For nearly 15 years, the Thrivecast has been one of the most honest voices in the accounting profession about what it actually takes to build and lead a firm. In one of our final episodes, Jason sits down with Grant Niman, founder of Niman & Associates in El Segundo, California — a 45-person firm serving high-net-worth clients, family offices, and the entertainment industry through tax, business management, and estate and trust work.

Grant started the firm in 2008 after decades in the profession, including time at major regional firms and PricewaterhouseCoopers. But when Thriveal came into the picture — discovered by his daughter Lauren, who now serves as the firm’s project manager — Grant was running a 45-person firm the way you run an eight-person firm. Sleepless nights, hands in every barrel, and a head about to explode.

What followed was a multi-year transformation that Grant describes as both uncomfortable and undeniable. Installing an accountability chart, deploying project management, stepping out of manager meetings, and allowing leaders to grow into the spaces he vacated — none of it came easy. Grant admits he pushed back, felt sidelined, and sometimes just wanted to move faster than the work would allow. But the results speak for themselves: their most successful tax season in years, a team that operates as a team, and a firm that kept humming while Grant took three weeks in Southeast Asia with a 16-hour time difference.

This conversation is a rare window into what real firm transformation looks like over time — not a highlight reel, but the full arc. Grant shares what it means to be a heartfelt leader who had to learn to get out of his own way, why he’s building for succession rather than sale, and why, 43 years into the profession, the journey is still very much going up.