Workshop Presenters

Tiago ArraisTiago Arrais currently studies Old Testament Theology at the Andrews University Theological Seminary.  He is also a worship, songwriter, and recording artist in his country of origin, Brazil.

Tiago is the husband of Paula and the father of Benjamin. Together they look forward to finishing school and returning to Brazil where Tiago will continue his ministry.



Alison BrookAlison Brook is first and foremost committed to the Gospel. Her wide range and eclectic musical taste contribute to her very unique folk/pop guitar-based sound. Her melodies are sweet and her lyrics are loaded. Alison's debut album, No Words, captures the singer’s energetic soprano without compromising its elegance. On this musical journey, she sings her way through struggle and victory alike, always returning to the love that is beyond even the album’s poetic words.

Alison’s sophomore project was quickly conceived after No Words as she chronicled her life experiences through song. When her Kickstarter campaign exceeded its goal, she knew others anticipated the album as much as she did. Working with Philadelphia-based Delon Lawrence to record the album’s eleven tracks, she went for an “urban-folk” sound, providing cameos for spoken word artist Lee G.

Andres FloresAndres Flores holds a Bachelors degree in Theology from Montemorelos University in Mexico. He is currently pursuing a Masters of Divinity at the Seventh-day Adventist Theological Seminary at Andrews University. Before coming to Andrews he had the privilege of serving in a multicultural church in Provo, Utah, where he learned how to lead worship in a diverse setting.

Andres has also been a youth pastor, and he enjoys facilitating worship experiences for young people in which their lives are transformed by the grace of God. Currently, he is the pastor of the Epic Church in Chicago. Epic focuses on discipleship with senior youth and young adults while engaging them in creative ways with the story of the Gospel.

For Andres, worship is a great passion because he believes that it is an important gateway to help new believers to connect with God and with our church. To learn more about Andres' ministry, visit   

Dave Gemmell

Dave Gemmell is an Associate Director of the NAD Ministerial Department. His role at Ministerial is to discover, develop, and distribute resources for the pastors of the NAD.  He also serves as a volunteer Associate Pastor for New Hope Seventh-day Adventist Church in Fulton, Maryland.

He received his Doctor of Ministry with an emphasis in multi-cultural leadership from Fuller Theological Seminar in 1992, Master of Divinity at the Seventh-day Adventist Theological Seminary in 1981, and his Bachelor in Theology from Pacific Union College in 1978. He has also taken coursework in television production.

He began pastoring in the San Francisco Bay Area in 1978, continued pastoring in Maui, and served for ten years as Senior Pastor of Las Vegas Mountain View Church.  He transferred his service to the NAD in 2002 where he has served Adventist Communication Network, Church Resource Center, and in June of 2011, the Ministerial Department. 

His wife Eileen is a Family Nurse Practitioner. They have three grown children: Nathan, Rika, and Jacob.

In his spare time he dreams of kitesurfing.

Kenley Hall

Kenley Hall is a passionate disciple of Jesus Christ. He enjoys being a husband, a father of three, and a   grandfather. He earned a Doctorate of Ministry Degree in Homiletics from the Seventh-day Adventist Theological Seminary.

He currently serves as an Associate Professor of Christian Ministry and as Director of Theological Field Education at the SDA Theological Seminary.

In his spare time he serves as one of the Pastors of One Place, a newly planted worship community.



Devon HowardDevon Howard began organ studies in CO at the age off 13. After earning a BS degree in Organ Performance with Judy Glass at Southern Adventist University in Collegedale Tennessee, he went to The Netherlands on a Fulbright scholarship studying organ performance and improvisation with Aart Bergwerff and Sietze de Vries. In 2012, he completed a Doctor of Musical Arts degree under Dr. Kimberly Marshall at Arizona State University.

His dissertation was titled Organ Improvisation in Context. Currently, Devon serves as the Minister of Worship & Music at the Kettering Seventh-day Adventist Church in Ohio.

He and his wife, Kimberly, are passionate about engaging others through their respective gifts in worship and hospitality ministries.


J. Nelson Kraybill J. Nelson Kraybill is Lead Pastor at Prairie Street Mennonite Church in Elkhart, Indiana and President-elect of Mennonite World Conference. Previously he served as President of Anabaptist Mennonite Biblical Seminary in Indiana, Programme Director at the London Mennonite Centre in England, pastor in Vermont, and high school teacher in Puerto Rico.

