Bill Derrenger and Claudia Tecglen

Clarentia's Story

At Clarentia, we believe in leadership as a service and are committed to fostering clarity and accountability in corporate governance. Our values guide us to empower teams to make informed and ethical decisions.

From Executive Insight to Advisory Excellence

Beyond the CEO: Meet Bill Derrenger

After 35 years in executive leadership at global companies like Kellogg's, PRISA Group, Clear Channel, Osborne, and Lipco Foods International I realized something powerful: success in the C-suite doesn’t guarantee success in the boardroom.

Advisory leadership is a different game—one that requires presence, perspective, and the ability to influence without control.

At Clarentia, we’ve made that shift ourselves. We know what it takes to move from operator to advisor—and what companies truly need from their boards today. Our mission is to bridge that gap and elevate both sides of the equation.

Bill Derrenger
Core Values

Our Guiding Principles

At Clarentia, leadership is lived with intention. These five principles are the foundation of how we support advisors and organizations alike.

People + AI = Smarter Leadership

We believe leadership is enhanced -not replaced- by technology. Our work balances human insight with intelligent tools to drive clarity, agility, and impact.

Purposeful Stewardship

We support leadership that serves with purpose. Whether guiding organizations or advisors, we prioritize long-term vision and responsible influence.

Excellence in Every Step

Precision, strategy, and professionalism are at the heart of what we do. Every interaction is crafted with care and driven by meaningful outcomes.

We Walk Beside You

We walk beside our partners —not ahead of them. Our partnerships are built on dedication, reliability, and a shared pursuit of growth and integrity.

Discretion builds trust

We honor the sensitivity of every conversation. Quiet leadership often drives the most meaningful change—and we treat trust as a non-negotiable

Contact us at
Our team

Meet the professionals behind Clarentia

Maria Eugenia del Barco

Maria Eugenia del Barco

Organizational Experience and Engagement Lead
Aurelia Gigena

Aurelia Gigena

Strategic Relations and Institutional Coordination Lead
Patricia Slupsky

Patricia Slupsky

Strategic Processes and Operational Efficiency Lead

Frequently Asked Questions (FAQs)

We partner primarily with family owned and private equity backed multinational businesses, as well as values-driven companies seeking strategic leadership support and board development.

We don’t operate as recruiters. Instead, we support leadership evolution—facilitating meaningful connections, governance, and long-term alignment between executives and organizations.

Through in-depth analysis, customized support plans, and trusted partnerships. We reinforce leadership capacity, enable cohesive decision-making, and help organizations scale with purpose.

For experienced executives seeking to begin or consolidate their participation on boards, from a position of trust and strategic leadership. We also support organizations that wish to strengthen their governance, empower their leadership teams, and develop boards committed to creating value and advancing sustainability.

We guide you through every stage—from opportunity evaluation to boardroom readiness—ensuring you have the strategic clarity, peer support, and governance knowledge to succeed.

Contact us. Whether you are leading an organization or exploring becoming an advisor, we start with a conversation based on your goals and values.

Discretion is foundational to our process. We safeguard sensitive information and treat every engagement with professionalism and integrity.

Yes, our network is international.

Do you have any further questions?

Can't find what you need? We are here to help you. Contact us and we will get back to you as soon as possible.

Contact us at

Together, we take the first step towards your success

Ready to lead, advise, or transform? Wherever you are on your path, we’re here to walk it with you.