Linux Administrator

Sentar•Charleston, SC

About The Position

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 seeking a Linux Administrator in Charleston! Role Description: 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.

Requirements

Clearance Level: Secret with eligibility for upgrade to Top Secret (TS)
Must possess DoD 8570 IAT Level II and DoD 8140 CSSP Auditor compliant certifications.
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

Nice To Haves

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+

Responsibilities

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.

Benefits

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