Senior System Administrator

TISTA Science and Technology is seeking a Senior System Administrator to join our growing team.

At TISTA, you’ll do meaningful, mission‑driven work that improves lives alongside teammates you trust and leaders who are transparent and supportive. We invest in your learning and internal mobility so you can build a career that keeps advancing. We’re proud to serve and hire Veterans, and we put people first in everything we do.

TISTA associates enjoy above Industry Healthcare Benefits, Remote Working Options, Paid Time Off, Training/Certification opportunities, Healthcare Savings Account & Flexible Savings Account, Paid Life Insurance, Short-term & Long-term Disability, 401K Match, Professional development reimbursement, Employee Assistance Program, Paid Holidays, Military Leave, and much more!

• Manages the full lifecycle of RHEL servers, focusing on installation, configuration, maintenance, and security in a Web Environment.
• Install, configure, and maintain RHEL servers and virtual platforms (Cloud-AWS, Azure).
• Develop scripts (Bash, Python) or use Ansible to automate routine tasks, such as user management, software updates, and patching.
• Implement and manage security protocols, including SELinux, firewalls, access control lists (ACLs), and user/group permissions.
• Monitor system performance, resource utilization, and logs to ensure high availability, stability, and performance.
• Use Red hat Satellite to manage repositories, content views, and software updates across the enterprise.
• Configure logical volumes, file systems, and manage backups to prevent data loss.
• Resolve complex server-level issues, conduct rot cause analysis, and provide technical assistance.

• Expertise in RHEL 7/8/9 environments.
• Apache, and Drupal Support.
• Proficiency in command-line tools and shell scripting (Bash).
• Strong understanding of networking (TCP/IP, firewalls).
• Familiarity with automation tools (Ansible) and container technology (Podman/Docker).

Education:

• Bachelor’s degree in computer science, electronics engineering or related technical discipline and 5+ years’ work experience.
• Eight (8) years of additional relevant experience may be substituted for education (13 years total).

Clearance: 

• The ability to pass a Tier 4/HIGH Background Investigation.

Location:

• Remote, USA.
• Monday - Friday (8:00 AM - 4:30 PM EST).

Pay Range:

• The pay for this position ranges from $52,730 to $72,500.
• The actual salary offer will carefully consider a wide range of factors, including your skills, qualifications, experience, and location.
• Also, certain positions are eligible for additional forms of compensation, such as bonuses.
• TISTA associates are eligible to participate in our comprehensive benefits plan! More information can be found here: https://tistatech.com/working-at-tista/