Senior Linux Admin – AWS Migration & Hardening Expert

Volto Consulting; Irvine (CA); On-site; USD 110,000 - 160,000; Full time

Job summary

Volto Consulting in Irvine, CA is seeking a Linux Administrator to manage enterprise Unix/Linux systems, primarily RHEL 7–9, and to lead migration efforts from on premises to AWS EC2. The role requires strong OS hardening, patching, and security controls, with experience in Java/.NET deployments and collaboration with cloud, database and middleware teams.

Candidates should have 7+ years of Unix/Linux administration and 2–3+ years on AWS, plus scripting skills in Shell/Bash.

Qualifications

• Strong hands-on experience administering Unix/Linux systems, primarily RHEL 7, RHEL 8 and RHEL 9.
• In-depth knowledge of Linux OS installation, configuration, patching, upgrades and lifecycle management.
• Proven experience in OS hardening, security baselines, user management and access controls.
• Exposure to Data Center Exit or on premises to public cloud migration programs.

Responsibilities

• Lead migration of Unix/Linux servers from on premises data centers to AWS EC2.
• Perform OS provisioning, configuration, patching and version upgrades on AWS-hosted instances.
• Implement OS hardening, security controls and compliance standards across environments.
• Support application deployments and troubleshoot OS-level issues for Java and .NET workloads.
• Coordinate with cloud, database and middleware teams during migration and cutover activities.
• Ensure system availability, performance and stability during migration and steady-state operations.
• Automate routine administration tasks using scripting and configuration best practices.
• Maintain system documentation, runbooks and operational procedures.

Skills

Unix/Linux administration

RHEL 7-9

AWS

Shell/Bash scripting

Security hardening

CI/CD familiarity

Automation/ IaC awareness

Tools

AWS EC2

TIBCO middleware

Job description

Volto Consulting in Irvine, CA is seeking a Linux Administrator to manage enterprise Unix/Linux systems, primarily RHEL 7–9, and to lead migration efforts from on premises to AWS EC2. The role requires strong OS hardening, patching, and security controls, with experience in Java/.NET deployments and collaboration with cloud, database and middleware teams.

Candidates should have 7+ years of Unix/Linux administration and 2–3+ years on AWS, plus scripting skills in Shell/Bash.