Linux System Administrator (Intermediate-Level)

Job description

Link Solutions is seeking an Intermediate Linux System Administrator (Intermediate-Level) to join our team at Clarksburg, WV. U.S. Citizen with an active DoW Secret Clearance IAT Level II Certification equivalent or higher per DoD 8570/8140 Non-remote (relocation incentive available) The Linux System Administrator will provide essential IT support services at the Clarksburg Local Network Enterprise Center (LNEC) in support of the Biometric Operations Department (BOD). This role is responsible for operating, maintaining, troubleshooting, and securing Linux-based systems and infrastructure in accordance with established Service Level Agreements (SLAs), ensuring reliable support for Army Information Technology Portfolio (AITP) systems and mission-critical operations. This is an excellent opportunity for an IT professional to support enterprise-class Linux environments within a secure Department of Defense setting. Working alongside experienced engineers, system administrators, and cybersecurity professionals, the Linux System Administrator will help maintain system availability, resolve technical issues, implement security requirements, and support infrastructure modernization initiatives. This dynamic role is ideal for a self-starter who is comfortable working in a fast-paced environment, adapting to evolving mission requirements, and independently driving tasks to completion while supporting critical operational needs. Job Responsibilities: Monitor system performance, availability, and security, proactively identifying and resolving issues to maintain operational readiness. Install, configure, patch, and upgrade Linux operating systems, applications, and supporting services in accordance with security and compliance requirements. Perform system hardening in accordance with DoD Security Technical Implementation Guides (STIGs) and other cybersecurity mandates. Manage user accounts, permissions, authentication services, and access controls across enterprise Linux environments. Configure and maintain enterprise services such as DNS, DHCP, NTP, LDAP, SSH, web services, and file-sharing solutions. Troubleshoot and resolve complex system, application, network, and performance-related issues across multiple environments. Support vulnerability remediation efforts by analyzing security scan results and implementing corrective actions. Develop and maintain automation solutions using Bash, Ansible, or other scripting and configuration management tools. Perform system backups, disaster recovery activities, and continuity-of-operations support to ensure mission resilience. Support virtualization and cloud-based infrastructure technologies, including VMware, Red Hat Virtualization, or similar platforms. Collaborate with cybersecurity, networking, and engineering teams to implement system enhancements and resolve operational issues. Maintain compliance with DoD, Army, and organizational policies, procedures, and security requirements. Support infrastructure modernization initiatives by evaluating, testing, and implementing new technologies and system improvements. Participate in incident response, root-cause analysis, and after-action reporting for system disruptions and security events. Provide technical guidance and mentorship to junior administrators and support personnel when needed. Please note that this job description is not designed to cover or contain a comprehensive listing of activities, duties, or responsibilities required of the employee. U.S. Citizen with an active DoW Secret Clearance. DoD 8570/8140 IAT Level II certification (Security+ CE, SSCP, GSEC, or equivalent). Minimum of three (3) years of relevant IT experience with direct hands-on administration of Red Hat Enterprise Linux (RHEL) and/or derivative distributions (Rocky Linux, AlmaLinux, CentOS). Demonstrated experience writing, maintaining, and troubleshooting Bash scripts for systems administration and automation. Experience installing, configuring, patching, and maintaining Linux operating systems and enterprise services. Experience troubleshooting Linux operating systems, applications, and system performance issues in enterprise environments. Familiarity with Linux user account management, permissions, file systems, process management, and system logging. Ability to work independently, navigate ambiguity, self-start tasks, and adapt to rapidly changing mission requirements. Strong technical writing skills with demonstrated experience creating and maintaining technical documentation, procedures, and system diagrams. Strong analytical, problem-solving, and interpersonal communication skills. Preferred: Experience supporting Department of Defense (DoD), Army, or other federal government environments. Familiarity with DoD Risk Management Framework (RMF), STIG implementation, and vulnerability remediation using ACAS, SCAP, or similar tools. Experience with configuration management and automation tools such as Ansible, Satellite, or Git. Experience integrating Linux systems with Active Directory, LDAP, SSSD, or enterprise identity management solutions. Familiarity with virtualization platforms such as VMware vSphere or Red Hat Virtualization. Familiarity with biometrics, biometric matching systems, and biometric data standards. Basic knowledge of web technologies, including HTML, CSS, JavaScript, Apache, and Nginx. Experience supporting mission-critical or high-availability environments. Red Hat Certified System Administrator (RHCSA), Red Hat Certified Engineer (RHCE), or equivalent Linux certification. Link Solutions Inc. offers a competitive compensation and benefits package to include paid holidays, paid time off, medical, dental, vision, company-paid long and short-term disability, life insurance, referral bonuses, relocation incentive program, certification reimbursement program, retirement, and more. Link Solutions, Inc. is an EOE. AA/M/F/D/V. We participate in the E-Verify Employment Verification Program. All your information will be kept confidential according to EEO guidelines. Link Solutions, Inc. delivers reliable and effective Information Technology services to government clients in support of critical mission needs. Delivering a broad range of Infrastructure Operations, Application Development, Cybersecurity, Virtualization, Cloud and Mobility services. If you’re looking for a technology company that values innovation, with a vision toward the future of the technology landscape, look no further than Link Solutions! Link is quality and compliance-focused, under our guiding philosophy, “Mission First, Customer Always". We are certified in ISO 9001:2015, ISO 20000-1:2018, and ISO 27001:2022; CMMC Level 2 certified; and appraised at CMMI Maturity Level 3 for Services and Development.