Senior Security Architect — AI & Cloud Strategy

ADP, Inc.; Santa Clara (CA); On-site; USD 155,000 - 221,000; Full time

Job summary

SiTime is the Precision Timing company, located in Santa Clara, CA, seeking a Sr. Principal, Security Architecture to own the target-state security architecture across identity, data, endpoints, networks, cloud and SaaS.

This build role partners with IT Engineering, Design and the CISO's team to ensure security is designed in from the start. Reporting to the CISO, you will set control baselines by environment and drive security design reviews for new systems, including AI integration, while

Qualifications

• 8+ years in information security, including 5+ years in a dedicated security architecture role.
• Bachelor's degree in Computer Science, Information Security, or a related technical field — or equivalent practical experience.
• At least one of the following certifications: CISSP, CCSP, or a major cloud security architecture certification.
• Deep architecture experience across identity, data protection, cloud (Azure, AWS), network segmentation and endpoint.
• Demonstrated experience setting control baselines and running security design review at enterprise scale.
• Working knowledge of NIST CSF, NIST SP 800-53 and ISO 27001 as architecture inputs.
• Proven ability to influence engineering and business decisions without direct authority.
• English proficiency is required, including the ability to effectively communicate, collaborate, and perform job responsibilities in a professional business environment.

Responsibilities

• Define the target-state security architecture across identity, data, endpoint, network, cloud and SaaS.
• Set minimum control baselines by environment and risk tier — corporate, engineering, laboratory, test, cloud and OT-adjacent.
• Design segmentation and ingress/egress enforcement for laboratory and engineering networks.
• Architect the protection model for design data, including compartmentalization and role-based separation between design disciplines.
• Own security design review for new systems, platforms and major changes, or require compensating controls with a defined expiry.
• Produce reference architectures and reusable patterns without needing a bespoke review every time.
• Be the security architect for the Head of AI and team.
• Define security architecture for sanctioned AI use: data boundaries, model/agent access, tenancy, logging and monitoring.
• Set architecture for data classification, protection and loss prevention across endpoint, email, collaboration, cloud and AI tooling.
• Evaluate emerging technology and establish SiTime's position before business adoption outpaces the controls.
• Partner with Security Engineering so architecture decisions land as deployed, measurable configuration rather than documents.
• Define security architecture and control requirements for outsourced assembly and test partners and other supply chain connectivity and data exchange.
• Support market-access requirements, including EU Cyber Resilience Act, NIS2, and CMMC where contractually triggered.
• Provide architecture input to customer security audits and the reusable trust package.
• Provide technical security review of vendor, platform and cloud service selections before commitment.

Skills

Information security

Security architecture

Cloud security

Identity and data protection

Network segmentation

Stakeholder management

Communication

Education

Bachelor's degree in Computer Science, Information Security, or related field

Job description

SiTime is the Precision Timing company, located in Santa Clara, CA, seeking a Sr. Principal, Security Architecture to own the target-state security architecture across identity, data, endpoints, networks, cloud and SaaS.

This build role partners with IT Engineering, Design and the CISO's team to ensure security is designed in from the start. Reporting to the CISO, you will set control baselines by environment and drive security design reviews for new systems, including AI integration, while