Senior Leadership
Contact Nellie Kooistra
Nellie Kooistra
Nellie Kooistra joined ReFrame in February 2025 after more than 15 years of experience at the Calvin University Nagel Institute, where she coordinated international scholarly projects in theology and the social sciences in China, India, and across Sub-Saharan Africa. She has a strong background in international budgeting, project and event management, sub-granting operations, and inter-institutional cooperation.
Nellie holds an MBA from Calvin University, where she was the program’s first female graduate in 2023. She and her family live in Grand Rapids, Michigan. In her free time, she enjoys walking and swimming along the shores of Lake Michigan.
Contact Jessica Fox
Jessica Fox
Phone: 616.224.0807
Bio: Jessica joined ReFrame Ministries in 2022, bringing with her a wealth of hospitality and event management experience, complemented by a fresh degree in Ministry Leadership. Her passion for helping others share the gospel is evident in her dedicated work at ReFrame, where she plays a crucial role in facilitating meaningful connections and support for the organization's mission. Alongside her professional commitments, Jessica shares a deep love for travel and exploration with her husband, Steve. Their adventures together not only enrich their personal lives but also fuel Jessica's enthusiasm for missions.
Ministry Team Leaders
Contact Rev. Youssef Adel Hanna
Rev. Youssef Adel Hanna
Before joining ReFrame in 2023, Youssef has pastored churches in the Egyptian Presbyterian Church denomination for more than 20 years. He is a highly respected, proven leader with a servant’s heart and a team-building personality. We give thanks to God for bringing Rev. Youssef to help build the Arabic media ministry.
We are excited about the vision Rev. Youssef has for making the gospel more accessible to people in Egypt and the wider Arabic-speaking world. He will also use media to bring the gospel to the younger generation.
Please pray for Rev. Youssef and his team as they build the ministry on a solid footing and proclaim the good news in Arabic.
Contact Pastor Jerry An
Pastor Jerry An
Since joining ReFrame Ministries in October 2013, Jerry has established the new media ministry as a pioneer and think tank for Chinese-speaking churches worldwide.
Originally from Hebei, China, Jerry moved to the United States in 1998. In 2004, he received an MBA from Azusa Pacific University. He is working toward a Doctor of Ministry from Calvin Theological Seminary.
Jerry and his wife, Gloria, have one son.
Contact Justin Sterenberg
Justin Sterenberg
Justin Sterenberg came to ReFrame Ministries in 2013 with a passion to create elegantly simple user experiences that cultivate authenticity and community. He serves as director of the English language ministry, crafting and implementing ministry-wide strategies. Justin leads a team of marketing, web design, social media, and audio professionals focused on telling God’s story in ways most accessible to media users in today’s digital and mobile environment.
Justin received a B.A. in Business Communication from Calvin University. Before coming to ReFrame, he worked in project and marketing management. Justin and his wife, Thea, enjoy playing with their two dogs and spending time with family and friends.
Contact Rev. Marc Nabie
Rev. Marc Nabie
Marc joined the ReFrame's French ministry team in Burkina Faso in 2015. Before joining us, he pastored a church and served as the director of the Léo Bible School. Marc has also been instrumental in planting churches in five villages in Burkina Faso.
Marc received a degree in theology from Faculté Jean Calvin in France. He and his wife Jocelyn have three children.
Contact Rev. Arliyanus Larosa
Rev. Arliyanus Larosa
Rev. Arliyanus lives by the motto "make others experience what we have experienced from God; receive what we have received from God." He has lived this out during his service as General Secretary of the Indonesian Christian Church (GKI) Synod and in his current role as ministry leader. Rev. Arliyanus earned a masters of theology degree from Jakarta Theological Seminary in the department of mission and dialogue. He lives in Jakarta with his wife, Esther, and three children.
Contact Rev. Masao Yamashita
Rev. Masao Yamashita
Masao became the Japanese ministry leader in 1998. He was raised in a Buddhist family, but at age sixteen he borrowed a Bible. As Masao read it, he felt God speak to him. He began attending a local church and started listening to our Japanese radio program The Morning Word. A year later he committed his life to Christ. Masao studied at Kobe Reformed Seminary and then graduated from Calvin Seminary in Grand Rapids, Michigan.
Masao and his wife, Tomoko, have four children and six grandchildren.
Contact Rev. Hernandes Dias Lopes
Rev. Hernandes Dias Lopes
Hernandes became the Portuguese ministry leader in 2010. He also serves as the director of the organization Luz Para o Caminho (Light for the Way), an organization formed in partnership between ReFrame and the Presbyterian Church of Brazil. Hernandes has authored more than 100 books and is a popular conference speaker in Brazil.
Hernandes graduated from Seminário Presbiteriano do Sul in Campania and earned a Doctorate of Ministry from Reformed Theological Seminary in Jackson, MS. He and his wife, Tinha, have two children.
Contact Rev. Huascar de la Cruz
Rev. Huascar de la Cruz
Rev. Huascar de la Cruz earned his M.Div. from Calvin Theological Seminary and has since been serving the Presbyterian Church in Mexico’s state of Tobasco since 2004. Huascar’s appointment in late 2019 marked a new partnership between ReFrame and the Presbyterian Church in Mexico and a new chapter for our Spanish ministry. Huascar has been married for 27 years to his wife, Fulvia. He and Fulvia have four adult children.
