Doug Dellinger

Doug Dellinger

VP M&A & Corporate Development

Prosperity Partners

Doug Dellinger is Vice President of M&A and Corporate Development at Prosperity Partners. He is responsible for accelerating growth by partnering with leading tax, accounting, and advisory firms nationwide.

He brings more than a decade of transaction experience, including investor roles at two private equity firms and M&A leadership positions at private equity-backed platforms in the healthcare and financial services industries.

Based in Prosperity’s Chicago office, Doug works closely with firm leaders across the country to build partnerships that enhance client service and create new opportunities for growth and team development. He graduated from Duke University and began his career in the consulting group of a Big Four firm.

Featured Sessions

Wednesday, May 20, 2026
12:45 pm

In this moderated conversation, three leaders from Prosperity Partners will share how their firm built a powerful growth engine by focusing on a clearly defined client archetype: entrepreneurs approaching liquidity events who require high-level, strategic tax guidance. They’ll walk through how that early decision to specialize shaped their service model, go-to-market strategy, and long-term trajectory — ultimately fueling more than 20 years of strong organic growth and helping position the firm as a Top 100 player.

  • Identifying a niche requires honest introspection. It’s not merely about the clients you serve today, but the clients you are best fit to serve going forward and where you have a right to win in the market
  • Aligning strategies to acquire clients and the resources to service them requires organizational alignment. You’ll need buy-in from the top down in your firm
  • This path doesn’t require you to always say no to the “wrong” type of client or service, but you probably shouldn’t always say yes either. There are the tradeoffs and a balance you’ll have to strike between specialist and generalist.