Mark Adams


Mark Adams, a native of Clover, South Carolina and a graduate of Columbia Theological Seminary in Decatur Geogia, was ordained in 1998 and has served as U.S. Coordinator of Frontera de Cristo since that same year. He is married to Miriam Maldonado Escobar, also a Presbyterian Church (USA) co-worker since 2011, and has three children. He sees his 1994 border mission experience in Piedras Negras, Mexico as foundational to his present ministry.

Jocabed Gallegos


Named Mexican Coordinator of Frontera de Cristo in 2014, Joca Gallegos (Rosario Jocabed Gallegos Viesca) first came to the border in 1990 when her father undertook the same position. She was born in Gómez Palacio, Durango and attended seminary in Mexico City (one of only three women studying theology) from 1998 until her graduation in 2002. She served as youth counselor in her presbytery, served in a church in Nogales, Sonora and assisted with health ministry in South Carolina before becoming an intern at Frontera de Cristo in 2010 and later Facilitator for Mission Delegations.

Trisha Maldonado

Office Manager
E-mail Trisha Maldonado

Trisha Maldonado was born and raised in Phoenix, Arizona. She was raised by her grandparents, who migrated to the United States from San Luis Potosí, Mexico.  In 2003, she and her daughter, Estrella, moved to Douglas. The plan was to only be here for a short time, but they ended up making Douglas their home.   Before working for Frontera de Cristo, Trisha was a reporter for the Douglas Dispatch.  In the short time she has been with Frontera de Cristo, she has seen the amazing work that is done in both communities of Douglas and Agua Prieta.

Brenda Cuellar

Bi-National Intern serving as US Coordinator of the Migrant Resource Center

Born in Maryland and raised in Michigan, Brenda first came to Frontera de Cristo on an immersion visit from Hope College.  Of Mexican heritage, Brenda was so excited by what she saw that she wanted to become part of the reconciliation between Mexico and the United States and the service being provided to migrants.   Thus, Brenda returned in November 2014 to begin a year-long internship as American coordinator of the Migrant Resource Center, located in Agua Prieta, where she now lives.  Her passion is to educate people about border issues and share of the love of Christ with the community.  She hopes the community will support Frontera de Cristo’s work through prayer, learning about border issues and purchasing Café Justo / Just Coffee.

James Martin

Bi-National Intern serving as an English Instructor

James Martin has lived most of his life in the state of Washington and holds a bachelor’s degree in biology and Spanish from Washington State University. He served as a Young Adult Volunteer in San Antonio, Texas in 2013 in order to gain a better insight into urban poverty and how the church can foster positive change. He learned that his passions and skills were in education and community.

Miriam Maldonado Escobar

Community Garden Facilitator

Miriam Maldonado Escobar is from the Mexican state of Chiapas and left home at age 18 to work at the border in U.S.- owned factories to help support her family. She and Mark Adams met when Mark came to Agua Prieta to serve at Frontera de Cristo. After working for several years alongside her husband, Miriam was invited in 2011 to serve as a Presbyterian Church (USA) mission co-worker. She works with DouglaPrieta Trabaja to help rehabilitation centers and families of the church, community and schools to grow their own food. She and Mark have three children.