by Javier Márquez
Editor’s Note: This summer, 14 young adult Ambassadors are serving in congregations and ministries across Mosaic Conference. This article highlights three of these Ambassadors, and in the coming weeks, you will be introduced to the other Ambassadors. Read the first article here.

Brendan Sagastume, a 20-year-old Mosaic Conference Ambassador, views this summer as an opportunity to deepen his calling and continue growing as a leader in service to others. After a meaningful experience last year as an Ambassador for his congregation and the Mosaic Conference staff, Sagastume was inspired to become an Ambassador again, this time with Healthy Niños Honduras.
His responsibilities include coordinating service teams coming from the U.S. to Honduras, processing donations, and helping with communications.
“I hope to represent the Kingdom values of compassion and service,” Sagastume says. “Through this work, I hope to reflect Christ’s love in practical and relational ways.”
Sagastume is learning about the importance of flexibility and openness. “Serving often means being ready to help in ways I didn’t expect,” he explains. “I’ve seen how ministry happens not just through programs, but through everyday conversations and acts of kindness.” These insights have drawn him closer to God, teaching him to rely on God’s strength and not his own strength.
He invites Mosaic Conference to pray for strength, wisdom, deepened faith, and blessings for all with whom he is working.

Caitlyn Weber, a 23-year-old Mosaic Conference Ambassador, is embracing the legacy of her spiritual ancestors by serving at the Mennonite Heritage Center in Harleysville, Pennsylvania.
“I was motivated by a desire to be involved in my local community and local congregations,” Weber shared. “Working at the Heritage Center expands my understanding of what it means to be part of a church community and how we carry the legacy of our spiritual ancestors when navigating our beliefs and the world today.”
Weber’s role includes generating content for social media to extend the reach of the Heritage Center. She draws from artifacts, photographs, individual narratives, and congregational histories to develop stories she hopes will help today’s generations grow in understanding and faith.
“My work this summer will reflect peace and truth,” she says. “Studying the lives of those who came before us in the faith creates opportunities for understanding and living peace through their examples.”
She is already recognizing ways being an Ambassador has helped her to grow. “I’ve learned how to navigate museum and archival collections, and I’m learning how to reflect the experiences of others through writing, while collaborating closely with those around me.”

For Matthias Brockington, a 20-year-old Ambassador with Mosaic Conference, ministry is a calling deeply rooted in his growing relationship with Jesus. This summer, he’s stepping faithfully into that calling as a pastoral intern at Experience Christian Church (Exton, PA), partnering with Mosaic to grow in leadership, ministry, and community outreach.
“As my relationship with the Lord has grown, I’ve realized God has given me a gift of speaking.” Brockington shares. As an Ambassador, he is exploring the craft of sermon writing, working with the youth, and developing skills to build and lead community.
“I believe the Lord has spoken a shepherd spirit over my life,” Brockington says with conviction. He sees his ability to connect with people as a gift to reach people that may not know Jesus’ love.
One of the most important lessons he’s learned as an Ambassador is that young people are not walking this faith journey alone.
Brockington invites the Mosaic community to join him in prayer for the youth he’ll be leading this summer: “Pray that the Spirit of God moves in ways that are tangible for the children.”

Javier Márquez
Javier Márquez is Associate for Communication and Community Engagement for Colombia. He is an Anabaptist Colombian pacifist and poet. He is based in Bogota, Colombia.
Mosaic values two-way communication and encourages our constituents to respond with feedback, questions, or encouragement. To share your thoughts or send a message to the author, contact Javier at jmarquez@mosaicmennonites.org.