Principal Security Engineer Jobs in California

51 open Principal Security Engineer jobs in California at 29 companies, including Cisco, Salesforce and Palo Alto Networks. Updated daily from company career pages.

Cisco

Cisco develops, manufactures, and sells networking hardware, telecommunications equipment, and other technology services and products.

Salesforce

Datorama is a marketing intelligence platform that transforms the way marketers optimize their marketing performance.

Palo Alto Networks

7 more open roles at Palo Alto Networks

Atlassian

Hewlett Packard Enterprise

Hewlett Packard Enterprise is an edge-to-cloud company that uses comprehensive solutions to accelerate business outcomes.

Qualcomm

Qualcomm designs, manufactures, and markets digital wireless telecommunications products and services.

Micron Technology

Micron Technology is a semiconductor company that produces DRAM, SDRAM, flash memory, SSD and CMOS image sensing chips.

IonQ

IONQ develops general-purpose quantum information processors to solve the world’s complex problems.

Graphcore

Graphcore develops a microprocessor designed for AI and machine learning applications.

OpenAI

OpenAI is an AI research and deployment company that conducts research and implements machine learning.

SpaceX

SpaceX is an aviation and aerospace company that focuses on reducing the costs associated with space travel by using reusable rockets.

Datadog

Datadog offers monitoring and analytics for cloud-based workflows.

Zscaler

Zscaler is a global cloud-based information security company that enables secure digital transformation for mobile and cloud.

Freshworks

Freshworks is building and delivering online cloud-based software-as-a-service that provides helpdesk support with automation solutions.

Fastly

Fastly helps digital businesses keep pace with their customer expectations by delivering secure and online experiences.

Bank of Montreal

Bank of Montreal is a financial services provider of retail banking, wealth management, and investment banking products and solutions.

Live Nation

Lending Club

Lending Club is an online financial community that brings together creditworthy borrowers and savvy investors.

Axon

Axon provides electronic control devices to law enforcement and corrections agencies.

Block, Inc.

Block, Inc. (NYSE: SQ) (formerly Square, Inc.) is a technology company with a focus on financial services.

Updated 2026-10-11.