A handbook for new security directors and personnel, particularly within high-growth companies, outlines strategies to effectively manage and evolve security operations. The guide emphasizes managing risks, adopting proactive change management and conducting diverse security assessments. It underscores the need for establishing a security-focused culture through developer training, learning from mistakes, and rewarding security consciousness. It further endorses the need for continuous security to build software your customers will trust. A bug bounty program is a strong component of a security strategy that can provide continuous testing at scale (although it's best to start small and scale up as you learn to manage it). The handbook equips security leaders with robust tools and strategies for staying on top of your attack surface to reduce cyber risk.