A Pennsylvania native and alumnus of Goshen College, he received a master’s degree from Princeton Theological Seminary and a Ph.D in New Testament from Union Presbyterian Seminary. Kraybill is a frequent speaker in church and academic settings, using images and story to interpret Scripture.

He is author of Apocalypse and Allegiance: Worship, Politics, and Devotion in the Book of Revelation (Brazos Press, 2010), and his peacemaking blog is at; His wife Ellen is a physical therapist, vocalist, and church musician.

John Lindstedt

John Lindstedt has worked for 33 years in the Audio/Visual installation and consulting business. During this time period he has been published in multiple trade magazines and technical support books and installed audio/visual systems in over 400 churches nationwide.

A resident of Niles, Michigan, he has worked on a number of local installations, including systems at the Ross-Ade Stadium-Purdue University, the Basilica of the Sacred Heart-University of Notre Dame, and the Howard Performing Arts Center-Andrews University. Additionally, he has worked as a sound engineer for the following national performers: Journey, Styx, REO Speedwagon, Aerosmith, Cher, John Mellencamp, Lee Greenwood, Creed, Amy Grant, and Michael W. Smith.


Adriana PereraAdriana Perera is currently an Associate Professor of Music Theory and Composition at Oakwood University, Alabama. She is a prolific composer, songwriter, pianist, choir conductor and recording artist. Adriana has been a Music and Worship professor at Seminario Adventista de Sagunto, Spain, and at Oakwood University.

As lecturer on Music and Worship, she has toured Europe, Latin America and the United States, giving conference and workshops on the topic. Some of her sacred pieces are included in “Bienvenidos a adorar”, the Adventist Hymnal Book for the Spaniard Conference, and in “Louvor e Adoraçao”, the Portuguese Youth Hymnal. Mrs.

Perera is the main editor and co-author for “En Espíritu y en Verdad”, a book on Music and Worship released by Pacific Press Publishing Association in 2013. Because she believes that "the Father is looking for those who will worship him in spirit and in truth," she strives to find relevant contemporary music formulas that convey God's message.

She is married to Francisco Burgos. They have two children: Laia, who plays violin, and Marcos, who plays percussion.

André Reis

Originally from Brazil, André Reis has a BA in Theology from Adventist University of São Paulo, a Masters in Music from the Longy School of Music in Boston, MA and is currently pursuing a PhD in New Testament at Avondale University.

He was one of the authors of En Espíritu y en Verdad, a book on Adventist music and worship published by Pacific Press (2013); his articles appeared at the Revisit Adventist (Spanish for the NAD), Adventist Today and Spectrum Magazine. Florida Hospital church in Orlando where he directs the Worship Choir and Children's Choir.



Marguerite Samuel

Marguerite M. Samuel is a co-director of Journey Ministries, a volunteer ensemble at Andrews University that specializes in negro spirituals and similar styles of choral music. She has directed this group from its inception in 2003 and for nearly 6 out of 10 years of its existence.

She received her Bachelor of Music in Music Education (emphasis in voice) in 2006 and is currently concluding her Master of Music in Choral Conducting at Andrews University. At Great Lakes Adventist Academy, Marguerite taught voice lessons and directed the large choir and the select touring group, Chamber Singers, from 2006-2011.

She also pioneered Encore! Strings, a string ensemble, in 2010. In addition, her love for music and the Lord is expressed through her singing ministry with her husband and in various choral ensembles at Andrews University.

Marguerite sees music as inseparable from worship and as a gift God has given for us to utilize not only in communing with Him but in fellowshipping with one another. She can be found experiencing her love for music with her little son, Noah and husband, Leslie Samuel, and enjoying the fellowship of others.

David WilliamsDavid Williams is the newly appointed Professor of Liturgy, Worship, and Music at the Seventh-day Adventist Theological Seminary to begin full-time in 2015. He is currently pursuing a PhD in Church History, Systematic Theology, and Musicology at Andrews University. His dissertation is entitled, "Worship Music as Theology: An Examination of Black and White Adventist Worship Music in North America from 1894 to 1944."

David is also a professional musician, having received a Master of Sacred Music in 2010 from the University of Notre Dame in liturgical history, sacred music history, and organ performance. He earned a Bachelor of Arts in Theology and a Bachelor of Science in Organ Performance from Southern Adventist University in 2005. He has studied extensively in Europe with leading artists in organ, additionally spending a year in the Netherlands receiving instruction from Sietze de Vries in improvisation. He performs regularly, seeking to engage audiences through historic literature, improvisation, and congregational singing.

David leads worship as Music Director of St. Mark Catholic Church, