MBA Faculty

Tristan Toleno Chair and Academic Advisor: MBA • Managing for Sustainability

  • Work:  Owner, Entera Artisanal Catering; Co-owner, Rigani Wood-Fired Pizza;Vermont State Representative
  • Education:  B.A., Wesleyan University; A.O.S., New England Culinary Institute; MBA in Managing for Sustainability, Marlboro College
  • Classes:  Introduction to Systems Thinking

Tristan has worked in the food-service industry for almost 20 years. For 10 years he was the managing partner and chef of Riverview Cafe, where he employed and supervised more than 400 employees. Prior to that, he trained almost 100 cooks, as he worked his way up the professional ladder to chef. Tristan has also started two new catering companies, Rigani Wood-Fired Pizza, and Entera Artisanal Catering. In January 2013, he began a term  in the Vermont House of Representatives, representing Brattleboro’s 3rd District where he uses his MBA training to advance sustainable social change throughout Vermont.

Tristan’s philosophical commitment to relationship-driven business and community systems is anchored by a willingness to serve. For many years he has been an active volunteer for many local and state organizations, including the Vermont Fresh Network, Landmark Trust, the Healthy Communities Coalition and the Brattleboro Area Chamber. Tristan’s Capstone project was on school food systems and a vision for change in local schools.

Tristan lives in Brattleboro with his wife, Susie, and their two son, Owen and Malcolm.

Bill Baue • Managing for Sustainability

As an internationally recognized expert on sustainability context, online stakeholder engagement, and sustainability communications, Bill Baue designs systemic transformation at global, company, and community levels. A serial entrepreneur, he's co-founder of a number of companies and initiatives, including: Sustainability Context Group, a global community of thought leaders and practitioners who advocate for context-based sustainability; Convetit, an online stakeholder engagement platform; and Sea Change Radio, a globally syndicated podcast on sustainability.

Bill works with organizations across the sustainability ecosystem, including AccountAbility, Audubon, Cabot, Ceres, Climate Counts, GE, Global Compact, Harvard, ICCR, United Nations, Walmart, and Worldwatch Institute. He serves on the Technical Advisory Group of the WWF / WRI / CDP Mind the Science, Mind the Gapinitiative on setting science-based carbon targets. He blogs for Guardian Sustainable Business and Sustainable Brands, where he also co-curates the #NewMetrics Channel. He was named on the Guardian Top 15 Thought Leaders in Sustainable Business and TriplePundit Top 30 Sustainability Bloggers on Twitter lists for his tweeting.

Bill lives in a cohousing community in the Pioneer Valley of Western Massachusetts with his wife Jiyanna and daughters Clara, Emma, and Aoife.


Tim Brennan • Managing for Sustainability

  • Work: Treasurer and Chief Financial Officer, Unitarian Universalist Association
  • Education: MBA, The Wharton School of the University of Pennsylvania

Tim Brennan has served as treasurer and chief financial officer of the Unitarian Universalist Association since 2006, directing the finance department and overseeing the associations combined assets of approximately $400 million. He is a member of the UUA’s Investment Committee, Socially Responsible Investing Committee, the Retirement Plan Committee, the Finance Committee, and the UUA Health Plan Board of Trustees. Tim came to the UUA after seven years with Ceres, the national network of institutional investors working to advance corporate responsibility for the environment. As senior director of development and communications, he worked with major environmental organizations, religious investors, the SRI community, and major pension funds on issues such as climate change and corporate sustainability disclosure. In addition, Tim spent seven years working for a New York investment company and has many years of experience in nonprofit financial management. He currently serves on the board of the Interfaith Center on Corporate Responsibility. Tim holds an MBA from The Wharton School of the University of Pennsylvania. 

Peter Crowell • Managing for Sustainability

Peter is the founder of Context 360, Inc. Prior to founding the company, Peter held senior positions in various Fortune 500 companies. He was the SVP of technology for the McGraw-Hill media companies, CIO of CBS, Inc., president of Chase Access Services, a Chase Manhattan Bank, NA subsidiary, the technology architect for Chase Manhattan Bank, NA, and a partner in CSC Consulting. He started his career as a computer programmer and moved into his first CIO position in 1976.

Pat Daniel • MS Project Management, Managing for Sustainability, MS Managing Mission-Driven Organizations

Dr. Pat Daniel works as a consultant and trainer, supporting corporations and non-profits on organization development, executive coaching, human resource development, strategic planning, communications, and sustainability. She also provides career and life coaching services for individuals.

Prior to her independent practice, Pat served as the associate director of Ceres, a national network of investors and environmental groups working with corporations to address sustainability challenges. She interfaced with Ceres companies, investors and stakeholder groups, and directed the annual Ceres Conference. She played a key role in the development and launch of the Global Reporting Initiative (GRI), and represented Ceres at the U.N. World Summit on Sustainable Development in Johannesburg. As the chief operating officer, Dr. Daniel managed operations, human resources, board relations, and strategic planning during a period when the organization more than doubled in size.

