation of system configurations, processes, and procedures. + Collaboration: Collaborate with cross-functional teams and IT professionals to resolve technical issues and contribute to IT projects and initiatives. **Minimum Qualifications:** + 7+ years of relevant work experience as a Linux Systems Administrator, with proficiency in managing various Linux distributions. A Bachelor’s degree can be substituted for 4 years of experience. + Experience building and configuring servers, mostly from the command line (not reliant on a GUI). + Strong scripting skills (Bash, Python, or similar) for automation and task simplification. + Experience with Kubernetes/Rancher, or willingness to quickly learn a lot about it. + Some knowledge of Linux security best practices and experience in hardening systems. + Familiarity with network protocols, routing, and firewall configuration. + Ability to also function in a Windows environment. + Strong application troubleshooting skills and experience. + Demonstrated ability to troubleshoot and resolve new and confusing issues with our applications and servers, in a complex, ever-changing Linux-based environment, without requiring a step-by-step guide. + Demonstrated ability to handle intense, high-stress, highly visible projects, mostly alone, without needing constant guidance. + Demonstrated ability to get to the root cause, understand the problem and the environment, determine and present options for a permanent fix, get buy-in from relevant parties, and implement. + Communication skills (both written and verbal) and customer service skills. + Ability to work as part of a team, accept direction and correction. + Ability to work with senior/executive level staff, external partners, and government contacts. + Must have a CompTIA Security+ certification, and OS cert prior to start. **Preferred Qualifications:** + Experience working in an application troubleshooting role, or IT sustainment role (particularly in support of a government contract, or a live Production environment). + Familiarity with: Bash scripting, Ansible, JBoss, SQL, AppDynamics, GitLab pipelines, and/or Java programming. + Deep expertise in any other Linux-related area. + Bachelor’s degree in computer science, Information Technology, or related field. **Clearance Requirements:** + Must be U.S. citizen. + Candidate must have an active Secret clearance. **Physical Requirements:** + Remote work – work from your home office. + Sedentary work that primarily involves sitting/standing/walking/talking, must be able to remain in a stationary position 50%. + Occasionally move about inside the office to access file cabinets, office machinery, etc. + Frequently communicate with co-workers, management, and customers. + Lift and move hardware weighing up to 50 pounds. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.