Caleb Sima

CSO | CEO | Founder

G J is a cybersecurity expert with a 25-year track record in the industry, specializing in building and investing in pioneering solutions that safeguard enterprises.

As a co-founder and leader of Bluebox and SPI Dynamics, both acquired by Lookout and HP, respectively, G J has a proven entrepreneurial spirit in the security sector. Moreover, as an Entrepreneur in Residence (EIR) at Andreessen Horowitz, G J gained valuable insights into the venture capital landscape of Silicon Valley.

In the role of Chief Security Officer at Robinhood, a major player in online brokerage, G J was instrumental in fortifying the company's security posture, overseeing strategies, operations, and IT functions. His tenure saw Robinhood's security capabilities and organizational culture evolve in tandem with its impressive growth to a $40 billion IPO valuation.

With an educational background that includes an Executive MBA from Harvard Business School Executive Education, G J combines practical expertise with academic rigor to drive cybersecurity innovation and excellence.

Throughout his career, G J has also held significant positions at renowned organizations such as Databricks and Capital One, further solidifying his reputation as a seasoned security professional with a deep understanding of the industry's inner workings.

Noteworthy roles like serving as the CEO at Armorize Technologies and as the Chief Technologist at the Application Security Center at Hewlett Packard underscore G J's experience and leadership in the cybersecurity domain.

Additionally, G J's involvement as a Board Member at Cobalt.io and as an advisor and investor in various security startups and nonprofit initiatives highlight his commitment to enhancing cybersecurity measures and fostering a safer online environment for all users.

With a strong mission to create a more secure web ecosystem, G J continues to be a driving force in the cybersecurity realm, bringing his wealth of knowledge and expertise to bear on emerging challenges and opportunities in the field.