Sr. Linux Systems Administrator

Dunhill Professional Search & Government Solutions; United States; On-site; USD 110,000 - 130,000; Full time

Job summary

This position requires expertise in Linux systems administration with responsibility for multi-environment server infrastructure. Tasks include provisioning, patching, hardening, health monitoring, and on-call support for Linux ecosystems.

The role emphasizes automation via Ansible, Bash, and Python, plus security hardening using STIGs and LDAP/AD integration. Applicants should have a Bachelor’s in IT/CS (Master’s preferred), at least 4 years of Linux admin experience, and the ability to obtain

Qualifications

• Bachelor’s Degree in Information Technology, Computer Science or related field, or equivalent experience.
• Red Hat Certified System Administrator (RHSCA) or equivalent.
• 4+ years Linux systems administration experience.
• Public Trust clearance (or ability to obtain).
• No Dual Citizens

Responsibilities

• Manage Linux server infrastructure across environments.
• Provision, configure, patch, and harden systems.
• Monitor system health, performance, and capacity.
• Participate in 24x7 on-call rotation for Linux environment.
• Implement Linux automation using Ansible, Shell scripting, and Python.
• Manage Linux security compliance and STIG implementation.
• Support application teams with Linux infrastructure and troubleshooting.
• Maintain Linux documentation, runbooks, and configuration baselines.
• Perform log management and system performance tuning.
• Manage user access controls and authentication (LDAP/AD integration).

Skills

RHEL 7/8/9

Shell scripting (Bash)

Package management (yum/dnf/apt)

Ansible automation

STIGs security hardening

Monitoring tools

Apache/Nginx

Education

Bachelor’s Degree in IT/CS or related field

Master’s Degree preferred

Tools

RHSCA

Job description

Responsible for unique or complex information systems and/or information technology tasks within more than one discipline, such as application support, database administration, software quality assurance/quality control, software engineering, network telecommunications, and infrastructure operations of administration, analysis, engineering and design.

Salary - $110,000 - 130,000

• Manage Linux server infrastructure (RHEL, CentOS, Ubuntu) across all environments.
• Perform system provisioning, configuration, patching, and hardening.
• Monitor system health, performance, and capacity.
• Participate in 24x7 on-call rotation for Linux environment.
• Implement Linux automation using Ansible, Shell scripting, and Python.
• Manage Linux security compliance and STIG implementation.
• Support application teams with Linux infrastructure and troubleshooting.
• Maintain Linux documentation, runbooks, and configuration baselines.
• Perform log management and system performance tuning.
• Manage user access controls and authentication (LDAP/AD integration).

Minimum Qualifications

• Bachelor’s Degree in Information Technology, Computer Science or a related field or equivalent relevant experience; Master’s Degree preferred.
• Red Hat Certified System Administrator (RHSCA) or equivalent
• 4+ years Linux systems administration experience.
• Public Trust clearance (or ability to obtain).
• No Dual Citizens

Other Job Specific Skills

• Strong in: RHEL 7/8/9, shell scripting (Bash), package management (yum/dnf/apt).
• Knowledge: Ansible automation, security hardening (STIGs), monitoring tools, Apache/Nginx.