In Mastering the Relationship Business, Eng shares the real-world lessons learned through a decade of struggle, failure, and quiet wins — building a sales career not on tricks, but on building lasting relationships. This isn’t just a guidebook. It’s a mindset shift. A practical, story-driven path to becoming the kind of salesperson people actually want to work with.

“You don’t have to be pushy

to be Powerful in Sales” 

David Eng is an author and top-performing sales professional, but he definitely didn’t grow up dreaming of a career in sales - and he definitely didn’t start as a natural. With no industry connections, no formal sales training, and nothing but a biology degree and a willingness to fail forward, he began his career in the bottom 5% of performers out of 2500 sales reps. Over time —and through thousands of hard conversations — he built a business from scratch that now serves hundreds of families and manages hundreds of millions in assets.

His success didn’t come from memorized scripts or high—pressure tactics. It came from learning how to build trust, earn credibility and treat every conversation like a relationship — not a transcaction.

Today, David mentors advisors, speaks on ethical selling and writes to help reshape what it means to succeed in sales in the modern world: not by being the loudest in the room, but by being the most real.

A young man in a white T-shirt is speaking into a microphone while making a hand gesture during an interview or conversation in a room with large windows.