About Horizon3.ai, Inc.

Marketing, IT, HR, Operations, Sales, Finance Jobs at Horizon3Ai

Headquartered in San Francisco, California, Horizon3.ai is a cybersecurity company that develops NodeZero, an autonomous penetration testing platform that continuously discovers, validates, and prioritizes exploitable vulnerabilities across on-premises, cloud, and hybrid environments without requiring human operators. Founded in 2019 by security veterans from the U.S. Special Operations Command, the National Security Agency, and leading cybersecurity firms, the company has raised over $80 million in funding and has conducted more than 170,000 production-safe tests for organizations across industries including finance, healthcare, government, and technology. Horizon3.ai maintains a distributed workforce of approximately 200 to 350 employees, with primary operations in San Francisco and additional teams across the United States and internationally, supported by a leadership team with deep expertise in offensive security and AI-driven attack chaining. The organization structures its teams across key departments including Engineering, Research and Development, Security Research, Sales, Marketing, Customer Success, and Operations, with a focus on continuous innovation in autonomous attack simulation and threat detection. Given its focus on advancing AI-driven security testing capabilities and scaling its platform, the highest concentration of job opportunities is typically found within the Engineering and Research departments--particularly in software engineering, machine learning, and security research roles--with additional positions frequently available in Sales, Customer Success, and Marketing as the company expands its enterprise and government customer base. Below is a list of the latest job openings at Horizon3.ai, where working means contributing to a mission that helps security teams stay ahead of adversaries by transforming how organizations identify and remediate real-world threats.