Before joining Ceres, Pat spent 11 years at Polaroid Corporation, where she served as worldwide training manager for Total Quality Management and corporate ethics and compliance. She led a re-engineering effort to enhance and streamline design for the environment and product stewardship, and managed the company’s environmental training. As an internal consultant and coach, she advised executives and employees on organizational and team development.

As a certified professional level Kripalu yoga teacher, Pat has taught yoga and meditation for over 20 years. She has a particular interest in yoga and the natural world, and has written about outdoor meditation for Yoga Journal.  She was the founding editor of the Green Yoga Association newsletter. 

She is the co-founder and managing editor of Engaging Peace, and blogs at

Cheryl Eaton • Managing for Sustainability, MS Managing Mission-Driven Organizations

Cheryl's new business, Wild Genius, offers the same services she has provided through her prior work with Kelliher Samets Volk, such as brand, business, and marketing strategy and consulting, and market research. She said, "It will also allow me to utilize other competencies I’ve developed and delivered for clients, such as: helping organizations, teams and individuals to innovate around the future, and guiding them toward their bold visions."

"Here’s what I’m particularly excited about: providing the quality of thinking and guidance available from a national-caliber firm in a way that is accessible to those individuals and organizations that are doing good for people, communities, and the planet—broadly speaking, those working in the 'sustainability' space.

John Ehrenfeld Faculty Emeritus • Managing for Sustainability

Dr. Ehrenfeld maintains a website and blog devoted to the subject of sustainability. In June 2009 he stepped down as Executive Director of the International Society for Industrial Ecology, after guiding its development since it was founded in 2000. He retired in 2000 as the Director of the MIT Program on Technology, Business, and Environment, an interdisciplinary educational, research, and policy program. Prior to joining the team at Marlboro, he served as an adjunct faculty member at the Bainbridge Graduate Institute. In October 1999, the World Resources Institute honored him with a lifetime achievement award for his academic accomplishments in the field of business and environment. He received the Founders Award for Distinguished Service from the Academy of Management's Organization and Natural Environment Division in August 2000. He spent part of the 1998-1999 academic year at the Technical University of Lisbon as a Fulbright Distinguished Scholar and was Visiting Professor at the Technical University of Delft during the 2000-2001 academic year. He serves on several boards. He is an editor of the Journal of Industrial Ecology, and is author or co-author of over 200 papers, books, reports, and other publications. 

Ben Frost • Managing for Sustainability

Ben Frost is the Director of Public Affairs at New Hampshire Housing, where he coordinates federal and state legislative initiatives and provides direct technical assistance to municipalities to help them develop regulations promoting affordable housing and sustainable development.  He frequently lectures on issues of affordable and workforce housing, planning and zoning law, and ethics.  Ben has over 25 years of experience as a land use planner, and over 15 years as an attorney, practicing primarily municipal law.  He has worked as a Senior Planner with the NH Office of Energy and Planning, the Executive Director of the Upper Valley Lake Sunapee Regional Planning Commission, and as a planner and administrator in local and regional government in New Hampshire and elsewhere in the Northeast.  He has taught Geography at Keene State College and Business Law at Southern NH University. 

 Ben is a member of the Governing Council of Housing Action NH, a low-income housing advocacy organization.  He is a board member of the NH Sustainable Energy Association and he represents New Hampshire Housing on theNH Energy Efficiency and Sustainable Energy Board.  Ben serves on the Executive Committees of the NH Planners Association and the Northern New England Chapter of the American Planning Association.  He is a member of the American Institute of Certified Planners and of the legislative committees of the American Planning Association and the New Hampshire Bar Association. 

Cary Gaunt • Managing for Sustainability

  • Work: Freelance sustainability consultant, currently facilitating/coordinating theHigher Education Working Group of Boston’s Green Ribbon Commission 
  • Education: B.A., Art History with Environmental Studies Concentration, Williams College; M.A., Geography, University of Maryland; Ph.D., Environmental Studies, Antioch University New England; Post-Doctoral Research Fellowship in contemplative approaches to sustainability, Naropa University
  • Classes: Exploring Sustainability

Dr. Cary Gaunt focuses her leadership, management, and academic lens on supporting the cultivation of sustainable and thriving people and places. For more than 22 years she led sustainability and watershed management initiatives as a consultant to governmental and non-governmental organizations under the auspices of JRB Associates/Science Applications International Corporation (SAIC). She built an award-winning team known for developing integrative and innovative solutions to complex environmental/sustainability management challenges. This team, with Cary’s leadership, accomplished leading-edge tasks around the country including preparing one of the nation’s first comprehensive watershed planning guides, facilitating development of Nutrient Trading Guidelines for the Chesapeake Bay, and researching and writing Community Culture and the Environment: A Guide to Understanding a Sense of Place, which was selected by the American Library Association as "Notable Government Document in 2003.” For these and other efforts, Cary was awarded the prestigious Environmental Excellence Award for Project Management by SAIC.

