Faculty & Staff

Leadership Team

Todd M. Johnson, Ph.D., Co-Director

Todd M. Johnson is the Paul E. and Eva B. Toms Distinguished Professor of Mission and Global Christianity and Co-Director of the Center for the Study of Global Christianity at Gordon-Conwell Theological Seminary. Johnson is visiting Research Fellow at Boston University’s Institute for Culture, Religion and World Affairs leading a research project on international religious demography. He is co-editor of the Atlas of Global Christianity (Edinburgh University Press) and co-author of the World Christian Encyclopedia (Oxford University Press, 2nd ed.) and World Christian Trends (William Carey Library). He is co-editor of the World Christian Database (Brill) and World Religion Database (Brill).

Contact: [email protected]


Gina A. Zurlo, Ph.D., Co-Director

Gina A. Zurlo is Co-Director of the Center for the Study of Global Christianity and received her Ph.D. from Boston University in 2017. Her research focuses on the intersection between international religious demography, world Christianity, and the history of the social scientific study of religion. She is also a Visiting Research Fellow at Boston University’s Institute on Culture, Religion and World Affairs, where she is co-editor-in-chief of the Journal of Religion and Demography and works on the World Religion Database (Brill). Click here for CV.

Contact: [email protected]


Peter F. Crossing, Data Analyst

Peter F. Crossing’s background as a professional forester in Australia has proven useful when re-applied to the task of tracking disciples of Jesus Christ in all nations. He has a Diploma of Theology (Missiology) from the Australian College of Theology at WEC’s Missionary Training College and has gained further computer mapping and database expertise through work at the Sydney Centre for World Mission, the National Church Life Survey, and Mapinfo Australia. These positions led to a role as data analyst for the World Christian Database, from which came the World Christian Encyclopedia, World Christian Trends and now the Atlas of Global Christianity. He is married with two daughters and a son and lives near Sydney, telecommuting daily to Boston’s Center for the Study of Global Christianity.

Research Associates

Bradley A. Coon, M.A.

Bradley A. Coon is a research associate at the Center for the Study of Global Christianity and was the Information Designer for the Atlas of Global Christianity. He has a BA in Biblical and Theological Studies from Gordon College, an MA in Religion with a concentration in Global Christianity from Gordon-Conwell and is currently enrolled in a Doctor of Ministry program at Gordon-Conwell. At home with his wife, Mary, in northeastern Massachusetts, Brad enjoys woodworking, scuba diving, playing guitar at church and walking their dog, Nelly.


Michael Hahn, M.Div.

A graduate of Gordon-Conwell Theological Seminary (M.Div, 2020), Michael has been with the Center for the Study of Global Christianity since 2018. Prior to his studies, he worked as an analyst in commercial real estate and led small groups for his church in Los Angeles. He also holds a BA in Political Science from UCLA. An avid writer of short fiction and creative nonfiction, Michael is currently in the MFA in Writing program at Vermont College of Fine Arts.


Hannah Nation, M.A.

Hannah Nation is the Director of Communications and Content for China Partnership (CP), a ministry working to equip Chinese house church pastors with the gospel of grace. She is currently leading multiple writing projects for CP to bring the developing theology of the Chinese house church to the English speaking world. Hannah worked for many years in international ministry to Chinese students both in mainland China and the United States. She holds a Bachelor of Arts in History from Covenant College, and a Master of Arts in Church History from Gordon-Conwell Theological Seminary. In addition to the modern Chinese church, Hannah is generally interested in the early history of American missions and the roles of women therein. She lives in Cambridge, Massachusetts.


Kenneth R. Ross, O.B.E., B.A., B.D. (Hons), Ph.D.

Kenneth R. Ross is Professor of Contextual Theology at Zomba Theological University, Visiting Professor at the University of Livingstonia and Nile Theological College, Juba, and Honorary Fellow at the Edinburgh University School of Divinity. He is a Presbyterian pastor (Church of Scotland) who has earlier served as Professor of Theology at the University of Malawi and as General Secretary of the Church of Scotland Board of World Mission. He co-edited the Atlas of Global Christianity (Edinburgh University Press, 2009). His recent publications include Ecumenical Missiology: Changing Landscapes and New Conceptions of Mission (Oxford: Regnum and Geneva: WCC, 2016) and Mission as God’s Spiral of Renewal (Mzuzu: Mzuni Press, 2019). His work with the Center is focused on co-editing the “Edinburgh Companions to Global Christianity” – a series of books published by Edinburgh University Press.

