Julie Tsai is a CISO-in-Residence at Ballistic Ventures. As a seasoned cybersecurity leader with over 20 years of experience driving security and engineering excellence across Silicon Valley, she has held key roles at companies ranging from lean startups to Fortune 1 enterprises, building and scaling security programs that are deeply integrated with engineering and DevOps practices. Companies include Roblox, Box,and Walmart.

With a foundation in full-stack technology—including system administration, network architecture, site reliability engineering, and application development—Julie brings a rare depth of technical expertise to her security leadership. Her work emphasizes DevSecOps, modern security architecture, organizational design, and building resilient, inclusive security cultures.

Julie was recognized by SC Magazine as an “IT Security Woman to Watch,” VPNRanks as a Top 10 California CISO 2024, and she frequently speaks at industry conferences on topics such as microservices security, cloud transformation, and career development in cybersecurity. She is a passionate advocate for civil liberties, open technologies, and using security as a force for good.

Julie holds a degree from Stanford University and is known for bridging technical rigor with strategic vision—driving security initiatives that empower both organizations and the people behind them.