Partner 34, Lead, Security Engineering

Founded in Silicon Valley in 2009 by Marc Andreessen and Ben Horowitz, Andreessen Horowitz (aka a16z) is a venture capital firm that backs bold entrepreneurs building the future through technology. We are stage agnostic. We invest in seed to venture to growth-stage technology companies, across AI, bio + healthcare, consumer, crypto, enterprise, fintech, games, and companies building toward American dynamism. a16z has $100B+ under management across multiple funds. We’ve established a team that is defined by respect for the entrepreneur and the company-building process; we know what it’s like to be in the founder’s shoes. We’ve invested in companies like Anduril, Airbnb, Coinbase, Cursor, Databricks, Deel, Figma, GitHub, Roblox, SpaceX, and Stripe. Our team is at the forefront of new technology, helping founders and their companies impact and change the world. The Role We're hiring a Security Engineering Lead to build and shape a16z's security engineering team. This is a hands-on role - you'll spend a real portion of your time in AI security conversations, code reviews, architecture conversations, and the harder build decisions. You'll own application security, enterprise security and cloud security across the firm, and you'll partner closely with our internal engineering organization (ASG) on the security of everything they ship, including the AI tooling that's increasingly central to how the firm runs. You'll report to the Head of Cybersecurity and work day to day with the SecOps Lead, ASG, a16z’s CTO and IT to make security show up as a partner, not a gate. Venture capital firms face targeted, sophisticated threats — capital call wire fraud, social engineering, vishing, and threat actors who specifically pursue firms in this space. Your work protects the firm, our LPs, and our portfolio companies. This role requires an in-office presence 2 days a week in our San Francisco, CA office. To join our team, you should be excited to: Own AppSec and CloudSec ac