L3 Server Infrastructure Lead (Unix/Linux)

Gruve; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Gruve is seeking an experienced Unix/Linux Compute Subject Matter Expert to lead L3 technical efforts and own operations for a global Unix/Linux estate. The role focuses on stability, security, patching, and capacity management across APAC/EMEA/NLAM, guiding L1/L2 teams and coordinating with Security, Database, Storage, Network, Cloud, and Applications.

Responsibilities include supervising incident handling, CIS hardening, and lifecycle management; driving automation and runbooks, and ensuring

Qualifications

• 8–12+ years of enterprise Unix/Linux infrastructure and production operations (as required).
• Hands-on Unix/Linux system administration experience.
• Expert knowledge of one or more: RHEL, Ubuntu, AIX, Solaris.
• Strong troubleshooting across OS, filesystem, processes, performance and services.
• OS patching, vulnerability remediation and CIS hardening experience.
• Knowledge of LVM, NFS, SSH, DNS, filesystem management, package management, cron.
• Experience in 24x7 production operations and ITIL-based incident/change management.
• Experience leading L1/L2 teams and handling major incidents.
• Scripting and automation using Shell, Python, Ansible or equivalents.

Responsibilities

• Provide L3 technical support for P1–P4 incidents and complex OS issues.
• Lead and guide L1/L2 Unix/Linux operations teams across global regions.
• Administer and troubleshoot RHEL, Ubuntu, AIX, Solaris environments.
• Own OS patching, patch compliance and vulnerability remediation.
• Perform CIS hardening and security baseline remediation.
• Manage OS performance, capacity, and resources (filesystem, CPU, memory, I/O).
• Support server build, configuration, lifecycle, and decommissioning activities.
• Drive root cause analysis (RCA) and permanent corrective actions.
• Support monitoring and disaster recovery activities and operational readiness.
• Develop and maintain runbooks, procedures, and technical documentation.
• Identify automation opportunities to improve operational efficiency.
• Collaborate with Security, Database, Storage, Network, Cloud and App teams.
• Ensure consistent service delivery across the global follow-the-sun model.

Skills

Unix/Linux administration

Scripting (Shell, Python)

Automation with Ansible

OS patching & CIS hardening

Incident management

LVM/NFS/SSH/DNS

24x7 production operations

Follow-the-sun support

Tools

RHEL

Ubuntu

AIX

Solaris

Job description

About Gruve

Gruve is an innovative software services startup dedicated to transforming enterprises to AI powerhouses. We specialize in cybersecurity, customer experience, cloud infrastructure, and advanced technologies such as Large Language Models (LLMs). Our mission is to assist our customers in their business strategies utilizing their data to make more intelligent decisions. As a well-funded early-stage startup, Gruve offers a dynamic environment with strong customer and partner networks.

About the Role

We are looking for an experienced Unix/Linux Compute Subject Matter Expert to provide L3 technical leadership and operational ownership for a global estate of Unix/Linux server instances. The SME will be accountable for infrastructure stability, availability, security and performance, and will own patching, vulnerability remediation, lifecycle management and continuous improvement across the environment. Working within a follow-the-sun model spanning APAC, EMEA and NLAM, the role guides L1/L2 teams and partners closely with Security, Database, Storage, Network, Cloud and Application teams to deliver a consistent, high-quality service.

Key Roles and Responsibilities

• Provide L3 technical support for P1–P4 incidents and complex OS-level issues.
• Lead and technically guide L1/L2 Unix/Linux operations teams across global regions.
• Administer and troubleshoot RHEL, Ubuntu, AIX and Solaris environments.
• Own OS patching, patch compliance and vulnerability remediation.
• Perform CIS hardening and security baseline remediation.
• Manage OS performance and capacity, including filesystem, CPU, memory and I/O issues.
• Support server build, configuration, lifecycle and decommissioning activities.
• Drive problem management, root cause analysis (RCA) and permanent corrective actions.
• Support monitoring, disaster recovery (DR) activities and operational readiness.
• Develop and maintain operational runbooks, procedures and technical documentation.
• Identify and implement automation opportunities to improve operational efficiency.
• Collaborate with Security, Database, Storage/Backup, Network, Cloud and Application teams.
• Ensure consistent service delivery through the APAC–EMEA–NLAM follow-the-sun operating model.

Basic Qualifications

• 8–12+ years of experience in enterprise Unix/Linux infrastructure and production operations.
• Strong hands‑on experience in Unix/Linux system administration.
• Expert knowledge of one or more of: RHEL, Ubuntu, AIX, Solaris.
• Strong troubleshooting skills across OS, filesystem, process, performance and system services.
• Experience with OS patching, vulnerability remediation and CIS hardening.
• Strong knowledge of LVM, NFS, SSH, DNS, filesystem management, package management and cron.
• Experience in enterprise 24x7 production operations.
• Strong ITIL‑based Incident, Problem and Change Management experience.
• Experience leading and mentoring L1/L2 teams and handling major incidents.
• Strong scripting and automation skills using Shell, Python, Ansible or equivalent.

Preferred Qualifications

• Red Hat RHCSA / RHCE certification.
• Experience with enterprise monitoring and patch‑management tools.
• ServiceNow or other ITSM platform experience.
• Knowledge of VMware, AWS/Azure, and Backup/DR solutions.
• Experience working in a global follow-the-sun support model.

Why Gruve

At Gruve, we foster a culture of innovation, collaboration, and continuous learning. We are committed to building a diverse and inclusive workplace where everyone can thrive and contribute their best work. If you’re passionate about technology and eager to make an impact, we’d love to hear from you.

Gruve is an equal opportunity employer. We welcome applicants from all backgrounds and thank all who apply; however, only those selected for an interview will be contacted.