Ambrose Employer Group: From startup to a $200M exit

How Disciplined Execution Built One of New York's Leading PEOs

Greg Slamowitz and John Iorillo co-founded Ambrose Employer Group to bring white-glove HR outsourcing to New York's financial and professional services firms. Growth was real — but so was the drama. Like most founder-led companies, Ambrose hit the ceiling where hustle stops scaling: priorities shifted weekly, meetings multiplied without decisions, and the founders were the bottleneck for everything.

Going All-In on the Scaling Up System

• The leadership team adopted the One-Page Strategic Plan, aligning everyone around a shared BHAG and quarterly priorities
• Daily huddles and the full Rockefeller Habits meeting rhythm replaced ad-hoc firefighting with disciplined execution
• Clear KPIs and accountability gave every function a critical number and a single owner
• A Scaling Up coach kept the team honest, quarter after quarter, for eight years

The Result: A $200 Million All-Cash Exit

Eight years after going all-in on Scaling Up, Ambrose reached $20 million in EBITDA and was acquired for $200 million in cash. In Greg's own words: "I credit $100 million of that valuation to Scaling Up and my coach."

• Grew into one of the leading Professional Employer Organizations serving New York's financial services industry
• Reached $20 million in EBITDA with a disciplined, coach-supported execution rhythm
• Exited for $200 million in cash — with half the valuation credited to the Scaling Up system