Global Programs


Timothy Keller

Chairman of the Board
Manhattan, NY

Timothy Keller is Chairman of Redeemer City to City and the founding pastor of Redeemer Presbyterian Church in Manhattan, which he started in 1989 with his wife, Kathy, and three young sons. For over twenty years he has led a diverse congregation of young professionals that has grown to a weekly attendance of over 5,000.  

Dr. Keller was born and raised in Pennsylvania, and educated at Bucknell University, Gordon-Conwell Theological Seminary, and Westminster Theological Seminary. He previously served as the pastor of West Hopewell Presbyterian Church in Hopewell, Virginia, Associate Professor of Practical Theology at Westminster Theological Seminary, and Director of Mercy Ministries for the Presbyterian Church in America.


Steve Shackelford

Chief Executive Officer
Manhattan, NY

Steve Shackelford oversees the direction, growth, and operation of Redeemer City to City as Chief Executive Officer.

He comes to CTC with a wealth of business and leadership experience, having most recently held the position of President and CFO of the fifth largest business development company in the U.S.
Steve and his high school sweetheart, Lisa, have been married for 30 years. They have three adult children and one grandson. Their children live in Atlanta, Brooklyn and Nashville.
Steve enjoys reading, writing poetry, history, travel and tennis. After 20 years in Orlando, he and Lisa have relocated to the UWS of NYC. 



Tim Cox

Director, Communications & Media
Brooklyn, NY

Tim Cox manages social, email, technology and this very website for City to City. 

His work in recruiting and web marketing for three Christian universities prepared him for this role. His degree in music did not.

Tim and his wife Karen live in Park Slope, Brooklyn with their four cats. 


Sarah Grover


Seminary and Salesforce Administrator
Manhattan, NY

Sarah wears two hats at CTC. One hat is Salesforce Administrator, where she is in charge of administrating and supporting all departments when using Salesforce. WIth the other hat, she is in charge of the day-to-day logistics and resources of the burgeoning seminary If you need to know something related to what we’re doing at CTC, or check out a book from our ever expanding library, talk to Sarah.

Sarah recently graduated from Pratt Institute with a Masters in Library and Information Sciences. Originally from Virginia, Sarah has lived in New York City for over a decade, and can now look at a random street corner and tell you what used to be there before a bank moved in. In her free time, Sarah enjoys running, listening to podcasts, competing in Simpsons Trivia, spending time with friends and enemies alike, and reading an exorbitant number of books with her book club.





Kimberly's role is to manage financial and human resources operations, and ensure programs that support CTC's strategic plans are effectively executed.  Kimberly has worn different hats throughout her career but her sweet spot is managing people, processes and projects.  

Kimberly grew up in the suburbs of Orange County, CA but is a true city girl.  She's been blessed to live in such great cities such as San Francisco and Paris, but it's New York City that has captured her heart.  

She finds joy in traveling, reading, entertaining, spending time with friends and family, and finding any excuse at all to be in Central Park.  She is passionate about sharing the gospel and discipleship and considers it a privilege to be on the City to City team.

Kimberly lives on the Upper East Side in Manhattan.


Rebekah Knable


Coordinator, Advancement
Manhattan, NY

Rebekah creates community and engagement opportunities for those who financially support the CTC mission. Additionally, she manages advancement proposal development and reporting. She is excited to bring her passion for hospitality to the donor experience.

She comes to NY from the rolling hills of Virginia hunt and wine country, but has always had a heart for urban ministry and city life. A lover of beauty and all things creative, Rebekah is looking forward to immersing herself in the art and architecture that the numerous New York neighborhoods have to offer.





Clara works on publishing projects based on the work of Timothy Keller and Redeemer Presbyterian Church. She handles publisher relations, licensing and permissions requests, and foreign translations with publishers, agents, and ministries around the world. She also assists with Redeemer City to City’s events and conferences.

Clara previously worked at Nature Publishing Group, where she worked in customer service and operations for the site license business unit, and spent a year with a mission in Trujillo, Peru's third largest city. She has a passion for cross-cultural communication and resourcing leaders in other parts of the world.

