Senior IT Infrastructure Engineer

Fremont, CA

* The Senior IT Infrastructure Engineer is responsible for designing, implementing, supporting, and maintaining the organization's core IT infrastructure across network, server, cloud, cybersecurity, identity, endpoint, and backup/disaster recovery environments. This role supports reliable, secure, and scalable IT operations while helping protect business systems, users, and data * The position requires hands-on technical experience with enterprise infrastructure technologies, including firewalls, Fortinet, virtualization platforms, Nutanix, VMware, cloud services, identity platforms, endpoint management, cybersecurity tools, and IT service management systems * Design, configure, monitor, and support enterprise network infrastructure, including LAN, WAN, VPN, wireless, routing, switching, and firewall environments * Administer and troubleshoot Fortinet firewalls, VPNs, security policies, NAT rules, routing, IPS/IDS, and network segmentation * Support secure remote access technologies, including ZTNA solutions * Assist with network performance monitoring, capacity planning, and availability improvement * Maintain accurate network diagrams, firewall rules documentation, and infrastructure standards * Manage Windows and Linux server environments, including patching, monitoring, performance tuning, and troubleshooting * Administer virtualization platforms such as VMware and Nutanix * Support compute, storage, and hyperconverged infrastructure environments * Perform system upgrades, migrations, lifecycle replacements, and infrastructure optimization * Maintain server hardening standards, baseline configurations, and operational documentation * Support cloud environments in Microsoft Azure and AWS * Assist with cloud networking, identity integration, storage, compute, backup, security, and monitoring * Support hybrid infrastructure integrations between on-premises environments and cloud platforms * Assist with cloud security controls, access management, logging, and cost optimization * Administer Active Directory, Group Policy, DNS, DHCP, and related Windows infrastructure services * Support identity and access management platforms such as Okta and Microsoft Entra ID * Assist with SSO, MFA, conditional access, role-based access, and account lifecycle management * Support Microsoft Intune for endpoint enrollment, configuration profiles, compliance policies, application deployment, device security, and remote wipe * Maintain endpoint standards for laptops, desktops, and servers * Support cybersecurity tools and processes across endpoint, email, network, identity, and cloud environments * Administer or support tools such as EDR/XDR, Darktrace, Mimecast, Microsoft Purview, Okta, Fortinet security features, and related monitoring platforms * Assist with vulnerability management, patch compliance, security alert triage, incident response, and remediation * Support data protection initiatives, including DLP, retention, classification, encryption, and secure file handling * Help maintain security documentation, evidence, and controls aligned with company policies and compliance requirements * Manage backup and recovery platforms for servers, cloud systems, file shares, and critical applications * Support Backup/DR planning, testing, documentation, and recovery validation * Monitor backup jobs, troubleshoot failures, and ensure recovery objectives are met * Assist with disaster recovery exercises and infrastructure resilience improvements * Use ServiceNow or similar ITSM platforms to manage incidents, requests, changes, problems, and operational tasks * Participate in change management, maintenance windows, root cause analysis, and escalation processes * Provide Tier 2/Tier 3 technical support for infrastructure-related issues * Collaborate with IT support teams, security teams, vendors, MSPs, and business stakeholders * Create and maintain technical documentation, runbooks, diagrams, standards, and procedures ### Benefits * 401(k) with employer contributions * Team member appreciation awards * Monthly all-hands meetings * Healthcare coverage * Life insurance * Disability insurance * Time off