Senior Systems Engineer

About Zscaler

Serving thousands of enterprise customers around the world including 40% of Fortune 500 companies, Zscaler (NASDAQ: ZS) was founded in 2007 with a mission to make the cloud a safe place to do business and a more enjoyable experience for enterprise users. As the operator of the world’s largest security cloud, Zscaler accelerates digital transformation so enterprises can be more agile, efficient, resilient, and secure. The pioneering, AI-powered Zscaler Zero Trust Exchange™ platform, which is found in our SASE and SSE offerings, protects thousands of enterprise customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location.

Named a Best Workplace in Technology by Fortune and others, Zscaler fosters an inclusive and supportive culture that is home to some of the brightest minds in the industry. If you thrive in an environment that is fast-paced and collaborative, and you are passionate about building and innovating for the greater good, come make your next move with Zscaler. 

Our Engineering team built the world’s largest cloud security platform from the ground up, and we keep building. With more than 100 patents and big plans for enhancing services and increasing our global footprint, the team has made us and our multitenant architecture today's cloud security leader, with more than 15 million users in 185 countries. Bring your vision and passion to our team of cloud architects, software engineers, security experts, and more who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy.

The Senior System Administrator will be responsible for designing, implementing, maintaining, and monitoring IT systems and infrastructure to ensure they operate efficiently, securely, and reliably. The ideal candidate will have a strong background in virtualization, storage, monitoring, networking, and Windows/Linux system administration with excellent attention to detail. In this role, you will collaborate closely with IT Security, Networking, HelpDesk, and Application teams to ensure seamless integration of system infrastructure, security measures, and end-user support, aligning technology solutions with organizational objectives. You will be reporting to Manager, IT Network Operations. You will be responsible for:

• Managing and optimizing VMware infrastructure, including vSphere, vCenter, and ESXi, to ensure performance and reliability
• Configuring and maintaining NAS storage solutions, overseeing backups, snapshots, and disaster recovery strategies
• Administering Microsoft Active Directory (AD) for user and group management, GPOs, and managing SSL/TLS certificates using Digicert
• Maintaining DNS and DHCP systems by ensuring proper IP allocation and record updates, while performing Linux/Unix system setup, security hardening, and troubleshooting
• Leading IT infrastructure projects such as system upgrades and migrations, while contributing to network security initiatives like Zero Trust Architecture and upholding compliance with best practices

• Over 7 years of experience in systems administration across Linux and Windows environments, with expertise in infrastructure management, VMware administration, DNS, and Active Directory.
• Proficient in VMware platforms (vSphere, vCenter, ESXi) and Windows Active Directory (user/group management, Group Policy administration).
• Skilled in Linux/Unix system administration, troubleshooting, and automation, as well as NAS storage management, disaster recovery, and SSL/TLS certificate workflows (e.g., Digicert).
• Advanced knowledge of DNS/DHCP administration (e.g., creating and managing records via DNSMadeEasy) along with a solid understanding of networking fundamentals, including routing, switching, and security practices.

• Familiar with cloud technologies such as AWS and Azure, enabling effective management of cloud-based services and infrastructure.
• Strong skills in scripting and automation to streamline system processes and improve operational efficiency.
• Basic understanding of network virtualization and Zero Trust architecture concepts, along with preferred certifications such as VMware VCP, MCSA/MCSE, Linux RHCSA, or CompTIA Security+.

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At Zscaler, we believe that diversity drives innovation, productivity, and success. We are looking for individuals from all backgrounds and identities to join our team and contribute to our mission to make doing business seamless and secure. We are guided by these principles as we create a representative and impactful team, and a culture where everyone belongs. For more information on our commitments to Diversity, Equity, Inclusion, and Belonging, visit the Corporate Responsibility page of our website.

Our Benefits program is one of the most important ways we support our employees. Zscaler proudly offers comprehensive and inclusive benefits to meet the diverse needs of our employees and their families throughout their life stages, including:

• Various health plans
• Time off plans for vacation and sick time
• Parental leave options
• Retirement options
• Education reimbursement
• In-office perks, and more!

By applying for this role, you adhere to applicable laws, regulations, and Zscaler policies, including those related to security and privacy standards and guidelines.

Zscaler is proud to be an equal opportunity and affirmative action employer. We celebrate diversity and are committed to creating an inclusive environment for all of our employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy or related medical conditions), age, national origin, sexual orientation, gender identity or expression, genetic information, disability status, protected veteran status or any other characteristics protected by federal, state, or local laws.

See more information by clicking on the Know Your Rights: Workplace Discrimination is Illegal link.

Pay Transparency

Zscaler complies with all applicable federal, state, and local pay transparency rules. For additional information about the federal requirements, click here.

Zscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled, have long term conditions, mental health conditions or sincerely held religious beliefs, or who are neurodivergent or require pregnancy-related support.