Grey Matter Partners
Grey Matter Partners is a senior advisory practice. We work with leaders and boards facing decisions they have not faced before: CEOs under activist pressure, boards navigating succession, founders scaling through a labor market that keeps changing the rules, senior teams inside companies being reshaped by capital events they did not initiate, and executives in transition trying to understand what their experience is worth in a market that is rewriting the rules for senior work.
The craft is twenty-five years old. The conditions are not.
Covid reset assumptions about work, motivation, and leadership that had held for a generation. The balance of leverage between employees and employers flipped twice in four years. No one has run an organization through a whipsaw that sharp and come out with instincts they fully trust. The architecture of globalization is being renegotiated in real time. AI is displacing capital and labor at the same time, and the returns are moving in ways the old models do not describe.
At the top of the organization chart, the weather is especially turbulent. CEO turnover reached a fifteen-year high in 2025, with even top-performing executives being replaced at nearly double the prior rate. Boards are under unprecedented activist pressure and refreshing too slowly to relieve it. Take-private activity climbed 44 percent year over year, reshaping the senior talent market at a pace not seen in decades. Each of these transitions is a decision being made by leaders who have never faced exactly this combination of conditions before.
Most of the tools they were handed were built for a different cycle. Ours are being built for this one.
We have built the firm we wished existed.
The craft of advising senior leaders used to be a relationship business built on judgment, discretion, and hard-earned pattern recognition. Somewhere in the last decade it became a category business built on frameworks, platforms, and scale. Both things can coexist. We are on the side of the craft, and we built Grey Matter to be the place that craft could live.
We publish our methods.
The psychometrics we use are as rigorous as anything in the category. We publish them. The items are in the open, the norms are shared, and anyone who wants to use them can. Quality should rise on its own merits, and we have more confidence in the conversation than in gatekeeping the instruments. The firm competes on judgment, not on access.
On AI, our view is in writing.
We have published on AI at some length. The short version: the marketing has gotten ahead of the evidence. The longer version is in a recent paper on AI capital displacement.
We are good citizens of this industry.
We have strong opinions about how things should change and we say them out loud. That is different from being hostile to people who are doing the work honestly inside the current system. We want the whole category to get better. We want the instruments to get sharper, the conversations to get harder, and the serious practitioners on every side of the market to have more leverage. We are happy to be wrong in public if it moves any of those things forward.
Robert Tucker
Founder & Managing Partner
Rob Tucker is the founder and managing partner of Grey Matter Partners and the author of Pax Americana. He has advised senior leaders across more than two hundred organizations on six continents, including the largest hostile defense in tech history, Fortune 10 CEO transitions, and multi-year regulatory campaigns. His doctoral work at USC's Annenberg School examined how non-technical decision-makers act in the context of rapidly evolving science and technology. He lectures frequently on the future of technology, finance, and the forces reshaping senior work.
David O'Brien
Director
David O'Brien is a director at Grey Matter Partners. Before joining the firm, David served in the British military including special operations, completing operational tours in Kosovo and the Middle East. He brings two decades of experience leading teams in high-consequence environments where clarity, composure, and accountability are not abstractions but operational requirements. David works directly with leaders at all levels to sharpen decision-making, strengthen operating discipline, and close the gap between potential and performance.
Andrea Waddell
Director, Client Relations
Andrea Waddell is a director at Grey Matter Partners. She manages client intake and engagement coordination, and maintains her own advisory practice within the firm focused on discrete, high-trust counsel to high-net-worth individuals navigating complex personal and professional situations. Her career was built on reading people accurately, maintaining absolute confidentiality, and operating in environments where trust is the only currency that matters.
Brian H. Spitzberg, Ph.D.
Senior Advisor, Measurement & Assessment
Brian Spitzberg is one of the world's leading authorities on the measurement of human competence. Over a four-decade research career, he has published more than two hundred scholarly works across interpersonal communication, conflict, risk assessment, and the assessment of leadership, team, and relational performance under pressure. His research has shaped how serious organizations evaluate the behaviors that matter most, and it is the foundation on which Grey Matter's instruments are built.
Beyond the core team and senior advisors, Grey Matter maintains relationships with dozens of senior practitioners who work with us on a case-by-case basis. Former operators and executives. Military leaders. Journalists and editors. Connectors with unusual access to specific industries, geographies, and institutions. When a situation calls for a particular kind of expertise or a particular kind of door, we know who to call. These relationships are private, and the people behind them prefer it that way.