Originally from Southern California, she graduated from NYU with degrees in History and Economics and has been a member of Redeemer Presbyterian Church for over ten years.


Melanie Penn


Director, Partner engagement, Southeast
Brooklyn, NY

Melanie Penn is a native Virginian and comes from a long line of Presbyterian church planters from the midwest. Before them, she descends from some spiritual radicals who sailed to North America on the Mayflower.

Melanie is committed to collaborating with American philanthropists in the southeast who give major gifts to CTC, and she considers it a privilege to help heroic church planters from all over the world.

She lives in Brooklyn and is also a professional worship leader and singer-songwriter.


Mark Reynolds


VICE PRESIDENT, Operations & leadership Programs

Mark provides oversight of church planter training, assessment, coaching and funding as well as bringing new CTC initiatives to market. 

He is passionate about creating learning programs that further develop leaders to reach their vision of planting new urban congregations and resourcing them through coaching, training and feedback.

Before serving in this current position he was the field director with Mission to the World in Manila facilitating church planting with Filipinos. Mark has also helped plant a church in Columbus, Ohio, served as campus staff with Campus Crusade at Oregon State University, and holds graduate degrees from Covenant Seminary, Aberdeen University and Saint Louis University.

Mark lives with his wife and two sons in Manhattan, all of whom share common affinities for reading, sports, and love for NYC.


Doug Thorson


Vice President, Advancement
Manhattan, NY

Doug leads the advancement efforts that support CTC's rapidly growing global footprint. He views his role as a calling to help faithful stewards grow in generosity. 

Doug brings over 15 years of experience in developing key partnerships for charitable organizations. He also brings two decades of marketplace experience in communications, strategic selling, and business planning. His passions are mission clarity, strategic planning and execution, and cohesive integration of all communication platforms that are working toward mission advancement.  

Doug is married to Susan and they have four children.  After 28 years in Virginia, they are now living in the Washington Heights neighborhood of Manhattan with their 17-year old son, Brady.


John thomas

John Thomas.jpg

Senior Director, Training
Manhattan, NY

John Thomas is responsible for designing and delivering many of our training experiences for CTC, both in New York and in other global cities. From 2008-2011, he has written and field-tested CTC's Incubator, a transformational training system for urban church planters. His vision is to develop a global cadre of trainers who collaborate in the service of gospel church planting in every city in which we work.

John has been involved in ministry training and church planting overseas, as well as in the US, most recently planting Church of the Redeemer in Atlanta.

John earned a Ph.D. in anthropology with an emphasis in adult education and spiritual formation, and continues to be intrigued by how epistemology, ethos, and cultural values impact the quest to know God and each other.

He is married to Shari, founder/director of Parakaleo, a ministry dedicated to the care and nurture of church planting couples. They live on the Upper West Side of Manhattan.


Stephen UM


Assistant Director, Training
Boston, ma

Stephen Um (Ph.D., University of St. Andrews) is the senior minister of Citylife Presbyterian Church in Boston, MA. He teaches New Testament studies at Gordon-Conwell Theological Seminary, and serves as a council member with The Gospel Coalition.

For the past 25 years, Stephen and his wife, have been involved in several Presbyterian Churches throughout the Northeastern part of the country. He is the author of The Kingdom of God, Why Cities Matter (Crossway, 2013) and the forthcoming commentary on 1 Corinthians from the Preaching the Word series (2015). His sermons and resources are available online at The Center for Gospel Culture.





Katie Ellis



Katie works with all projects facing Asia Pacific. She spends much of her time creating systems for recruiting and training church planters in cities throughout Asia. This includes coordinating trainings, managing the International Intensive in Asia and supporting CTC leaders in Asia.

Katie lives in Brooklyn and enjoys cooking, traveling to see friends and family and creating pretty things.


Jay Kyle


Vice PResident, Global Catalyst
Franklin, TN

Jay oversees the recruiting, mentoring and coaching church planters in the megacities of Asia Pacific and Latin America.

