Sr. Linux Systems Administrator

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

Job summary

Dunhill Professional Search & Government Solutions is seeking a skilled Linux Systems Administrator for multi-discipline IT tasks in the United States. You will manage Linux server infrastructure, perform provisioning and hardening, and support application teams across environments.

The role requires 4+ years Linux admin experience, RHCSA or equivalent, and the ability to obtain Public Trust clearance. You will participate in on-call rotations and drive automation with Ansible, Bash, and Python.

Qualifications

• Bachelor’s degree or equivalent experience; Master’s preferred.
• RHCSA or equivalent certification.
• 4 years Linux systems administration experience.
• Public Trust clearance or ability to obtain.

Responsibilities

• Manage Linux server infrastructure across environments.
• Perform provisioning, configuration, patching, and hardening.
• Monitor system health, performance, and capacity.
• Participate in 24x7 on-call rotation for Linux env.
• Implement Linux automation with Ansible, Bash, Python.
• Manage security compliance and STIG implementation.
• Support app teams with Linux infra and troubleshooting.
• Maintain documentation, runbooks, and baselines.
• Perform log management and performance tuning.
• Manage LDAP/AD user access and authentication.

Skills

RHEL 7/8/9

Bash scripting

Ansible automation

Security hardening

Monitoring tools

Apache/Nginx

LDAP/AD integration

Education

Bachelor’s Degree in IT/CS or related field

Master’s Degree preferred

Tools

RHCSA

Job description

Salary - $110,000 - 130,000

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.

• 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.