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Our Team


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.

Thomas Luly

Manager of Operations and Global Education Programs



Prior to joining the WorldBoston team, Thomas was a program coordinator with the MIT Skoltech Initiative, a collaboration between MIT and the Skolkovo Institute of Science and Technology (Skoltech). Skoltech is a newly-launched university located near Moscow focused on bringing a culture of entrepreneurship and innovation to Russian higher education. At MIT, Thomas collaborated with faculty and staff to develop programming focused on active pedagogical techniques, curriculum design and delivery, collaborative research, entrepreneurship and innovation, and leadership.

He has also served as a co-organizer of the MIT Global Startup Workshop (GSW), an annual event aimed at fostering entrepreneurial ecosystems around the world. Previously, he worked as a research intern with the Carnegie Endowment in Moscow, where he studied the role of so-called ‘innovation clusters’ in economic and political development. He holds a B.A. in Political Science and Russian from Hobart and William Smith Colleges.

Cathy Tripp

Program Coordinator, Citizen Diplomacy Programs



Cathy joined the WorldBoston team in January 2017 and currently coordinates professional programming for our many International Visitor Leadership Program delegations. She is passionate about public and cultural diplomacy, and is a language-learning enthusiast!

Cathy is a candidate for a Bachelor’s degree in International Affairs with minors in Cultural Anthropology and Law & Public Policy from Northeastern University. Originally from the San Francisco Bay Area, she has had the privilege to study abroad in Greece, Bosnia, Serbia, and the United Kingdom.

Membership Coordinator:

Lorraine Goldstein,


Program Associates:

Jacob Lensing-Sharp,

Dayo Hall,

Citizen Diplomacy Intern:

Jenna Bergquist,,

Young Leaders of the Americas Initiative

Global Education Intern:

Paige Welch,