Staff & Board

Staff | Board

Staff Team

Executive Director

Karla Hostetler
Karla Hostetler has served as Executive Director of the Mariposa since 2012. Prior to this, she served for 18 years as a consultant strategist and director of arts, trade and development programs for organizations including Aid to Artisans, CNFA, Resortful Arts, UNESCO, the World Bank, Counterpart International, and Koios Associates, living in Central Asia, Haiti, and Antigua and also working in Africa, Latin America, Eastern Europe, and throughout the Eastern Caribbean. A graduate of Colby College, Karla did her graduate work (Masters of Intercultural Management) at World Learning’s School for International Training. She has a Graduate Certificate in Strategic Diversity and Inclusion Management from Georgetown University.

Education Director

Melissa Brooks
The Mariposa welcomes Melissa Brooks to the position of Education Director. Melissa grew up in Peterborough in a multicultural family, attended Keene State, and went on to graduate studies in archaeology and ancient history at Leicester University, U.K. With an M.A. in teaching social studies at Rivier University, and experience in curriculum design and teaching, she is the ideal person to ensure Mariposa education programs meet the needs of educators while inspiring students while expanding outreach offerings for senior centers and other special groups. For more information about Melissa, click here.


Tina Thaing
Tina Thaing began working at the Mariposa in 2005 while still a student at ConVal High School in Peterborough. Serving as Administrative Assistant as she completed her degree in back office management, she was promoted to Administrator in 2015. Tina’s family is Cambodian and she brings her understanding of Southeast Asia as well as her bilingualism and cultural competency to Mariposa exhibits and educational programs.

Associate Curator, Collections Manager

Nadiya Weidman
A native of Ukraine, Nadiya has a background in arts management and she brings both her cultural knowledge of Ukrainian culture and history and her passion for international arts to the challenge of overseeing the Mariposa’s collection of more than 7,500 artifacts from six continents. When she is not at the Mariposa, you will find Nadiya at Andre’s Institute, a sculpture park in the forest of Brookline and an arts education center, which each year hosts emerging sculptors from around the world, under the direction of Nadiya’s husband, sculptor John Weidman.

Volunteer Coordinator

Martha Collins

Gift Shop and Merchandising

Pashya White
Pashya White merchandises the Mariposa’s gift shop, and creates the window displays. She is an artist of the sewing kind who designs and sews wearable art and accessories in her fabric-filled Peterborough studio, and enjoys doing all sorts of custom sewing projects for her clients, from pillow covers, handwoven tops, quilts, and shawls, to passport bags, purses, and sachets.

Web and Email Design and Development

Max Sewell, Tall Pine Design

Marketing and Development

Sam Blair

Board of Directors

Heather Ames, Jaffrey. Heather is the retired Director of Post Adoption Services for Wide Horizons for Children and a board member of Shelter from the Storm in Jaffrey.

David Blair, Harrisville. David is the co-founder of Journeys in Education and the Mariposa Museum; he is an Associate of the Karuna Center for Peacebuilding and an ESL Curriculum Specialist.

Karla Hostetler, Antrim. Karla is the Executive Director of the Mariposa Museum & World Culture Center. See above for bio.

James Kelly, Peterborough. James is a corporate board member of Woodbrowser; a board member of the Low Carbon Enterprise Fund, Peterborough Historical Society, and LaDonna Musicale; and an active member of local business organizations and town committees.

Dottie Morris, Ph.D., Bellows Falls, VT. Dottie is Associate Vice President for Institutional Diversity and Equity at Keene State College. She has previously served as the Associate Dean for Student Learning at World Learning School for International Training (SIT) in Brattleboro, VT, Director of Student Affairs for the Clinical Mental Health Counseling Program at Antioch University New England in Keene, and as a staff counselor at the Colorado State University Counseling Center.

Christine Robidoux, Temple. Christine guides the NH component of the Cyprus Friendship Project.

Mary Vallier-Kaplan, Peterborough. Mary has served as Vice President and Chief Operating Officer at the Endowment for Health; Chair of the Governor’s Commission on Medicaid; Board Member of DentaQuest Foundation and Road Scholar; and Chair of the Monadnock Summer Lyceum Committee. She is an international adoptive parent.

Robert Winterbottom, Stoddard. Bob is a forester and ecologist. Formerly with World Resources Institute, Bob has worked with environmental and sustainable development organizations and initiatives in Africa, Asia, and Central America. He has served as a Peace Corps Reforestation Volunteer in Burkina Faso and as Senior Fellow with EverGreen Agriculture Partnership.

Lou Casagrande, Emeritus, Jaffrey. Lou is former president/CEO of the Boston Children’s Museum and generously shares his experience and expertise with the Mariposa community.