+ Senior Systems Administrator - Unix / Linux +

The Tatitlek Corporation•Dahlgren, VA

60d

About The Position

ESSENTIAL DUTIES AND RESPONSIBILITIES: Responsible for managing secure, high-performance Unix/Linux environments supporting mission-critical operations Perform daily administration of Unix/Linux systems across classified and unclassified environments. Manage system backup and recovery to ensure data integrity and business continuity. Conduct basic software management, including patching, updates, and version control. Implement security management protocols, including firewall configurations and vulnerability mitigation. Maintain library management for system documentation and software repositories. Ensure compliance with DoD cybersecurity standards under the IAT III designation, including system hardening and audit readiness. Install and configure hardware components and COTS software across operational systems. Operate systems in diverse environments, including virtualized and bare-metal deployments. Conduct performance tuning, resource allocation, and troubleshooting across hardware, software, and network layers. Administer systems using TCP/IP and other major network protocols. Utilize network security tools such as firewalls, intrusion detection systems, and vulnerability scanners. Stay current on attack methods and detection strategies to proactively secure systems. Manage enterprise systems and ensuring operational availability. Support cybersecurity posture through configuration and monitoring. Advise on system architecture and integration strategies.

Requirements

Six (6) years of professional experience in Unix and/or Linux system administration of networks and software systems.
Experience in system backup and recovery; basic software management; security management and library management; installation and configuration of hardware; operational systems and COTS software; operating computer systems in different operating environments; and sizing, performance, tuning, hardware/software/network trouble shooting and resource allocation.
Qualified experience in different network protocols including TCP/IP and major network security tools such as: firewalls, knowledge of computing and networking vulnerabilities, attach methods and latest detection methods.
This position is required to be designated as an IT Level 1 with a T5/T5R investigation with a CWF designation at the IAT III level or 451 Work Role Code with the proficiency level of Advanced. (e.g., CASP+, CISSP, or equivalent)
Must have a Secret clearance or higher depending on the contract requirements.

Responsibilities

Managing secure, high-performance Unix/Linux environments supporting mission-critical operations
Performing daily administration of Unix/Linux systems across classified and unclassified environments.
Managing system backup and recovery to ensure data integrity and business continuity.
Conducting basic software management, including patching, updates, and version control.
Implementing security management protocols, including firewall configurations and vulnerability mitigation.
Maintaining library management for system documentation and software repositories.
Ensuring compliance with DoD cybersecurity standards under the IAT III designation, including system hardening and audit readiness.
Installing and configuring hardware components and COTS software across operational systems.
Operating systems in diverse environments, including virtualized and bare-metal deployments.
Conducting performance tuning, resource allocation, and troubleshooting across hardware, software, and network layers.
Administering systems using TCP/IP and other major network protocols.
Utilizing network security tools such as firewalls, intrusion detection systems, and vulnerability scanners.
Staying current on attack methods and detection strategies to proactively secure systems.
Managing enterprise systems and ensuring operational availability.
Supporting cybersecurity posture through configuration and monitoring.
Advising on system architecture and integration strategies.