Senior Systems Administrator

Calix

full-time

Posted on: 9/18/2025

Origin: • 🇺🇸 United States

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💰 $116,000 - $197,000 per year

Senior

AnsibleAzureChefCloudCyber SecurityDNSDockerGoogle Cloud PlatformITSMKubernetesLinuxPuppetTerraformVMware

About the role

Lead the administration and lifecycle management of core infrastructure technologies including virtualization platforms (VMware, KVM), storage systems, and cloud environments (GCP, Azure).
Architect and implement scalable, secure, and resilient infrastructure solutions that support engineering and product development.
Serve as a subject matter expert in Linux and Windows systems administration, automation, and configuration management.
Drive incident response and root cause analysis for complex infrastructure issues; lead post-mortem reviews and continuous improvement efforts.
Develop and maintain infrastructure documentation, including architecture diagrams, SOPs, and knowledge base articles.
Mentor junior team members and contribute to the development of team standards and best practices.
Collaborate with internal stakeholders to translate business and technical requirements into actionable infrastructure strategies.
Evaluate and recommend new technologies, tools, and vendors to enhance infrastructure capabilities.
Lead vendor performance reviews and participate in strategic planning for infrastructure investments.
Define and track key performance indicators (KPIs) to measure system health, team productivity, and service quality.
Participate in capacity planning, budgeting, and roadmap development for infrastructure services.

5–8 years of experience in systems administration, infrastructure engineering, or related IT roles.
Proven experience leading infrastructure projects and cross-functional initiatives.
Strong communication and interpersonal skills; able to influence and collaborate across teams.
Demonstrated ability to prioritize and manage multiple initiatives in a dynamic environment.
Deep understanding of IT service management (ITIL), DevOps practices, and Agile methodologies.
Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).
Availability for off-hours support and collaboration with global teams.
Occasional travel may be required.
Preferred: Expertise in virtualization (VMware, KVM, Hyper-V) and containerization (Docker, Kubernetes).
Preferred: Strong knowledge of IP networking, VLANs, routing, DNS, and virtual networking.
Preferred: Experience with infrastructure automation tools (Ansible, Chef, Puppet, Terraform).
Preferred: Familiarity with identity and access management (Active Directory, LDAP).
Preferred: Experience with converged/hyperconverged infrastructure and SAN/NAS storage.
Preferred: Cybersecurity awareness and experience implementing secure infrastructure practices.