Partner 20, Staff Security Engineer

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 Staff Security Engineer to be a generalist anchor on the Security Engineering team at a16z. We have an internal engineering team (ASG) which operates in the mode of an internal startup and takes on requests from all corners of the firm. You’ll help ASG and the rest of the firm make secure decisions as we ship that tooling, integrate AI across workflows, and operate over a sophisticated cloud surface. You'll partner directly with ASG on the security of our cloud infrastructure, internal applications, SDLC pipelines, and AI systems. The role is hands-on. You'll review code, design controls, automate guardrails, and ship security capabilities across cloud, product, identity, and AI surfaces. You'll work closely with Engineering, SecOps, 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 day