ABOUT ONE CONSTRAINT

The Recovered Banker

35 years in the arena. Turned a $10M-in-the-red agency into $28M profit in 18 months. Survived 2008 from inside an S&P 500 bank — $1.4B in TARP capital, participated in the acquisition of 12 banks while competitors froze. Worked alongside Jack Welch's team at GE, Branson's team at Virgin, Mike Milken on turnarounds.

One thing became clear: every company has ONE constraint that explains a third or more of its performance ceiling. Not ten problems. One structural bottleneck that, once removed, unlocks everything downstream.

Rudiger Merz — Founder of One Constraint, former senior banker and management consultant with 35 years experience

35 years of operating experience

Not theory. Not frameworks from a textbook. Lessons earned in the arena.

Early Career

Accenture & CSC Index

9 years in management consulting. Market strategies, process reengineering, and technology implementation. Worked alongside Wiersema, author of the definitive work on process reengineering.

Digital Era

Genex Turnaround

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.

Agency Leadership

Regional Agency Scale

Grew a regional digital marketing agency from $20M to double the revenue with 20% EBITDA profitability within two years.

Enterprise Tech

Global Clients

Built and expanded P&Ls across the Americas for technology companies. Clients included HP, Disney, Universal Studios, Bank of America, Amgen, and Pfizer.

Banking

Zions Bancorp EVP

EVP of Marketing & Communication for a top-20 bank. Survived the 2008 crisis — $1.4B in TARP capital. Part of the team that acquired 12 banks while competitors froze. Deep knowledge of financial systems and capital markets.

Now

One Constraint

Bringing 35 years of pattern recognition to mid-market professional services firms. One constraint. One diagnosis. One 90-day plan. $2M–$6M+ in economic value unlocked.

Why mid-market professional services firms?

After 35 years across consulting, banking, technology, and agency leadership, the pattern became clear: mid-market 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 deep operating experience, is what makes the Constraint XRay different. We do not guess — we diagnose, quantify, and build the 90-day plan to remove it.

“Intelligence is the ability to get what you want. We make companies more intelligent.”

Take the Constraint XRay

Senior partners

Decades of hands-on leadership. No theory — earned in the arena.

EMEA COVERAGE

Ruud Straat

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.

Netherlands

STRATEGIC FINANCE

Rex Miller

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.

40+ Years Experience

How we operate

Capability, not dependency

We build your team's capability to operate AI systems independently. When we leave, the capability stays. No retainer traps, no vendor lock-in.

Proof, not promises

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.

Arena, not sidelines

We do not hand off decks and disappear. We get in the arena with our clients. We fight alongside the people who build businesses.