Systems Administrator

Cytek Biosciences Inc•Fremont, CA

25d

About The Position

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.

Requirements

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 solutions
Comfortable working in a small IT team where you'll need to be both strategic and hands-on

Nice To Haves

Experience in a life sciences, biotech, or regulated environment
Scripting skills (PowerShell, Bash, Python) for automation
Experience with Docker or containerized environments
Any relevant certifications (CCNA, CompTIA Network+, Microsoft, AWS/Azure)

Responsibilities

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
Manage and troubleshoot LAN/WAN, Wi-Fi, VPN (Cisco AnyConnect), 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
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
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
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 (NetSuite, 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