The Rainmaker Genome Project identifies key business development behaviors of top-performing partners in various professional service firms, emphasizing proactive client engagement and strong relationship-building. The study outlines different partner archetypes—expert, confidant, activator, debater, and realist—each with distinct approaches to business development, revealing the widening gap between top performers and average achievers. Recommendations for firms include fostering a supportive culture for 'activator' behaviors, implementing relevant training, and enhancing technology use to optimize business development efforts.