Senior IT & Security Systems Admin — Equity & Bonus

SiTime Corp.; Santa Clara (CA); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

401k plan

Equity grants

Health benefits (medical, dental, vis

Parental leave

Time off plans

Job summary

SiTime Corp. in Santa Clara, CA is seeking a Senior IT Support Administrator to provide advanced technical support and systems administration for end‑user computing environments.

You will serve as an escalation point for complex IT issues and own endpoint management, identity administration, security controls, SaaS support, and IT operations. You will manage hybrid Active Directory and Entra ID environments, automate onboarding/offboarding, support Windows/macOS/Linux, and help secure endpoints

Qualifications

• Bachelor’s degree in information technology, Computer Science, or related field, or equivalent practical experience
• Minimum of 7 years of experience in IT support, systems administration, or a related technical role
• Experience working in a corporate or enterprise IT environment
• IT certification will be plus

Responsibilities

• Providing continuous administration and support for a hybrid identity environment—including Active Directory and Microsoft Entra ID—to deliver secure, dependable, and scalable identity services.
• Own the end‑to‑end user lifecycle management process, including onboarding, role transitions, and offboarding, with a focus on access controls, compliance, and automation.
• Provide advanced support for Windows, macOS, and Linux operating systems, serving as an escalation point for complex OS‑level issues.
• Diagnose and resolve issues across a broad range of hardware and platforms, including laptops and desktops, servers, mobile devices, conference room systems, and audiovisual (AV) equipment.
• Partner with senior IT and security teams to improve endpoint security and reliability, supporting technologies and processes such as Endpoint Detection and Response (EDR), backups, application deployment, and OS/software patching.
• Administer and support Microsoft 365 services, including Exchange Online, Microsoft Teams, OneDrive, and SharePoint, ensuring availability, security, and optimal user experience.
• Support and troubleshoot cloud infrastructure and services in Microsoft Entra and Amazon Web Services (AWS), including virtual machines, identity integrations, networking, and access controls.
• Perform advanced network troubleshooting, including analysis of IP addressing, DNS, DHCP, VPN connectivity, and related infrastructure issues.
• Support, maintain, and troubleshoot VMware virtualization environments, including ESXi hosts and vCenter.
• Develop and maintain PowerShell scripts to automate administrative tasks, improve operational efficiency, and reduce manual effort.
• Proactively enforce and promote security best practices, including monitoring systems, identifying risks, and investigating and resolving security‑related incidents.
• Contribute to documentation, process improvement, and knowledge sharing to enhance IT operational maturity and support scalability

Skills

IT support

Systems administration

PowerShell

Security best practices

Education

Bachelor’s degree in IT or related field

Tools

Active Directory

Microsoft Entra ID

Office 365

VMware ESXi

vCenter

AWS

Job description

SiTime Corp. in Santa Clara, CA is seeking a Senior IT Support Administrator to provide advanced technical support and systems administration for end‑user computing environments.

You will serve as an escalation point for complex IT issues and own endpoint management, identity administration, security controls, SaaS support, and IT operations. You will manage hybrid Active Directory and Entra ID environments, automate onboarding/offboarding, support Windows/macOS/Linux, and help secure endpoints