Linux Systems Administrator

1 month ago

Dahlgren, Virginia, United States Apex Systems Full time
Linux Systems Administrator Job Description

We are seeking a highly skilled Linux Systems Administrator to join our team at Apex Systems. As a Linux Systems Administrator, you will be responsible for the installation, configuration, and maintenance of Linux-based systems, including servers and workstations.

Key Responsibilities:

  • Utilize Red Hat Enterprise Linux system administration experience to provide technical problem solving and in-depth consulting relative to system operations
  • Automate installation methods and system imaging (e.g. Kickstart/Ansible)
  • Use cryptographic experience to set up public key infrastructure (PKI) to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption
  • DISA STIG implementation and work within Configuration-Managed Environments
  • Analyze, design, and implement modifications to system software to improve and enhance system performance by correcting errors
  • Plan new hardware acquisitions, interact with vendors, educate customers, and collaborate with other projects within the organization
  • Work closely with engineers to help them use workstations and servers to solve their computationally intensive problems
  • Support application installation, license management, software tracking / distribution and backup/recovery of system configurations and user data files
  • Understand and use essential tools for handling files, directories, command-line environments, and documentation
  • Operate running systems, including booting into different run levels, identifying processes, starting and stopping virtual machines, and controlling services
  • Configure local storage using partitions and logical volumes
  • Create and configure file systems and file system attributes, such as permissions, encryption, access control lists, and network file systems
  • Deploy, configure, and maintain systems, including software installation, update, and core services
  • Manage users and groups, including use of a centralized directory for authentication
  • Manage security, including basic firewall and SELinux configuration
  • Configure static routes, packet filtering, and network address translation
  • Set kernel runtime parameters
  • Produce and deliver reports on system utilization
  • Use shell scripting to automate system maintenance tasks
  • Configuring system logging, including remote logging
  • Configure a system to provide networking services, including HTTP/HTTPS, DNS, SMTP, SSH and NTP

Qualifications:

  • Minimum three - six years (3-6) experience in system administration of Linux-based servers and Linux-based workstations
  • CompTIA Security+ certification (or equivalent IAT II certification)
  • Ideal Linux Admin will have troubleshooting skills in RHEL 7/8/9 OS and basic knowledge of Networking fundamentals, specifically TCP/IP protocol suite and IP configuration
  • In addition, working knowledge of security guidelines and polices (DISA STIGs) and tools (Evaluate-STIG, STIG-Manager)
  • Knowledge of / experience with Tenable suite of products (Security Center, Nessus Scanner, Nessus Agent) is a plus
  • Seeking specific experience with the following operating systems and services is required: Red Hat Enterprise Linux (RHEL 8.x with RHEL 7.x and/or RHEL9.x a plus)
  • Have knowledge of corporate services including: DNS, SMTP, Splunk, Centralized patching solutions such as Red Hat Satellite, Automation solutions such as Ansible Tower / AWX
  • Knowledge of / experience with: Single Sign on solutions such as RHSSO; Virtualization platform management systems such as VMWare / VSphere / Vcenter is a plus
  • Demonstrated experience managing the installation and maintenance of IT infrastructure
  • Experience working in an environment with rapidly changing job priorities
  • Experience with Service Now or similar Ticket Management system
  • Linux+ or Red Hat Certification preferred

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