Research Assistants

Nadia Andrilenas

Nadia switched coasts to study at Gordon-Conwell, coming from Seattle, Washington to pursue a Master in Intercultural Studies.  She’s interested in the experience of women in different cultures and combining data and research to support learning among Christians around the world. She has been a TESOL teacher in Vietnam, case manager for adults with developmental disabilities and an evaluation and strategy consultant for social impact projects. She holds a Bachelor of Arts in Cultural Anthropology, Master of Social Work and graduate certificate in International Development Policy and Management, all from University of Washington.


Ruthanne Brooks

Ruthanne Brooks is from Canton, Ohio (though she happily claims her Western PA roots). She holds a B.A. in Bible and Theology from Malone University and is currently pursuing M.A.’s in Biblical Languages and Old Testament at Gordon-Conwell Theological Seminary. She plans on pursuing a Ph.D. in Hebrew Bible in which she will implement an interdisciplinary approach to rhetorical criticism, focusing on the implementation of literary symbolism. When she’s not studying, she loves music, watching her Pittsburgh Steelers and Disney movies, and anything related to health and fitness.


Jane Chun

Jane was born in New Jersey and was raised in New York City, where she was constantly challenged by an insider’s perspective into marginalization and human rights issues. She completed her Bachelor’s of Arts in Pre-Law, English, and History and was working as a Secondary English Teacher through Teach for America when God called her to the M.Div Program at Gordon Conwell. As a second-generation Korean American, Jane is passionate about the importance of quantitative research in the immigrant church of America and how it can be used to build up the church by better informing its future. Other than her time at the center, Jane is the youth pastor at North Boston Korean United Methodist Church in Andover, MA and serves on staff on ARISE Youth Ministries as Worship Coordinator/Korean Church Liaison.


Alejandra Fontecha

Ale was born in Colombia (South America) and raised in Nashville, Tennesse and holds a Bachelors of Science in Exercise Science. She volunteered for four years at the Tennesse Prison for Women as an English as a Second Language teacher and is now a student at Gordon-Conwell Theological Seminary pursuing a Masters in Counseling and a Masters in Religion with a concentration in Womanist Theology. In her spare time, Ale climbs mountains and loves a good hiking challenge. She also plays soccer and loves to be outside.


David A. Hannan

David A. Hannan was born in St. Albans, West Virginia and holds a B.A. in Statistics and Creative Writing from Marshall University in Huntington, West Virginia. There he was the recipient of a Yeager Scholarship through which he attended a summer literature program at Exeter College, Oxford University. Beginning Fall 2019, he will pursue a Master of Arts in Old Testament and Biblical Languages at Gordon-Conwell Theological Seminary. David loves leading worship, learning new languages, ecumenism, and exploring how the intersections between fields of study can help people better understand Christianity.


Colbry Martin

Colbry is from Birmingham, AL, but he spent most of his childhood with his family in New Delhi, India. He completed a Bachelor of Arts in Biblical Studies from Southeastern University in Lakeland, FL. He is a second-year student at Gordon Conwell, pursuing a Master of Arts in Religion, with a focus on Church History and World Mission. He is particularly fond of black coffee and Alabama football.

Byington Scholar

Sharon Ellis

Sharon was born in Canada but grew up in Pakistan where her parents were involved in relief and development work amongst Afghan refugees. She has a background in Biblical studies, writing, and film and has spent most of the past 14 years serving overseas in one of these areas. She is currently in her first year at Gordon-Conwell Theological Seminary doing a Master of Arts in Religion with a focus on world religions and contextualization.

Design Team

Chris Guidry

Christopher R. Guidry, Design Consultant

A graduate of the United States Military Academy (USMA) at West Point, immersed in print production experience at Last Days Ministries (LDM), and secunded from Youth With A Mission (YWAM), Christopher R. Guidry started in a 3-month position scanning images for Dr. Johnson and Dr. Barrett in the fall of 1996 for the World Christian Encyclopedia. Over the next six years, Chris migrated into page layout, print production, and other technical aspects of developing such data-heavy works. Highlights of his time include service as the associate editor of World Christian Trends, page layout for the Atlas of Global Christianity, and production assistance on various other publications. Chris, his wife, Jeanine, and their three dogs live in Richmond, Virginia.


Chris Guidry

Bryan Nicholson, M.S., Cartographer/Geographer

Bryan Nicholson is a Cartographer/Geographer working on the Design Team at the Center for the Study of Global Christianity. He is a graduate of Clemson University (B.S. in Management) and the University of Georgia (M.S. in Geography). His studies focused on cartography, geographic information systems (GIS), and cultural geography. He has designed maps and data visualizations for many organizations and publications through his project, cartoMission. He also teaches as an adjunct Geography instructor in Colorado Springs, CO.