Cary’s government sustainability and watershed consulting work remains core for her even as she broadens her leadership and technical expertise to other arenas such as higher education, where she is currently facilitating the Higher Education Working Group of Boston’s Green Ribbon Commission. This esteemed group of Boston’s leading higher education institutions is charged with developing collaborative approaches to reducing greenhouse gas emissions, expanding sustainability initiatives, and implementing leading edge strategies to address climate adaptation and resilience planning.

Cary has a particular interest in the life journeys, qualities, and practices of successful sustainability leaders who really walk their green talk. Through her extensive consulting career, Cary came to understand firsthand the potentials and limitations of conventional responses to environmental degradation and unsustainable conditions. Many of these stemmed from a lack of effective leadership at personal and organizational levels. She left her management role at SAIC in early 2000 and switched to a consulting status so she could pursue her Ph.D. and focus on the leadership and human behavior dimensions of sustainability.

Cary tries to practice what she researches and teaches. She engages in many nature-based contemplative practices; volunteers as a wilderness rites of passage guide, outdoor educator, meditation facilitator; and supports community environmental committees and local interfaith ecological efforts. Cary supplements her academic sustainability and leadership training with nature-based approaches and has trained as a guide/group facilitator with the Animas Valley InstituteSchool of Lost Borders, Contemplative Outreach, and CDR (Collaborative Decision Resources) Associates. She inhabits the eastern foothills of Southern Vermont’s Green Mountains where she is slowly renovating an older house to be a carbon-neutral and net-zero energy home.

Lori Hanau • Managing for Sustainability

Lori Hanau grew up in New England in an entrepreneurial family that taught her the value of self-reflection, wellness, and caring in fostering wise leadership and healthy, collaborative relationships and environments. She draws on these essential qualities in her work as advisor, facilitator and community builder.

Lori’s early career in business, including presidency of a manufacturing company, offered opportunities to observe and engage in diverse leadership styles and organizational systems. During this time, she began to differentiate between the qualities that support vibrant, sustainable organizations and social ecosystems, and those that lead to dysfunction. In a break from the corporate world, Lori pursued these qualities through an exploration of the service sectors of society, including health, science, philanthropy, spirituality and mission-driven business. Here, she found herself among innovators who were working for all aspects of whole systems change.

In 2002, Lori founded Global Round Table Leadership (GRTL) whose mission is to steward the emergence of a thriving, resilient world through the strengthening of the positive, essential qualities of our humanity. GRTL envisions a world in which individuals and communities come together through the best of our collective humanity for the good of the whole. To this end, GRTL engages people across all sectors in leadership development through the lens of whole systems and in building flourishing relationships with the self, one another and the systems of which we are a part.

Lori is the co-founder of the Mindfulness Practice Center in Keene, NH and acts as Community Builder and faculty member for Marlboro College Graduate and Professional Studies’ MBA program “Managing for Sustainability.” She is also honored to serve on the Advisory Boards for the Southeastern Environmental Education Alliance and Peace Day Live, and on the Board of Directors of the Social Venture Network.

Will Keyser • Managing for Sustainability

Will Keyser is a veteran entrepreneur and business startup counselor, as well as a writer and blogger on entrepreneurship. His company helps people start businesses and was a founder B Corporation. After a career in public relations and advertising he became a management consultant with a major French-based consulting firm, working in the socio-economic field--particularly in public enterprise and employment policy. He later established his own firm and ran it for 11 years before selling it to its 30 staff members for a nominal sum. The company specialized in employment and HR strategy, as well as management development and training. He worked with clients in banking, finance, the oil industry, power generation and distribution, electronics, engineering and food manufacturing.

His recent US startup clients have included a green fashion retailing chain in the Southeast, an online fitness business, a Texas-based group of green cemeteries, a low-tech communication company for the speech impaired and a number of one-person enterprises. His website is a wealth of free material on sustainable startup strategies.

Will has also been a UK government adviser in economic development, on the board of a regional venture capital company, a management association president, and a council member of an employers' federation. He was on the board of the Brattleboro Food Coop (a $16m, 2-store grocery business) and a panel member at the Brattleboro Community Justice Center. He is currently a volunteer horse handler at the Ride On Center for Kids in Georgetown, TX, that improves independence and life skills, in partnership with the horse.

