WorldBoston Staff


Mary Yntema
President & CEO


Joining our team in May 2014, Mary brings to WorldBoston extensive international experience combined with nonprofit sector and management expertise. Prior to WorldBoston, Mary worked as a consultant on nonprofit governance. She has served as interim executive director of the Boston Center for Community and Justice, executing a historic program merger with YWCA Boston; as executive director of the Courageous Sailing Center of Boston; and as founding executive director of United Way Moscow, where she resided for eight years. Her corporate experience includes institutional equity sales at Brunswick UBS Warburg and Pioneer Securities and running a sales department as vice president of the Center for Business Skills Development, all in Moscow.

Mary is a member of the board of MassEquality and has served as a volunteer on the boards of United Way Moscow, the International Center for Not-for-Profit Law, the Brattle Film Foundation, and the Boston Center for Community and Justice.

Mary holds an A.B. from Harvard University, an M.A. from The Johns Hopkins School of Advanced International Studies and an M.B.A. from Columbia Business School, and is a BoardSource Certified Governance Trainer.


Sarah Sibley
Director, Citizen Diplomacy Programs


Sarah joined the WorldBoston team in January 2016, overseeing WorldBoston Citizen Diplomacy programs, including the International Visitors Leadership Program.

Recently returned to the U.S. and her hometown of Plymouth near Boston, Sarah worked and studied in the United Kingdom and Morocco for the last five years.  In London, Sarah spent three years running child protection projects for vulnerable children and their families in Morocco with the Moroccan Children’s Trust (MCT), and also working in management and operations with its sister organization, Community Action for Refugees and Asylum Seekers. Sarah then joined the MCT team in southern Morocco as its sole delegate responsible for in-country coordination and development of its child protection and international volunteering projects

Sarah holds a B.A. from the College of William and Mary in International Relations, and an M.A. from Queen Mary, University of London in International Development.  She speaks French and intermediate Standard and Moroccan Arabic.     


Jenna Bergquist

Special Programs Coordinator



Jacob Lensing-Sharp

Program Coordinator, Operations and Global Education Programs




Zoe Bowers

Program Associate



Jim Moore

Program Coordinator, Fulbright


 Cathy has been at WorldBoston since January 2017 and is originally from the San Francisco Bay Area. She is currently a Program Coordinator for WorldBoston's IVLP programs, and has programmed for over 17 groups & 119 visitors (and counting!)-- ranging from a variety of topics including special needs education, immigration, entrepreneurship, American libraries, higher education, U.S. Foreign Policy, judicial reform, and even niche topics such as pediatric palliative care.      Cathy is currently pursuing her Bachelors degree in International Affairs at Northeastern University and is minoring in Cultural Anthropology. She is a scuba diver, and has had the privilege to study abroad in Greece, the United Kingdom, Serbia, Bosnia-Herzegovina, and Switzerland. 

Cathy Tripp

Program Coordinator




Lorraine Goldstein

Membership & Communications



Sabrina Schick

Program Associate