Bunnell Idea Group (BIG) was founded by Mo Bunnell, an actuary who learned through trial and error what many partners discover too late. Technical excellence alone doesn't build a book of business.
After realizing there was no playbook for this critical skill, Mo created BIG to give professionals what he never had: a comprehensive, science-backed system for winning work, growing their book of business, and deepening their relationships.
Today, BIG is the leading business development training, coaching, and consulting firm for professionals with deep expertise who also need to grow client relationships. Our comprehensive GrowBIG® Training system covers 17 modules teaching every aspect of business development, from fostering new relationships to deepening existing ones to leading growth-focused teams.
The methodology is backed by over 130 peer-reviewed behavioral science studies, proving that growth skills aren't innate, they're learnable.
We've trained over 60,000+ professionals at over 400 organizations worldwide, including the most prestigious law firms, accounting firms, consulting firms, and professional service organizations on the planet.
Partners and associates alike use our system to transform from reactive service providers to proactive relationship builders.
The core insight: anyone can learn this. Science + steps = success.
Whether you're early in your career or leading a practice, the GrowBIG® system meets you where you are and gets you where you want to go.
