Linux Administrator

• Install, configure, and maintain Linux servers and their components to ensure optimal performance, security, and availability.
• Conduct regular system monitoring to verify the integrity and availability of all hardware, server resources, systems, and key processes.
• Administer Linux-based services, including Apache, NGINX, MySQL, and PostgreSQL. Implement and oversee backup and recovery solutions.
• Regularly apply OS patches/upgrades and update administrative tools and utilities.
• Carry out system upgrades and configurations as required.
• Monitor and evaluate system performance, providing statistics and reports.
• Keep operational, configuration, or other procedures up to date.
• Execute regular file archival and purging as needed.
• Manage and verify the effectiveness of security solutions, such as firewalls, anti-virus solutions, and intrusion detection systems.
• Develop and maintain installation and configuration procedures
• Collaborate with network engineering, business application, and database administration teams to ensure the availability, reliability, and scalability of Linux systems to meet business needs.
• Document system configuration, mapping, processes, and service records.
• Address and resolve technical issues swiftly and efficiently.
• Plan and schedule the installation of new or modified virtual service deployments, operating systems, and application software.
• Manage accounts and network rights.
• Oversee system resources, including performance, capacity, availability, serviceability, and recoverability.
• Implement security procedures and tools.
• Develop and document systems administration standard operating procedures. Resolve significant hardware/software interface and interoperability issues.
• Ensure systems' availability, functionality, integrity, and efficiency, and maintain systems configuration.
• Manage the installation and integration of system fixes.

Clearance Level: Secret with eligibility for upgrade to Top Secret (TS)

Education: N/A

Certification: Must possess DoD 8570 IAT Level II and DoD 8140 CSSP Auditor compliant certifications.

Experience:

• Proficiency in Linux operating systems specifically with Red Hat
• Experience with Linux server administration
• Knowledge of DNS, DHCP, and other Linux-based services
• Experience with virtualization technologies such as VMware and ESXi
• Strong understanding of network protocols and services (TCP/IP, DNS, SMTP, HTTP/S, etc.)
• Experience with shell scripting and automation using Ansible
• Excellent troubleshooting skills
• Strong documentation skills
• Container orchestration and container deployments

Highly desired skills:

• Experience with cloud services (e.g., AWS, Azure) and hybrid environments
• Knowledge of database management (e.g., MySQL, PostgreSQL)
• Experience with configuration management tools (e.g., Ansible, Puppet, Chef)
• Familiarity with ITIL processes and practices
• Understanding of cybersecurity principles and best practices
• Familiarity with Confluence and Jira
• Experience working in classified environments
• Certifications such as Red Hat Certified System Administrator (RHCSA), Red Hat Certified Engineer (RHCE), or CompTIA Linux+

Our unique ownership model attracts top talent, giving employees the freedom to take initiative and drive meaningful improvements. In addition to cultivating a thriving and inclusive work environment, Sentar offers an extensive benefits package designed to support the well-being of employees and their families. Employee ownership is the foundation of our culture, promoting participation, teamwork, and accountability while ensuring long-term financial security and a commitment to excellence.

• Voluntary Medical, Dental, Vision, with Health Savings or Flexible Spending Plan options
• Voluntary Life, Critical Illness, Accident, and Long Term Care insurance options
• Group Term Life, Short-Term and Long-Term Disability is provided by Sentar to all qualifying employees
• Generous 401(k) match
• Competitive PTO plan that graduates quickly with years of service
• Other leave programs; holiday schedule along with bereavement, maternity, jury and military duty
• Mental health awareness programs
• Tuition reimbursement
• Professional development reimbursement
• Recognition and Awards programs

Sentar is proud to be an employee-owned company, fostering a culture of empowerment, collaboration, and innovation. Sentar is dedicated to developing the critical talent that the connected world demands to create solutions to address the convergence of cybersecurity, intelligence, analytics, and systems engineering. We invite you to join the team where you can build, innovate, and secure your career., Sentar is an Affirmative Action and Equal Opportunity Employer M/F/Vets/Persons with Disabilities Our culture is one of inclusivity and support. Sentar is proudly an Equal Opportunity and VEVRAA Federal Contractor Employer M/F/Vets/Persons with Disabilities. Follow these links to learn more about your rights: EEO Is the Law Poster ; EEO Is Law Supplement ; and Pay Transparency .