Jay attended high school in Manila, Philippines and graduated with a BA from Belhaven University in Jackson, Mississippi. He received an MDiv from Reformed Theological Seminary in Jackson, Mississippi.

He served for thirty-two years as a missionary with Mission to the World (MTW), the overseas mission arm of the Presbyterian Church in America. During those years he worked with Wycliffe Bible Translators in Papua New Guinea; founded MTW's Short-term Missions Program; served as MTW's Personnel Director, as their church-planting team leader in Mexico City, and as Field Director for Mexico and Central America.

Jay serves on the Boards of Belhaven University and the Asian Charity Services in Hong Kong.

Jay and his wife, Maureen, live in Franklin, TN and have three grown children and six grandchildren.





Gary and his family first got involved in church planting as part of a core team in Hawaii in 1980. Soon after that they were called to cross-cultural church planting with the foreign missions arm of the Presbyterian Church in America, called Mission to the World.

He and his family have been involved in church planting, training, mentoring and coaching in Mexico City, Monterrey, Mexico, and Manila, Philippines before joining City to City. Gary's current role is to assist in the training, coaching, and networking among the churches of Japan.

Gary and his wife, Lois, have been blessed with 3 grown children.


Europe, Middle East, And Africa



Al Barth


Vice President, GLobal Catalyst
Boca Raton, FL

Al is an ordained minister in the Presbyterian Church In America. Having planted four churches over his pastoral career, he now works primarily as a Church Planting Catalyst for church planting in major cities - helping to start new movements of churches in leading cities of Europe, the Middle East, Africa and North America. He has served as a coach, trainer and mentor for many global church planters.

He and his wife, Rene, have three adult children and are grandparents to ten grandchildren.


Ruth Leary



Ruth supports the work of church planters in Europe, the Middle East and Africa. She helps connect church and network leaders in those regions to City to City. 

Born in Richmond, VA to missionary parents, Ruth spent half of her formative years in Kiev, Ukraine. Living in Eastern Europe gave Ruth a passion for connecting with people of different cultures. She loves spending time with the world-changing leaders at City to City. 

Ruth graduated from the University of Virginia where she studied Foreign Affairs and Russian and Eastern European Studies. She lives on the Upper West Side of Manhattan and enjoys spending time outdoors, traveling and a good cup of coffee. 


Walter Wood



Walter Wood's ministry career has taken him through campus ministry with Cru, seminary (M.Div., D.Min.) in Jackson MS, a 12-year stint at Perimeter Church in Atlanta, and founding and Sr. Pastor of North Cincinnati Community Church in Mason, Ohio.

He and his wife Becky planted the church in 1994, and over the 21 years, NCCC grew and was able to plant 8 other churches in the Cincinnati area and beyond.  Walter has been working with City to City as an adjunct field staff during his last three years at North Cincinnati, in several cities in Southern Europe, and now has been taken on by CTC in a full-time capacity as Assistant Director of Global Affiliates.

Walter’s responsibilities are to coach church planters in Europe and to develop partnerships between North American churches and CTC’s target cities.

Walter is married to Rebecca and they have two grown children and three grandchildren.


Latin America


Andres Garza


Regional Director, Latin America
Monterrey, Mexico

Andres is an ordained pastor in the National Presbyterian Church in Mexico and an Architect with a master’s degree in Urban Planning. He grew up in Monterrey, Mexico as a Catholic and came to know God in college through his now wife, Ruth. 

He worked for the government of several cities as a city planner for about 15 years before earning a masters degree of Divinity from Reformed Theological Seminary in Charlotte, NC in 2006. He returned to Monterrey, Mexico to serve as the team leader for MTW in the Church Planting Movement, establishing a Church Planting Center to plant churches in 27 cities in Northern Mexico. After many years of working together with Redeemer City to City as an affiliated network leader, he accepted the call in 2015 to lead CTC's efforts in global cities throughout Latin America in order to see a larger vision for gospel-centered, kingdom-minded and multiplying churches.

His wife is Ruth is also a city planner. She is developing a church planter’s wives' ministry. The Garzas have two daughters, Lissete and Priscila. 


