Sr. Support Administrator, IT

SiTime Corporation•Santa Clara, CA

9d•$115,000 - $158,000

About The Position

The Senior IT Support Administrator provides advanced technical support and systems administration for end-user computing environments. The role is an escalation point for complex IT issues and is responsible for endpoint management, identity and access administration, security controls, SaaS platform support, and IT operational processes. It requires a hands-on, security-focused professional who can work independently and collaborate across IT and business teams. The position supports a hybrid identity environment and user lifecycle management, provides advanced support across Windows, macOS, and Linux, and administers Microsoft 365 services. It also supports cloud infrastructure and services in Microsoft Entra and AWS, VMware virtualization, networking, endpoint security, and PowerShell automation. The role contributes to security practices, documentation, process improvement, and knowledge sharing. After-hours work may be needed for maintenance, emergencies, or on-call weekend support.

Requirements

Bachelor’s degree in information technology, Computer Science, or a related field, or equivalent practical experience.
At least 7 years of experience in IT support, systems administration, or a related technical role.
Experience working in a corporate or enterprise IT environment.
Ability to work independently and manage multiple priorities.
Availability for after-hours work as needed for maintenance, emergencies, or on-call weekend support.
Ability to collaborate effectively with overseas and remote teams.
Strong verbal and written communication and organizational skills.
Detail-oriented approach and a proactive, security-first mindset.

Nice To Haves

IT certification.

Responsibilities

Administer and support a hybrid identity environment, including Active Directory and Microsoft Entra ID.
Manage the end-to-end user lifecycle, including onboarding, role transitions, and offboarding, with attention to access controls, compliance, and automation.
Provide advanced support for Windows, macOS, and Linux, and serve as an escalation point for complex operating-system issues.
Diagnose and resolve issues involving laptops, desktops, servers, mobile devices, conference room systems, and audiovisual equipment.
Partner with senior IT and security teams to improve endpoint security and reliability, including EDR, backups, application deployment, and operating-system and software patching.
Administer and support Microsoft 365 services, including Exchange Online, Microsoft Teams, OneDrive, and SharePoint.
Support and troubleshoot Microsoft Entra and AWS cloud infrastructure and services, including virtual machines, identity integrations, networking, and access controls.
Perform advanced network troubleshooting, including IP addressing, DNS, DHCP, VPN connectivity, and related infrastructure issues.
Support, maintain, and troubleshoot VMware environments, including ESXi hosts and vCenter.
Develop and maintain PowerShell scripts to automate administrative tasks and improve operational efficiency.
Promote security best practices, monitor systems, identify risks, and investigate and resolve security-related incidents.
Contribute to documentation, process improvement, and knowledge sharing to improve IT operational maturity and scalability.