Sr. Linux Administrator

Title: Senior Linux Platform Engineer

Type: Contract 6+ months

Location: Cambridge, MA on Site

*MUST HAVE ACTIVE SECRET CLEARANCE*

We are seeking a Senior Linux Platform Engineer to build, automate, and operate secure, scalable infrastructure platforms that support modern software delivery. This role requires deep expertise in Linux administration, Kubernetes, containerization, CI/CD, and infrastructure automation.

Responsibilities

• Design, deploy, and manage Linux-based platform infrastructure with a focus on automation, reliability, and security.
• Build and support containerized environments using Podman and Kubernetes.
• Develop Infrastructure as Code solutions using Ansible, including reusable playbooks, roles, and collections.
• Create and maintain CI/CD pipelines in GitLab, incorporating testing, security scanning, and automated deployments.
• Manage Sonatype Nexus repositories for container images, Helm charts, and software packages.
• Deploy and administer HashiCorp Vault for secrets management and credential rotation.
• Build automation tools and integrations using Python.
• Implement monitoring, logging, and alerting solutions for platform services.
• Partner with engineering, security, and SRE teams to establish platform standards and best practices.
• Mentor engineers on automation, Kubernetes, and DevOps methodologies.

Minimum Qualifications

• 5+ years of Linux administration experience, preferably with RHEL.
• 3+ years of experience with Kubernetes in production environments.
• Experience with Podman, Docker, or similar container technologies.
• Strong expertise in Ansible and Infrastructure as Code practices.
• Experience building and supporting GitLab CI/CD pipelines.
• Hands-on experience with HashiCorp Vault and Sonatype Nexus.
• Proficiency in Python scripting and automation.
• Strong knowledge of Linux networking, security hardening, and system troubleshooting.
• Experience implementing monitoring and observability solutions.

Preferred Qualifications

• Experience building and operating internal platform engineering solutions.
• Knowledge of Packer, Helm, and Kubernetes networking concepts.
• Experience with DevSecOps and software supply chain security.
• Strong technical documentation and cross-functional communication skills.
• Proven ability to lead technical initiatives and mentor junior engineers.

Technologies

RHEL, Kubernetes, Podman, Ansible, GitLab CI/CD, HashiCorp Vault, Nexus Repository Manager, Packer, Python, Helm, Infrastructure as Code (IaC), DevOps, DevSecOps, Monitoring and Observability.Medical, dental, and vision insurance are available to qualified candidates who meet eligibility requirements.