New York City




program Coordinator, New York City
Manhattan, NY

Denine provides support for the NYC team and creates processes to make things run more smoothly. The best part of her job is getting planters the training they need to help them start Jesus-loving churches that serve their communities.

Denine was a hip hop dance missionary in the Dominican Republic where two seemingly unrelated things occurred: she developed a passion for church planting in urban centers, and began attending Robert Guerrero’s church. After moving back to New York, she reconnected with Robert, began working as his assistant, and helped him start a church. 

A New York City native, Denine now lives in Washington Heights with her husband Robert Blevins. She enjoys mentoring, storytelling podcasts, and, of course, hip hop dancing.


Cody Dunn


Leadership Pipeline Coordinator, New York City
Manhattan, NY

Cody helps execute and support CTC’s training programs for leaders in New York City. He counts it a privilege to participate in the renewal of the city by helping leaders flourish in the calling God has given them.

Cody grew up in rural southeastern Virginia and never thought he would call an urban center like New York home. He earned a degree in Mechanical Engineering from Virginia Tech and comes alive when spending time in nature, even if only by taking in the view of the skyline from his fire escape.

Fluent in Spanish, Cody is married to Kelsey and lives in Washington Heights. They are both active in Cru’s Millennials network and enjoy exploring New York’s incredible patchwork of neighborhoods together. 



Robert Guerrero



Robert is the New York City Church Planting Catalyst working to network with existing churches and to identify and coach new church planters.

Born to Dominican parents in New York City, Robert has spent much of his life in both the U.S. and Dominican Republic. He earned a degree in theology from Moody Bible Institute and during his studies was active in the ministry of Lawndale Community Church, Chicago, as well as planting La Villita Community Church. In 1995, Robert and his wife moved into the Colonial City of Santo Domingo where they planted Iglesia Comunitaria Cristiana (ICC) with a focus on justice and compassion for the most under-resourced in the community.

Robert is also the co-founder of the Coordinating Community of Del Camino Network for Integral Mission in Latin America with networks in Costa Rica, Argentina, Chile, Guatemala, Honduras, Nicaragua, Brazil and the Dominican Republic.


MAi Hariu-Powell


Executive Director, The New York Project

Mai oversees the New York Project, a 10-year joint initiative of Redeemer City to City and Redeemer Presbyterian Church to see the body of Christ triple in New York. She also coordinates fundraising specifically for the New York Project while coordinating, designing and teaching trainings on evangelism.
Before she joined City to City, she worked at Redeemer Presbyterian Church to open W83 Ministry Center for the West Side congregation and then to launch the Downtown congregation. She worked on several other projects but her favorite was running the Public Faith ministry year, especially the Questioning Christianity lecture series. 
Even before that, she spearheaded lobbying and communications campaigns for large-scale economic development efforts in NY for several years. She has her Masters in Public Affairs from Princeton and is proud to be from upstate but live in the city.

Learn more about the New York Project.


Ruben Soto

Senior Program Manager, New York City
Brooklyn, NY

Ruben comes to us from being the Director of Ministry Relations at Nyack College, where he developed partnerships between the college and area churches. He also spent several years as an active lay leader at Brooklyn Tabernacle.

Ruben is working on his MA in Biblical Studies from Gordon-Conwell Theological Seminary and lives in Bay Ridge, Brooklyn.





David has been involved in helping church plants for over 30 years. He and his wife, Kathleen, moved to New York City in 2003 specifically to plant churches. During that time, David has been a part of pioneering 3 church plants, including his current congregation, Grace, which meets on the Upper West Side and is planting another church in Queens. 

David has been coaching church planters throughout his time in Manhattan. He studied at Reformed Theological Seminary and Fuller Seminary. David also served as a chaplain at Duke University and the University of North Carolina at Chapel Hill at the same time. He has been certified by CoachNet, Gospel Coach and Church Multiplication Ministries. David, his wife and his two daughters live on the Upper West Side of Manhattan. His hobbies include trying to find time, cycling and playing guitar.