GLEN Program Leader Bios

Here are the facilitators who have been leading GLEN’s Exchanges, Collaborations and Learning Journeys so far. If you are a GLEN member and you are interested in hosting an Exchange, guiding a Collaboration, or developing a Learning Journey, please email us at We have resources available to help you get set up.

Ronita Johnson

Ronita Johnson is an Activist, Artist and Storyteller dedicated to the principles and life practice of circle with a sacred center. She is a pioneer in the field of diversity and inclusion having served as the Corporate Diversity Manager for PG&E in the 80’s and 90’s. She also draws on 40 years of professional experience in Human Resources and Systems Change and decades of experiences with engaging people in transformative action oriented conversations that matter.Ronita wrote and published, “Coming to Forgiveness: A Daughter’s Story of Race, Rage & Forgiveness,” in 2011. She is now producing, writing, and performing her debut her one woman’s show, “FORGIVEable”, an adaptation of her book, this fall.

Gisela Wendling

Gisela Wendling, co-director of The GLEN, has worked for 25 years with a wide range of organizations in the private, public and education sectors focusing on transformation change and learning. Gisela received a doctorate from the School of Human and Organization Development from Fielding Graduate University and was the Director of the Masters Program in Organization Development at Sonoma State University. Her approach is deeply influenced by her immersive experiences with traditional cultures and researching cross-cultural knowledge processes in South America, Southern Africa and Australia.

David Sibbet

David Sibbet, co-director of The GLEN, has been an organizational consultant and information designer since 1977. A pioneer in the visual facilitation field, he is the author of John Wiley & Sons' three-volume Visual Leadership Series as well as many of The Grove's leading-edge group-process tools and models. David is a master facilitator of large-scale group processes, strategic visioning and creative, future-oriented symposia. He holds a master's degree from Medill School of Journalism at Northwestern University and a B.A. in literature from Occidental College.

Rob Eskridge

Rob Eskridge has a passion for companies that know and live their values. He got his start at Procter & Gamble and then learned strategy in his father’s strategic marketing firm, which he eventually inherited. He loves mid-market organizations where leaders are still up close with their employees. His strategic consulting has taken him around the world with a wide range of organizations.

Bill Bancroft

Bill Bancroft is Conbrio’s founder and Principal. He has more than 20 years experience working with organizations in the private, public and not-for-profit sectors on change, including process improvement, strategy, culture, teaming, implementation and communications. A seasoned graphic facilitator, advisor and coach, he specializes in leadership, competencies and succession planning issues.

Amy Lenzo

Amy Lenzo is the founder of the online hosting and consulting company weDialogue. She specializes in utilizing appropriate tools and integrating best practices to support individuals and develop communities, for the purpose of catalyzing deep connection and true collaboration. Amy manages Online Services for the World Cafe and is Director of World Cafe Learning Programs. Her blog is

Alan Briskin

Alan Briskin has spent years studying collective wisdom, from early work with Fetzer Foundation writing about collaborative practitioners, to his subsequent co-authoring of the book The Power of Collective Wisdom and the Trap of Collective Folly. He is a leading voice in the field of organizational learning and development. His blog is

Rachel Smith

Rachel S. Smith is recognized for her expertise in making new technologies approachable through talks, trainings, and written materials. Rachel holds a master's degree in education with an emphasis on educational technology from Stanford University and a bachelor's degree in art education from Florida State University. Her blog is

Malgosia Kostecka

Malgosia Kostecka specializes in creating interactive visual frameworks for group collaboration and strategic visioning. With a background in education and project coordination, Malgosia is dedicated to using creativity to achieve fruitful outcomes. Malgosia holds a bachelor of arts in psychology and fine art from The University of California, Santa Cruz.

Teresa Ruelas

Teresa Ruelas is one of the key volunteers in the core group creating the Cebu Farmers Market. She is also the CEO and Visionary Editor of Nomadic Tales Philippines, Inc. She has done leadership team consulting, co-founded a woman’s network, done executive coaching, and in the 1990s was a Senior OD consultant at Silicon Graphics and Applied Materials in Silicon Valley.

Holger Scholz

Holger Scholz is the founder of kommunikationslotsen, an organization-development firm in Germany. His professional passion is cultivating our natural capacity for facilitating and mentoring as a practical means of working with leaders and organizations. Holger is the author of the Basic Bundle (16 Cards for Natural Facilitators) and co-author of the Learning Maps, which include Open Space, World Cafe, Appreciative Inquiry, Dynamic Facilitation and The Circle Way.

Marc Tognotti

Marc Tognotti has been directing grant making program in Zambia and Zimbabwe for the Tikva Grassroots Empowerment Fund since 2013. Prior to that, he worked internationally for almost 15 years as a large-group process consultant to government agencies and non-profit organizations. Marc is a senior trainer in the acclaimed interpersonal dynamics program at the Stanford Graduate School of Business, where he trains students in relational skills and emotional intelligence. Marc's Ph.D. is also from Stanford, where he studied modern thought and American literature.

Phil Bakelaar

Phil Bakelaar is a professor in the communication department at Montclair State University in New Jersey and a pastor in the Reformed Church in American Company. He is on the Board of the International Forum of Visual Practioners and is a skilled practitioner himself. He has a Ph.D. in rhetoric and communication from Temple University.

Mary Gelinas

Mary Gelinas is a principal at Gelinas James, Inc., and Co-Director of the Cascadia Center for Leadership, now in its 16th year. She has a Ph.D. in organizational development from University of Massachusetts Amherst and is a former Senior Consultant at Interaction Associates. Mary is author of Talk Matters: Saving the World One Word at a Time and sustains an active interest in embodied wisdom practices and neuroscience.

Firehawk Hulin

Firehawk Hulin is co-founder of the Center for Timeless Earth Wisdom, a facilitator of dialogue and ceremony, and an experienced media producer, with an emphasis on video. He is experimenting with bringing Earth Wisdom to the digital realm and is co-leader of the ___TORS, a collaboration exploring what it means for men to Take On Responsible Stewardship.