Linux System Admin

Teksystems seeks a Linux Administrator to join our growing team in Dahlgren, VA. Working as part of a team, administer and manage servers and end-user workstations in both unclassified and classified network environments on a Research, Development, Test and Evaluation (RDT&E) Program.

Essential responsibilities of the Senior Linux Administrator include, but are not limited to:

• 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