Sr. Manager, Security Operations California, Santa Clara

Timing is the heartbeat of all electronics, ensuring performance, resilience and scalability. For decades, quartz devices, non-silicon technology, have kept systems in sync, but they struggle in harsher, more demanding environments. MEMS-based Precision Timing delivers greater accuracy, smaller size and resilience. Today, MEMS timing powers over 400 applications, including high-growth ones in AI datacenters, automated driving, industrial and humanoid robots, wearables and IoT.

Our semiconductor MEMS programmable solutions offer a rich feature set that enables customers to differentiate their products with higher performance, smaller size, lower power, and better reliability. With more than 4 billion devices shipped, SiTime is changing the timing industry. For more information, visit: .

Job Summary

Reporting to the CISO, this role leads Security Operations, one of three functions in SiTime's Security Organization. It owns detection and monitoring, the 24x7 managed detection and response relationship, threat hunting, incident response and ransomware readiness — the detect and respond function of the security organization.

This is a build role. The candidate will mature and scale the SIEM and log coverage standard, select and operate the MDR partner, establish detection use cases for the threats that matter to a fabless semiconductor company, and take the incident response and ransomware playbooks from draft to rehearsed.

Detection and response are only as strong as the platforms and data beneath them. The role partners closely with Security Engineering and Vulnerability Management to build SiTime's detection and response platform capabilities, and to enrich log data with the context detections depend on, such as asset criticality, owner, identity, and vulnerability exposure, so that detection coverage is comprehensive and every alert can be acted on quickly.

It is also a people-leadership role. The candidate starts hands-on, then scales the function through a mix of full-time hires, managed service capacity and specialist contractors engaged for surge and testing cycles.

This is an accountable owner role, not an advisory one. The role's core responsibility is to detect, triage, contain, and recover from security threats before they cause material harm to SiTime, and to keep the company ready to respond at any hour. The role partners with IT, Engineering, Legal, and the business, and with the Security Organization's other two functions:

• Security Assurance, whose Security Engineering team deploys and maintains the sensors and platforms this team monitors, whose Vulnerability Management team coordinates the response to critical vulnerabilities and zero‑days, and whose Offensive Security team validates detections through purple team exercises.
• Security Architecture, which sets the logging, monitoring, and data protection architecture that detection coverage is built on.

We value diverse experiences, perspectives, and career paths, and welcome candidates who are excited to contribute to our mission.

Responsibilities:

Detection and Monitoring — SIEM, MDR and Telemetry Coverage

• Own SEIM end to end: design, deployment, priority log onboarding, detection content, tuning, and ongoing cost management.
• Own and enforce a log coverage standard spanning cloud, SaaS, endpoint, network, application and laboratory environments, and close the gaps where coverage does not exist today.
• Manage the 24x7 MDR provider. Own the service levels, the escalation path into SiTime, the quality review cycle and the operating rhythm.
• Build detection use cases aligned to the threats that matter to a fabless semiconductor company, including unauthorized access to and bulk movement of design data and source code.
• Establish alert triage, case management and hand-off workflow between the MDR provider and SiTime Security; measure and drive down time to acknowledge and time to contain.
• Set log retention standards sufficient to support forensic investigation, legal hold and customer or regulatory inquiry.
• Partner with Security Engineering on the coverage, configuration health and alert quality of CrowdStrike, Darktrace, Microsoft Defender and future sensors.

Threat Hunting, Intelligence and Detection Improvement

• Run a threat hunting program, directly and through the MDR provider, focused on the adversary tradecraft used against semiconductor, hardware and intellectual property targets.
• Track threat intelligence relevant to SiTime, including state‑linked activity, and turn it into detection content and hunting hypotheses.
• Map detection coverage to MITRE ATT&CK, and to MITRE ATLAS for AI systems and agents, and close the highest‑risk gaps first.
• Participate in purple team exercises with Offensive Security, and convert every missed technique into a tested detection.
• Provide exploitation and threat signal to Vulnerability Management, and partner on the vulnerability response playbook and tabletop exercises for critical vulnerabilities and zero‑days.
• Produce detection and response metrics that demonstrate risk reduction rather than alert volume.

