Systems Administrator (Windows, Unix, Linux)

Resource Management Concepts, Inc. • Charleston, SC

5h

About The Position

Resource Management Concepts, Inc. (RMC) delivers professional management and technology services to government and commercial clients. Our mission is to provide innovative solutions that safeguard and support the people, infrastructure, and environment of the United States.
We are seeking a skilled Systems Administrator with experience managing both Windows and Linux environments. The ideal candidate will ensure the stability, security, and performance of enterprise systems while providing reliable technical support and implementing best practices across diverse IT environments.

Requirements

• Proficiency in Windows Server (2016–2022) and Linux administration (RHEL, Ubuntu, CentOS).
• Experience managing Active Directory and Linux user/group environments.
• Knowledge of networking protocols (TCP/IP, DNS, DHCP, SMTP, HTTP/S).
• Hands-on experience with virtualization (VMware, Hyper-V, KVM).
• Scripting proficiency in PowerShell, Bash, or Python.
• Understanding of DoD system hardening, security compliance, and cybersecurity best practices.
• Strong troubleshooting, communication, and documentation skills.
• Active DoD Secret clearance (minimum).
• Must meet DoD 8570/8140 IAT-II certification requirements.
• Willingness to travel up to 25%, including possible OCONUS assignments.

Nice To Haves

• Relevant certifications such as Microsoft Windows Server Hybrid Administrator Associate, Azure Administrator Associate, or AWS Cloud Practitioner.
• Experience managing cloud and hybrid infrastructures (AWS, Azure).
• Knowledge of databases such as SQL Server, MySQL, or PostgreSQL.
• Familiarity with automation and configuration management tools (Ansible, SCCM, Puppet, Chef).
• Understanding of ITIL processes and cybersecurity frameworks.
• Experience with Scaled Agile Framework (SAFe) version 6.0.

Responsibilities

• Install, configure, and maintain Windows Server (2016, 2019, 2022) and Linux systems (RHEL, Ubuntu, CentOS, or similar).
• Administer Active Directory, DNS, DHCP, Group Policy, and Linux user/group permissions.
• Implement and manage data backup, recovery, and disaster recovery processes.
• Apply operating system patches, updates, and maintain system tools and utilities.
• Monitor and analyze system performance, generating regular status and error reports.
• Develop and maintain detailed procedures for installation, configuration, and maintenance.
• Manage and verify security controls, including firewalls, antivirus, and intrusion detection systems.
• Execute system upgrades, configuration changes, and data archival as needed.
• Collaborate with network, application, and database teams to ensure system availability and scalability.
• Troubleshoot and resolve complex technical issues efficiently.
• Provide after-hours on-call support on a rotational basis.

Benefits

• At RMC, we're committed to your career growth! RMC differentiates itself from other firms through its investment in our employees. We invest our resources to train, certify, educate, and build our employees.
• RMC can offer you a great place to work with a small company feel and give you the experience, tuition assistance, and certifications that will take your career to the next level. This also includes a competitive paid vacation package with 11 paid federal holidays. Additionally, we also offer high-quality, low-deductible healthcare plans, pet insurance, and a competitive 401K package.
• Salary at RMC is determined by various factors, including but not limited to location, a candidate's specific combination of education, knowledge, skills, competencies, and experience, as well as contract-specific requirements.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 251-500 employees