He published eight books books on public enterprise in Europe. His most recent title is the ebook, Telling Startup Stories. Will brings an international perspective having lived and worked in the UK, US and France. He attended the University of Westminster and the London College of Communication in UK, as well as the Universities of Besançon and Lille in France. As a teenager he went to Outward Bound Mountain School and as a 69 year-old went on Outward Bound again, sailing off the coast of Maine. He served as an officer in the British Army Intelligence Corps during military service.

Mark McElroy • Managing for Sustainability

  • Work:  Founder and Executive Director, Center for Sustainable Organizations
  • Education:  B.A., Philosophy, University of Delaware; Ph.D., Economics and Business, University of Groningen
  • Classes:  Foundations of Sustainability in Business
  • Mark McElroy’s LinkedIn profile

Mark W. McElroy, Ph.D. is an accomplished innovator, consultant, award-winning author and educator in the theory and practice of corporate sustainability management. He is particularly well-known for his ideas of tools, methods and metrics for measuring, managing and reporting the sustainability performance of organizations. He is the founder and executive director of the Center for Sustainable Organizations in Thetford Center, VT, and is arguably the world’s leading developer, practitioner and advocate of context-based sustainability (CBS).  CBS is an approach to sustainability management in which performance is tied to specific norms, standards or thresholds for what human impacts in the world must be, in order to be socially, economically or environmentally sustainable. It is unique in the field and is fully described in Dr. McElroy’s recent book, Corporate Sustainability Management – The Art and Science of Managing Non-Financial Performance.

Among Dr. McElroy’s other important accomplishments is his development of the Social Footprint Method, an innovative system for measuring the social sustainability performance of organizations. The Social Footprint Method is the world’s first context-based approach for assessing the social sustainability of an organization. When coupled with context-based environmental methods, the Social Footprint Method makes it possible to fully operationalize the so-called triple bottom line in unprecedented ways.

Dr. McElroy is a 35-year veteran of management consulting, having spent much of that time at Price Waterhouse, KPMG Peat Marwick – where he was a managing partner – and IBM Consulting. More recently, Dr. McElroy led Deloitte Consulting’s Center for Sustainability Performance in Boston, a think-tank he created that was dedicated to the study of sustainability measurement and reporting.

Elizabeth Schmidt • Managing for Sustainability

  • Work: Associate Professor at Vermont Law School
  • Education: A.B., magna cum laude, Princeton University; J.D., Stanford University, where she was a Note Editor for the Stanford Law Review
  • Class: Social and Environmental Enterprises

Elizabeth Schmidt teaches Nonprofit Law and Property at Vermont Law School, and runs a reading group on Social Enterprise Law there. Previously, she taught Nonprofit Law, Family Law, Juvenile Law, Employment Discrimination, Legal Writing, and Legal Skills at the College of William and Mary.

In addition to being a law professor, Professor Schmidt has been a corporate litigator, legal counsel for GuideStar, a manager of educational outreach at Colonial Williamsburg, and a management consultant for nonprofit organizations. At both Colonial Williamsburg and GuideStar, she developed mission-related and revenue-producing programs. As a management consultant, she wrote strategic plans, helped organizations improve governance, guided organizations through transitions, and led seminars on legal and managerial issues facing nonprofits. She also authored several community assessments and helped communities determine how best to meet their goals.

Professor Schmidt has authored articles related to nonprofit governance, accountability, policies, and ethics, as well as a casebook on nonprofit law, Nonprofit Law: The Life Cycle of a Charitable Organization. She has also written about the emerging area of social enterprise.

Marianne Tyrrell • Managing for Sustainability

Marianne Tyrrell is a Global Energy Fellow in the Institute for Energy and the Environment (IEE). Before joining the IEE, Marianne worked as a consultant serving such clients as the British Consulate General, Boston, working on a transportation efficiency innovation project; ICF International, serving as a project manager to U.S. EPA's Smart Growth Implementation Assistance projects; and the Center for Climate Strategies, managing projects and facilitating stakeholder-based state climate action planning processes. Since 2004, Marianne has served as a vice chair for the American Bar Association Committee on Climate Change, Sustainable Development, and Ecosystems.

Marianne served a judicial clerkship with the U.S. Bankruptcy Court for the District of New Hampshire, and served as the editor-in-chief of the Law Review at Widener University School of Law. 

Valerie Voorheis • Managing for Sustainability

Valerie Voorheis is a Lecturer at the University of Massachusetts-Amherst in the Department of Economics and a Visiting Professor at Marlboro College. Val has also held positions at the School for International Training, the Labor Studies Masters Program at UMass, as well as other undergraduate institutions. Her research interests includes household production, gender, labor and discrimination. She has recently been focused on the history of industrial organization and comparative industrial policy. Val lives in Franklin County with her two young daughters and her partner.