Systems Administrator

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Full Time Fremont, CA, US

6 days ago Requisition

Salary Range: $ To $ Annually

Cytek Biosciences is looking for a Systems & Network Administrator to own our infrastructure environment — servers, storage, virtualization, and networking. We need someone dedicated to building proactive infrastructure management practices while also serving as the go‑to escalation point for network and systems issues.

This is a hands‑on role. You'll manage our VM environment, maintain our VPN and network infrastructure across multiple sites, and handle server provisioning and storage. You'll work closely with our Information Security Specialist on security‑related infrastructure changes and partner with the helpdesk and business systems teams to reduce the operational burden on them and improve service delivery across the organization.

ESSENTIAL DUTIES AND RESPONSIBILITIES
:

To perform this job successfully, an individual must be able to perform essential duties and responsibilities satisfactorily. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Infrastructure & Server Management

• Administer and maintain Windows and Linux server environments, including virtual machines (VMware/Hyper‑V) and cloud resources (Azure, AWS)
• Manage server provisioning, capacity planning, storage allocation, and decommissioning
• Own backup and disaster recovery processes, including regular validation and testing
• Monitor system health, performance, and availability; resolve issues before they become outages

Network Administration

• Manage and troubleshoot LAN/WAN, Wi‑Fi, VPN (Cisco Any Connect), DNS, DHCP, and switching infrastructure
• Support multi‑site connectivity between Fremont, Seattle, and international offices
• Handle network access requests, VPN setup, and connectivity issues as an escalation point from the helpdesk
• Maintain and document network topology, configurations, and access controls
• Implement firewall and network changes as directed by the Information Security Specialist

Identity & Access Management

• Administer Active Directory, Group Policy, and user account lifecycle (provisioning, changes, deprovisioning)
• Manage DUO MFA enrollment and troubleshooting in coordination with the Information Security Specialist on policy configuration
• Support onboarding and offboarding processes from an infrastructure and access perspective

Infrastructure Maintenance & Patching

• Apply OS and firmware patches to servers, network devices, and infrastructure components on schedules defined in coordination with the Information Security Specialist
• Maintain patching documentation and change logs
• Coordinate maintenance windows with stakeholders to minimize business disruption

Collaboration & Process Improvement

• Serve as Tier 2/3 escalation for infrastructure‑related helpdesk tickets
• Reduce reactive ticket volume by implementing monitoring, automation, and self‑service solutions
• Document infrastructure environments, runbooks, and standard operating procedures
• Partner with the business systems team on integration points (Net Suite, Salesforce, Propel) where infrastructure supports application performance
• Support the Information Security Specialist during incident response by providing infrastructure access, logs, and system‑level remediation as needed

REQUIREMENTS & QUALIFICATIONS:

The requirements listed below are representative of the knowledge, skill, and/or ability required.

What We're Looking For

• 10 years of experience in systems administration, network administration, or a combined infrastructure role
• Strong hands‑on experience with Windows Server, Active Directory, and Group Policy
• Experience managing virtualization platforms (VMware, Hyper‑V) and cloud environments (Azure and/or AWS)
• Solid networking fundamentals — TCP/IP, DNS, DHCP, VPN, switching, and Wi‑Fi
• Familiarity with backup and disaster recovery tools and practices
• Ability to manage infrastructure across multiple physical sites
• Strong troubleshooting skills and a bias toward documenting…