Our Story

Over the last 30 years, Mary Stelletello has worked in the nonprofit, philanthropic, and corporate sectors. She led five different nonprofit organizations focused on children and youth development, domestically and internationally. Mary began her consulting career in 2007 with La Piana Consulting based in the San Francisco Bay Area.

Mary founded Vista Global Coaching & Consulting in 2010. Vista Global became a certified B Corp in Wisconsin in 2012 and remains the longest certified B Corp in the state. We partner with organizations and individuals to make meaningful change in the world. Mary has worked with more than 200 organizations and individuals in 30 countries across six continents fostering organizational transformation.

Other accomplishments include an International Fellowship in Community Development sponsored by the W.K. Kellogg Foundation and participation in the Salzburg Seminar in Austria on the topic of Engaging Youth in Community Development. Mary co-authored the case study, Success Factors for a Nonprofit Merger and the eBook, Proactively Plan for the Inevitable: A Guide to Leadership Transition and Succession. Mary is a contributor to The Leadership Challenge Activities Book, by James Kouzes and Barry Posner.

Mary holds an MA in Latin American Studies and an MBA in International Management from the University of New Mexico. She received a BA in Political Economics with a minor in Spanish from the University of California, Berkeley. Mary is a PCC credentialed coach through the International Coach Federation, a  Conversational Intelligence coach and an accredited Integrative Enneagram Practitioner. She is proficient in Spanish and speaks some Portuguese.

Mary’s Thoughts on Finding Her Purpose…

My leadership journey began when I was 9 years old, as the first girl to play little league in a town outside Chicago. At age 21, I traveled to Ecuador as a volunteer with Amigos de las Américas. Since then, I have spent time in 12 Latin American countries, deepening my connection to the Latin American culture. My husband and I now spend four months every year living in Oaxaca, Mexico.

My work has led me on paths from the rural areas of Hawaii to the cities of Macedonia and South Africa. I have worked with community-based organizations, multinational corporations, and United States Congressional members. These experiences have shaped the lens that I have on the world and the work that I do

The change we want to see in the world starts with the way adults engage with young people today. Not only do young people need the opportunity to develop and demonstrate their greatness, adults need to build their confidence in young people to lead. My approach to work incorporates both aspects of this audacious social change agenda.



Vista Global collaborates with like-minded organizations committed to using business as a force for positive change in the world. Together, we can have a greater impact within our communities, catalyzing the change we wish to see.



Mary is a certified professional Co-Active coach and is certified in the Integrative Enneagram and Conversational Intelligence®.

The Enneagram framework refers to nine points of view, also known as Types, or styles that reference different perspectives of the way people think, feel and act in relation to the world, others and themselves. It reveals more than a personality profile, as it goes into the often unconscious core motivations. These insights can strengthen your understanding of tensions and possibilities that exist in relationships, teams and organizations.

Conversational Intelligence® is a revolutionary body of work leveraging the power of neuroscience to create profound and lasting transformation for individuals, teams and entire organizational cultures. Combining science and intuition, Conversational Intelligence (C-IQ) aspires to shift our world from I-Centric to WE-Centric and architect Conversational Transformation on a neuro-chemical level.

She is PCC credentialed with the International Coach Federation.  She has completed more than 500 hours of experiential training with master coaches. Mary uses these skills with executives, social entrepreneurs, rising leaders and teams to strengthen their abilities and skills to guide organizations to excellence.


Upcoming Events:

Check back for future events!

Past Events:

January 24, 2024 – WeTheChange Monthly Meeting

November 15 and 16, 2023 – Wisconsin Sustainable Business Council Conference – Madison, WI

Postponed – Next Level Board Leadership – Green Bay, WI

October 23, 2023 – B Local Wisconsin – BLAB with B Lab

June 21, 2023 – YWCA Madison – 2023 Women of Distinction Leadership Awards

June 20, 2023 – B Local Wisconsin – Crash Course in Sustainability 

March 21, 2023 – B Local Wisconsin JEDI Series: Recruitment & Retention for the 21st Century

March 15, 2023 – Gathering Waters Strategic Collaboration Series – Part 2

March 8, 2023 – Gathering Waters Strategic Collaboration Series – Part 1

February 21, 2023 – B Local Wisconsin JEDI Series: Racial Equity & Environmentalism

January 25, 2023 –  3-part Virtual Series: Succession Planning & Leadership Transition – If we were to do it again…lessons learned

January 18, 2023 – 3-part Virtual Series: Succession Planning & Leadership Transition – The Leadership in Leaving

January 11, 2023 – 3-part Virtual Series: Succession Planning & Leadership Transition – Building a Leaderful Organization: An approach to succession planning

September 29, 2022 – Midwest BLocal BLD Conference

September 13, 2022 – Meet the B’s: Wisconsin Certified B Corps Showcase and Happy Hour

June 27, 2022 – Girls on the Run Summit 

June 23-24, 2022 – Wisconsin Association of Family and Children’s Agencies Leadership Institute

February 23, 2022 – Business as a Force for Good: Building Purpose Into Your Business DNA – Virtual Event

May 11th, 2021 – The Neurochemistry of Trust – Conversational Intelligence® – Curiosity, Trust & Authentic Connection – Live Stream!

January 12th, 2021 – Success Factors for a Nonprofit Merger – Webinar 

November 5 & 10, 2020 – Get on the Same Page! – A Guide for Nonprofit Boards on Staff Roles and Responsibilities – Webinar Series 

May 21, 2020 – Iso-Learning Series: Business as a Force for Good: Building Purpose into Your Business DNA