Vulnerability Management — Risk-Based Operations

• Design and operate a risk‑based vulnerability management program across endpoints, servers, cloud workloads, SaaS, network devices and laboratory systems.
• Define remediation service levels by severity and asset criticality, and drive closure with IT, Engineering and system owners rather than reporting on open counts.
• Own attack surface and external exposure monitoring of internet‑facing assets, and reduce the exposed footprint over time.
• Operate exception handling with risk‑based approval, compensating controls and time‑boxed expiry, in partnership with the Security Risk, Assurance and Trust function.
• Produce vulnerability, coverage and aging metrics that demonstrate risk reduction rather than scan activity.
• Feed vulnerability and exposure signal into the enterprise risk register so it shapes company‑wide prioritization.

Incident Response and Ransomware Readiness

• Own the incident response and ransomware playbooks, and keep them approved, socialized and exercised.
• Deploy and operate paging, the on‑call rotation and escalation, and make sure a real person is reachable at any hour.
• Manage the external incident response and digital forensics retainer, and keep the partner current on the SiTime environment.
• Plan and run ransomware and crisis tabletop exercises for both executive and technical audiences, and track every resulting action to closure with evidence.
• Act as incident commander for security incidents: run the bridge, set the status cadence, and produce the executive reporting.
• Partner with Legal, Communications, Finance and Insurance on notification obligations, crisis communications and claims.
• Run post‑incident reviews and feed the findings back into detection content, controls and the security roadmap.

Qualifications & Requirements:

• 8+ years in security operations, detection and response, or vulnerability management, including 3+ years building or substantially rebuilding a function.
• Bachelor's degree in Computer Science, Information Security, Engineering, or a related technical field — or equivalent practical experience.
• At least one of the following certifications: CISSP, GCIA, GCIH, GCFA, or equivalent.
• People leadership experience.
• Hands‑on experience deploying and operating a modern SIEM, Microsoft Sentinel strongly preferred, including log onboarding, detection engineering and cost control.
• Experience managing an MDR or MSSP relationship, including service level definition, escalation design and quality review.
• Demonstrated ownership of a risk‑based vulnerability management program with enforced remediation service levels.
• Experience leading security incidents end to end, including ransomware scenarios, and designing and running tabletop exercises.
• Experience running threat hunting and mapping detection coverage to MITRE ATT&CK and ATLAS.
• Technical fluency across cloud platforms (Azure, AWS), endpoint, network and identity telemetry.
• English proficiency is required, including the ability to effectively communicate, collaborate, and perform job responsibilities in a professional business environment.

Preferred:

• Experience in a semiconductor, hardware, or other fabless/manufacturing environment, or another regulated hardware/OT‑adjacent industry.
• Hands‑on experience with industry leading security tools and scanner
• Experience monitoring engineering, design and laboratory environments, including intellectual property exfiltration scenarios.

Desired Characteristics & Attributes:

• Strong executive presence and stakeholder management: able to translate complex technical security concepts into business‑friendly, risk‑oriented language and influence decision‑making across functions without direct authority.
• Program management rigor with ablity to run multiple concurrent cross‑functional initiatives to completion, not just track them.

Compensation:

At SiTime, we believe great work deserves great rewards. We offer a comprehensive and highly competitive compensation package designed to attract top talent.

In addition to base salary, this role is eligible for a quarterly bonus tied to the achievement of innovation goals—reflecting our commitment to recognizing meaningful impact. We also offer equity grants, providing a meaningful opportunity to share in the company's future growth and success.

Benefits offered: 401k plan, health and wellness that includes medical, dental, vision, life, parental leave, legal services, and time off plans.

SiTime is an Equal Opportunity Employer . We treat each person fairly and we do not tolerate discrimination or harassment against anyone on the basis of any protected characteristics, including race, color, religion, national or ethnic origin, sex, sexual orientation, gender identity or expression, age, disability, pregnancy, political affiliation, protected veteran status, protected genetic information, or marital status or other characteristics protected by law. SiTime participates in the E-Verify program.

Learn More about SiTime: Review the Get to Know SiTime section of our career page to explore our culture, values, and what makes us unique.