Proven experience with Red Hat Enterprise Linux (RHEL) systems administration.
Strong skills in Linux system configuration and package management using DNF/RPM.
Experience in VMware virtual environments, including VM management.
Familiarity with Active Directory and DNS administration.
Basic knowledge of Splunk installation and configuration.
Responsibilities
Administer and maintain around 30 RHEL servers across various security tiers.
Perform system administration tasks including configuration, patching, and troubleshooting.
Configure and troubleshoot Linux services like SSH/SFTP and HTTP.
Manage Red Hat software repository and distribute RPM updates monthly.
Maintain Trellix antivirus configurations across Linux systems.
Create and manage virtual machines in VMware environments.
Provide technical support to users and development teams.
Benefits
Opportunity to work in a mixed operating-system environment.
Engagement with cutting-edge technologies like VMware and Splunk.
Collaboration with cross-functional teams including security and development.
Potential for professional growth in a secure and dynamic setting.
Full Job Description
We are seeking an experienced Linux Systems Administrator to support and maintain multiple Red Hat Enterprise Linux (RHEL) servers operating across different security tiers. The administrator will be responsible for system administration, configuration, patching, security, monitoring, troubleshooting, and infrastructure support within a mixed Linux, Windows, and Unix environment.
The ideal candidate will have strong RHEL/Linux administration experience, hands-on experience with VMware virtual environments, and working knowledge of Windows administration, Active Directory, DNS, enterprise security, antivirus, and monitoring tools.
Key Responsibilities
Administer and maintain approximately 30 RHEL servers across multiple security tiers.
Perform Linux system administration, configuration, patching, software/package management, file management, networking, and troubleshooting.
Configure, maintain, and troubleshoot Linux services and protocols, including SSH/SFTP, HTTP, Chrony/NTP, firewalls, and related system services.
Maintain the Red Hat software repository and manage the monthly distribution of approved RPM updates to Linux servers.
Maintain current Trellix antivirus updates and configurations across Linux systems.
Administer and maintain Trellix ePolicy Orchestrator (ePO) servers across applicable network security tiers.
Perform system and hardware monitoring to maintain server performance, availability, and reliability.
Create, configure, maintain, and troubleshoot virtual machines in VMware environments, including resource allocation and system snapshots.
Support system recovery activities and troubleshoot operating system, application, network, hardware, and virtualization issues.
Provide technical support to end users and development teams.
Support a mixed operating-system environment consisting of Linux, Windows, and Unix systems.
Provide backup Windows administration support, including user account creation and management.
Assist with Active Directory and DNS administration.
Support cross-platform user authentication across Windows, Linux, and Unix systems using Quest.
Install, configure, and maintain Splunk components as required.
Collaborate with system administrators, network teams, security personnel, and development staff to resolve technical issues and maintain system availability.
Required Qualifications and Technical Skills
Active TS/SCI security clearance.
Current CompTIA Security+ certification.
Demonstrated experience administering and troubleshooting Red Hat Enterprise Linux (RHEL) systems.
Strong working knowledge of Linux system administration, including system configuration, package/software management using DNF/RPM, patching, file systems, file management, networking, and system services.
Experience with Linux services and protocols, including SSH/SFTP, HTTP, Chrony/NTP, firewalls, and network configuration.
Experience working in VMware virtualized environments, including virtual machine creation, configuration, resource allocation, snapshots, and basic system recovery.
Understanding of Active Directory concepts, Windows administration, user account management, and DNS.
Familiarity with Quest authentication solutions and cross-platform authentication between Windows, Linux, and Unix systems.
Fundamental knowledge of Splunk, including installation and configuration.
Experience troubleshooting technical issues in an enterprise IT environment.
Strong customer-service and communication skills, with the ability to provide technical assistance to users and development teams.
Ability to work effectively in a mixed Linux, Windows, and Unix environment.
Experience supporting development teams in an enterprise IT environment.
Preferred Qualifications
AWS experience; AWS-related certifications are a plus.
