Cultural Fit Over EBITDA: How Salas O'Brien Built a 30-Merger Program Without a Single Failure

Nathan Rust, Senior VP of Corporate Development, Salas O'Brien

Salas O'Brien has completed 30+ mergers with a 100% success rate and 93% cumulative leadership retention.

That doesn't happen by accident.

Nathan Rust, Senior VP of Corp Dev, explains the system behind those numbers. He shares how they screen bad fits on the first call, why their CEO meets every employee from acquired firms, and how a founder-driven sourcing flywheel attracts inbound deals.

In this episode: You’ll learn how they screen 200+ opportunities a year down to the ones worth closing, why their initial diligence list is 10 questions, how reverse due diligence works as a real screening tool, and what CEO-led integration meetings mean for retention.

The core argument: Cultural fit isn't a soft metric. Believe it or not, it's the primary filter for deals. EBITDA tells you what you're buying, but people tell you whether it survives.

If you run corp dev at a people-intensive business and wonder why your post-close retention doesn't match your pre-close promises, this episode is for you.

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What You'll Learn

Why retention is one of the most overlooked risks in M&A
How cultural compatibility is assessed during early conversations
Why many buyers damage their reputation by retrading deals
How equity rollovers align incentives between buyers and sellers
Why simplicity in diligence often produces better results
How direct outreach and referrals drive proprietary deal flow
The role of reverse diligence in evaluating buyer credibility

Salas O'Brien is a national engineering firm founded 50 years ago and structured as a supermajority employee-owned company. Approximately 95% of employees own shares. The firm specializes in engineering across industrial, commercial, and institutional sectors, and has built a disciplined M&A program that has completed more than 30 mergers with no failures and 93% cumulative leadership retention across 15 years.

Industry

Engineering and Technical Services

Founded

1975

Website

https://salasobrien.com/

Nathan Rust

Nathan Rust is Senior VP of Corporate Development at Salas O'Brien, an employee-owned engineering firm with approximately 5,000 employees. Over the past three years, Nathan has led or co-led more than 30 mergers, completed a recapitalization with Blackstone as a minority investor, and refinanced debt multiple times. Before joining Salas O'Brien, Nathan held acquisitions roles in the Phoenix area following an MBA from Virginia Tech and an earlier career running a Harley-Davidson dealership.

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