Senior Systems Administrator (Linux/Windows)

We are seeking a highly skilled Senior System Administrator to join our client's enterprise IT team, which is onsite in Fremont, CA. We are unable to consider 3rd party candidates.

In this role, you will be responsible for maintaining, securing, and optimizing mission-critical systems and infrastructure across a complex, multi-site environment. You will take initiatives to improve performance, reliability, scalability, and security, including cloud services, servers, storage, virtualization, security, and data centers.

Additional responsibilities are to include, but not limited to, the following:
* Administer and support Windows, Linux, and/or hybrid cloud environments (M365,Azure).
* Manage Active Directory, Group Policy, DNS, DHCP, file/print services, and authentication protocols (SSO, LDAP, Kerberos).
* Oversee system performance tuning, patching, backups, and disaster recovery planning.
* Implement infrastructure projects including server migrations, hardware/software upgrades, and security audits.
* Implement and maintain virtualization platforms (VMware, Hyper-V, etc.).
* Ensure system and data security through hardening, access controls, monitoring, and regular audits.
* Automate repetitive tasks using PowerShell, Bash, Python, or configuration management tools (e.g., Ansible, Puppet, Chef).
* Maintain documentation for systems, processes, and procedures.
* Provide Tier 3 support and serve as an escalation point for complex issues.
* Collaborate with InfoSec, Applications and networking teams to align system policies with enterprise standards.
* Responsible for managing open-source solutions
* Responsible for Managing Server/Storage/Data center Hardware
* Flexibility to work with Asia/Brazil Time zones
* Other duties and projects as assigned

Qualifications::
* Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience).
* 5-8+ years of experience in system administration in large enterprise environments.
* Expertise in managing Windows Server and/or Linux, Kubernetes distributions at scale.
* Experience with cloud infrastructure (Azure) and hybrid deployments.
* Certifications such as Microsoft/VMware/RedHat Certified are preferred

Skills:
* Strong Experience in Configuration & Troubleshooting of Linux, Windows 2019/2022 Servers, Kubernetes and VMWare
* Knowledge of scripting/PowerShell, Active Directory, Group Policy, DNS and DHCP
* Resolve issues with M365, Email, skype for business, and Mobile device management.
* Working Knowledge of Networking (TCP/IP), LAN/WAN systems, LAN protocols,
* Experience in performing daily tasks like monitoring Backups and Restores of critical data

All qualified applicants will receive consideration for employment without regard to race, color, national origin, age, ancestry, religion, sex, sexual orientation, gender identity, gender expression, marital status, disability, medical condition, genetic information, pregnancy, or military or veteran status. We consider all qualified applicants, including those with criminal histories, in a manner consistent with state and local laws, including the California Fair Chance Act, City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, and Los Angeles County Fair Chance Ordinance. For unincorporated Los Angeles county, to the extent our customers require a background check for certain positions, the Company faces a significant risk to its business operations and business reputation unless a review of criminal history is conducted for those specific job positions.