Principal Security Platform Engineer

8+ years of progressive experience in Information security engineering with a focus on cloud/SaaS security, posture management, or attack surface management.

Strong working knowledge of AWS, Azure, and Entra security models; Microsoft 365, Workday, Salesforce, and ServiceNow security configurations a plus.

Proficiency with APIs, Python (or PowerShell) scripting, and integration patterns (REST, webhooks, event‑driven).

Experience integrating security tooling with SIEM/SOAR, ServiceNow, and IAM platforms (SailPoint/Entra preferred).

Advanced to expert knowledge of applicable regulatory and legal compliance obligations, rules and regulations, industry standards, and practices.

Advanced to expert experience in leading cross-functional teams and managing multiple projects simultaneously with an established expertise with the ability to walk-through top-level process design.

As a Principal Engineer I you'll provide SME expertise in your respective domain as well as adjacent domains to ensure solutions are safe, secure, compliant, and reliable.

You'll identify development and support needs as well as take on large and complex design responsibilities supporting project tasks.

You'll also engage with project and business sponsors refining requirements and objectives of targeted solutions.

As Principal Engineer I, you also facilitate dialogue and activities, and work to ensure team collaboration, including teams outside of your domain.

This role is being established as part of the Anthropic/Mythos response to stand up and operate the new SaaS-based defensive tooling the bank is adding to offset Mythos-era risk (e.g., SaaS Security Posture Management, Attack Surface Management, and adjacent cloud/SaaS security platforms).

The Security Platform Engineer will own end to end onboarding, configuration, integration, and ongoing operations of 2–3 new SaaS platforms supporting the CISO Office and will flex into adjacent Mythos workstreams (cloud security hygiene, vulnerability remediation, segmentation tooling) as gaps emerge.

Western Alliance Bank, Member FDIC, is a wholly owned subsidiary of Western Alliance Bancorporation. Serving clients nationwide, Western Alliance Bank includes six legacy bank brands — Alliance Association Bank, Alliance Bank of Arizona, Bank of Nevada, Bridge Bank, First Independent Bank and Torrey Pines Bank — that remain part of the company’s heritage, as well as AmeriHome Mortgage, a Western Alliance Bank Company.

Western Alliance Bancorporation is committed to equal employment and will consider all qualified applicants without regard to race, sex, color, religion, age, nation origin, marital status, disability, protected veteran status, sexual orientation, gender identity or genetic information. Western Alliance Bancorporation is committed to working with and providing reasonable accommodations for individuals with disabilities. If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process and/or need an alternative method of applying, please email

HR@westernalliancebank.com

or call 602-386-2488.  When contacting us, please provide your contact information and state the nature of your accessibility issue.  We will only respond to inquiries concerning requests that involve a reasonable accommodation in the application process.

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