35 years in the arena. From Accenture to Genex to Zions Bancorp. From management consulting to turning around a $10M loss into $28M profit in 18 months. From Wall Street to Main Street.
Rudiger Merz has seen the patterns that kill companies — and the single constraint that, when removed, unlocks everything.
Not theory. Not frameworks from a textbook. Lessons earned in the arena.
9 years in management consulting. Market strategies, process reengineering, and technology implementation. Worked alongside Wiersema, author of the definitive work on process reengineering.
Turned the LA office from a -$10M annual loss to $28M profit in 18 months. Led teams of 180 people. Sold projects to GE ($100M), Virgin Group ($250M), and Delta Airlines ($50M). Helped take the company public.
Grew a regional digital marketing agency from $20M to double the revenue with 20% EBITDA profitability within two years.
Built and expanded P&Ls across the Americas for technology companies. Clients included HP, Disney, Universal Studios, Bank of America, Amgen, and Pfizer.
EVP of Marketing & Communication for a top-20 bank. Survived the 2008 crisis. Part of the team that acquired 12 banks. Deep knowledge of financial systems and capital markets.
Bringing 35 years of pattern recognition to CPA firms. Combining financial engineering expertise with AI transformation. The Critical Constraint Method is born.
After 35 years across consulting, banking, technology, and agency leadership, the pattern became clear: CPA firms between $10M and $100M are sitting on massive untapped potential. They have the clients, the expertise, and the revenue — but one hidden constraint is preventing them from scaling without burning out their partners.
I can go toe-to-toe with any CFO on reading financial statements and understanding what the numbers actually mean. That financial fluency, combined with AI transformation expertise, is what makes the ROCE framework different. We do not just automate — we prove the return on every dollar invested.
“Intelligence is the ability to get what you want. We make companies more intelligent.”Start the conversation
Decades of hands-on leadership. No theory — earned in the arena.
Senior Partner
Based in the Netherlands, Ruud extends One Constraint's reach across Europe, the Middle East, and Africa. His international perspective brings a global lens to constraint identification and AI transformation for firms operating across borders.
Senior Partner
With 40+ years of experience as CFO of midsize companies, Rex is a seasoned strategic advisor on all matters of financing. His deep financial acumen complements the ROCE framework, ensuring every recommendation is grounded in real-world capital discipline.
We build your team's capability to operate AI systems independently. When we leave, the capability stays. No retainer traps, no vendor lock-in.
Every engagement ends with measurable ROCE. We show the financial return on every dollar invested. If we cannot prove it, we do not claim it.
We do not hand off decks and disappear. We get in the arena with our clients. We fight alongside the people who build businesses.