Freelance Bash Shell Scripting Jobs in Tolleson, AZ

Linux Systems Administrator (Enterprise Infrastructure)

Location: Boulder, CO (Hybrid/Onsite – details available upon request)

Contract Details: 6 month(s)

Company Overview

Our client is a well-established research and technology-driven organization that supports a large-scale enterprise environment consisting of Linux, virtualization, cloud, storage, networking, and authentication services. The organization is focused on maintaining highly available infrastructure while investing in modernization, automation, and security initiatives.

Position Overview

We are seeking an experienced Linux Systems Administrator to support and evolve critical enterprise infrastructure services. This individual will play a key role in ensuring the stability, security, and modernization of Linux-based infrastructure while supporting core services including DNS, DHCP, authentication systems, virtualization platforms, storage environments, and enterprise server operations.

This position is focused on enterprise-scale administration and operational excellence. The ideal candidate will possess strong Linux expertise, infrastructure administration experience, automation skills, and the ability to collaborate effectively across multiple technology teams.

Key Responsibilities

• Administer, maintain, and support enterprise Linux environments, including AlmaLinux, RHEL, and related distributions.
• Manage core infrastructure services including DNS, DHCP, authentication services, SMTP/mail relays, and related enterprise technologies.
• Support VMware virtualization environments and enterprise storage platforms.
• Install, configure, maintain, troubleshoot, tune, and optimize Linux servers and infrastructure services.
• Support authentication and identity-related technologies and participate in modernization initiatives.
• Develop and maintain automation and operational scripts utilizing Python, Bash/Shell Scripting, and Perl.
• Troubleshoot complex infrastructure, server, networking, storage, and authentication issues.
• Participate in strategic planning efforts related to infrastructure modernization and future-state architecture.
• Collaborate with Networking, Cybersecurity, Cloud, Identity Management, AI, and Web Operations teams on enterprise projects.
• Support highly available enterprise systems and ensure service reliability.
• Manage workflow and support requests through established IT service management practices.
• Develop and maintain technical standards, procedures, system documentation, and operational runbooks.
• Provide knowledge transfer and documentation deliverables to ensure long-term supportability.
• Participate in Agile teams and infrastructure initiatives.
• Evaluate emerging technologies and recommend solutions that improve efficiency, reliability, and security.
• Support vendor relationships and assist with infrastructure acquisition, implementation, and lifecycle management.

Top Required Skills

• Expert-level Linux Administration
• Red Hat Enterprise Linux (RHEL)
• AlmaLinux/CentOS
• VMware Virtualization
• DNS Administration
• DHCP Administration
• Enterprise Authentication Services
• Python Scripting
• Bash/Shell Scripting
• Perl Scripting
• Linux Performance Tuning & Troubleshooting
• Enterprise Storage Administration
• Networking Fundamentals (DNS, VLANs, Routing, Enterprise Integrations)

Preferred Skills

• RADIUS administration and migration experience
• LDAP administration
• Identity & Access Management (IAM)
• NetApp storage administration
• SMTP and mail relay administration
• Google Workspace administration and integrations
• OpenBSD or FreeBSD administration
• Windows Server administration
• Enterprise backup and disaster recovery solutions
• Infrastructure modernization and legacy system retirement projects

Additional Requirements

• Strong written and verbal communication skills.
• Ability to collaborate effectively with cross-functional technical teams.
• Experience supporting heterogeneous enterprise environments.
• Ability to operate independently while aligning with organizational standards and priorities.
• Strong documentation and knowledge-transfer skills.

Notes

• Environment consists of Linux, OpenBSD, FreeBSD, Windows Server, virtualization platforms, cloud services, storage infrastructure, and enterprise authentication systems.
• Supports mission-critical enterprise and research-focused operations.
• Expert-level role requiring strong technical depth and enterprise infrastructure experience.

Why Join

• Opportunity to work in a complex enterprise infrastructure environment.
• Exposure to modernization initiatives involving cloud, automation, identity management, cybersecurity, and AI platforms.
• High-impact role supporting critical systems and services.
• Collaborative culture with opportunities to contribute to strategic technology initiatives.

Job Type & Location

This is a Contract position based out of Phoenix, AZ.

Pay and Benefits

The pay range for this position is $55.00 - $65.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully remote position.

Application Deadline

This position is anticipated to close on Aug 12, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.