About / Our Team

Expert practitioners and
active pioneers

At Dialogos, our continued success and effectiveness ultimately comes down to an extraordinary group of practitioners who bring a broad range of life experience and expertise to every engagement.

William Isaacs
Bill is Founder and President of Dialogos and the author of Dialogue and the Art of Thinking Together (Doubleday). He is a leading authority on collective leadership, the design and development of organizational learning, and the practice and theory of dialogue. For more than 30 years he has consulted to senior leaders of prominent organizations around the world. Read more

Skip Griffin
As a Senior Associate at Dialogos, Skip consults with corporations and teams to assist them with effective strategies and the capacity to think together. Skip has a significant background in civil rights, community organizing, and community education initiatives. Read more

Peri Chickering
Peri Chickering, PhD (Coach and Senior Consultant) has a diverse range of skills and experience, including executive leadership, coaching, teaching, training and program development, and administration. As a Director and Senior Consultant for Dialogos over the last nine years, Peri has worked with a diverse range of clients in both the government and private sector including British Petroleum, Renaissance Reinsurance, World Bank, International Finance Corporation and the US Forest Service (USFS). Read more

Kate Isaacs
Dr. Kate Isaacs is a Dialogos consultant who does research and consulting on multi-stakeholder collaborations and corporate strategies that foster global sustainability and human flourishing. She focuses on large-scale organizational change, leadership development, and strategy consulting. Clients include BP, the World Bank, the International Finance Corporation, the US Forest Service, and Aspentech. Read more

Tristan Jackson
Tristan joined dialogos in 2015 as consultant and VP of Business Development, where he is leading the expansion and scaling of new and/or high-growth opportunities. Tristan also coaches executive-level clients, facilitates team-level engagements, and manages technology development projects. Read more

Alper Tengüz
Alper is an executive coach and organizational consultant focused on helping individuals and teams develop the leadership capabilities to solve their greatest challenges. He resides in Istanbul, Turkey and has coached and consulted executives from the US, Western and Eastern Europe, the Middle East, and South and East Asia. Read more

Cliff Penwell
Cliff has over 25 years of experience as a master facilitator, consultant, mediator and teacher. For the past 15 years he has specialized in facilitating change processes and offering leadership training in diverse environments. Read more

Beth Farb
Beth is an organizational consultant and coach who works collaboratively with businesses, educational institutions, and not-for-profit agencies to develop long-term sustainable change through problem intervention, reorganization, planning and development. Read more

Glennifer Gillespie
Glennifer leads the Dialogos coaching program and provides supervision for Dialogos coaches. She is an organizational development practitioner with over 20 years of experience specializing in organizational learning, coaching, effective team function and dialogue, and women’s leadership. Read more

Cees Kramer
Cees is the Director of Dialogos Europe and brings a wealth of experience gained during his 30-plus-year international career with a global energy company and Dialogos. His primary interests are leadership development and team dynamics with a specific focus on integrating dispersed systems and aligning teams across boundaries. Read more

Bradley Chenoweth
Bradley is an organizational learning and development consultant, dialogue facilitator, and mediator. He enables leadership groups to develop their knowledge of each other and create new ways of doing business. Read more

David Miller
David teaches, coaches, facilitates and consults with leaders and leadership teams to build their capacity to effect creative change. His work with leadership teams is focused on learning, defining personal and organizational values, articulating strategic priorities, and making effective decisions. Read more

Sarah Rozenthuler
Sarah is a Senior Dialogos Associate with over 10 years experience as a consultant. She is a professional psychologist with an in-depth understanding of how an individual can become a psychologically integrated leader. Read more

Ayalew Zegeye Asfaw
Ayalew is a Dialogos associate. He is based in Addis Ababa, Ethiopia and is the coordinator for initiatives and activities of Dialogos in Africa. He is founder, general manager and principal consultant of AMDAMU Management Consultancy, founded in 1998. Ayalew focuses on strategy and leadership development as well as facilitation of different processes. Read more