Advancement Staff
Contact Jessica Fox
Jessica Fox
Phone: 616.224.0807
Bio: Jessica joined ReFrame Ministries in 2022, bringing with her a wealth of hospitality and event management experience, complemented by a fresh degree in Ministry Leadership. Her passion for helping others share the gospel is evident in her dedicated work at ReFrame, where she plays a crucial role in facilitating meaningful connections and support for the organization's mission. Alongside her professional commitments, Jessica shares a deep love for travel and exploration with her husband, Steve. Their adventures together not only enrich their personal lives but also fuel Jessica's enthusiasm for missions.
Contact Tiffany Kraker
Tiffany Kraker
Tiffany joined ReFrame Ministries in 2025 with over 15 years of experience in marketing and communications. She leads strategic campaigns that connect supporters to the ministry through storytelling, brand development, and community engagement.
Before ReFrame, she served as Director of Marketing & Communications at Zeeland Christian School and has worked with public agencies, small businesses, and nonprofits across West Michigan. Tiffany also founded Michigan Fosters, a nonprofit supporting foster families, and helped launch Journey Home, a space for family reunification visits.
She lives on a hobby farm in West Olive, Michigan, with her husband and four daughters. She enjoys good stories, creative projects, and time outdoors with her family.
English Ministry Staff
Jeff Bulthuis
Rev. Jeff Bulthuis came to ReFrame Ministries in 2018, at first to oversee our growing Prayer Team. With a passion to see people grow in their walk with God, he stepped over to manage the editing of the Today devotional and content strategy for all ReFrame programs. Prior to ReFrame, Jeff served as lead pastor in a congregation in Indiana.
Jeff has a B.A. in Psychology from Covenant College and an M.Div. from Calvin Theological Seminary. Jeff and his wife, Lisa, have five young children. They enjoy camping, spending time outdoors, and cheering on Chicago sports teams.
Chris Hunt
Chris Hunt started at ReFrame Ministries in 2013. Chris loves to see the gospel change lives. He manages marketing campaigns that introduce new users to ReFrame so that they can get the most out of their experience. Chris frequently blogs for all of our programs. Prior to ReFrame, he marketed children’s programs at Awana. Chris served 16 years in the U.S. Navy.
Chris holds a B.A. from Alma College and a M.A. from Northern Illinois University. Chris and his wife, Sarah, have five children. In his spare time, he enjoys playing board games.
Courtney Jacob
Courtney Jacob joined ReFrame Ministries in 2006. Her passion for God’s matchless Word infuses every episode of Groundwork. She also shepherded the growth ReFrame’s prayer ministry. Before stepping into her current role, Courtney served in a variety of writing and production capacities with us.
Courtney has a B.A. in Communications from Calvin College and an M.Div. from Northern Seminary. Courtney and her husband, Luke, have three sons. In her free time, she enjoys being outside and playing the flute.
Contact Marc Miller
Marc Miller
Marc Miller came to work at ReFrame Ministries in 2007. He manages the technical aspects of all the ReFrame websites.
Marc graduated from Calvin College with a B.A. in Communications. He put that degree to use working in the Chicago film industry for 5 years before switching to a career in web development. Marc and his wife, Sara, have two sons.
Contact Justin Sterenberg
Justin Sterenberg
Justin Sterenberg came to ReFrame Ministries in 2013 with a passion to create elegantly simple user experiences that cultivate authenticity and community. He serves as director of the English language ministry, crafting and implementing ministry-wide strategies. Justin leads a team of marketing, web design, social media, and audio professionals focused on telling God’s story in ways most accessible to media users in today’s digital and mobile environment.
Justin received a B.A. in Business Communication from Calvin University. Before coming to ReFrame, he worked in project and marketing management. Justin and his wife, Thea, enjoy playing with their two dogs and spending time with family and friends.
Rachel Syens
Rachel Syens joined ReFrame Ministries in February 2020. Passionate about forming meaningful connections in our increasingly digital world, Rachel is responsible for connecting a global audience with ReFrame Ministries through social media management of seven English-language programs, email marketing, and digital marketing strategies.
Rachel holds a B.A. from Hope College and an M.A. from Western Michigan University, and completed a semester abroad in York, England. She enjoys writing, supporting local coffee shops, traveling, and playing with her Yorkshire Terrier, Poppy.
Ron VandenBurg
Ron VandenBurg joined the ReFrame Ministries team in 2014. He plans and develops projects specifically for the spiritual formation of children. His main areas of focus are the Kids Corner podcast and devotional materials. Before coming to ReFrame, Ron taught middle school for 27 years.
Ron is a graduate of Calvin University and earned a M. Ed. degree in Teaching, Learning and Development at Brock University. In his free time, he enjoys watching, writing, performing and directing local theatre productions. Ron and his wife, Rachel, have three adult children and reside in Ontario.
Emily Vanden Heuvel
Rev. Emily Vanden Heuvel came to ReFrame Ministries in January 2019 with a desire to help people see God’s love and grace in the painful moments of life. As Senior Producer of Pastoral Care, she coordinates our Prayer Team and follow-up care to those who interact with our programs. Before joining ReFrame, Emily served as a chaplain, counseling children and adults in trauma and crisis recovery.
Emily received her B.S. from Kuyper College and M.Div. from Calvin Theological Seminary. Emily and her husband, Ryan, have two children. She loves to preach and mentor kids. She also enjoys cooking, baking, and gardening.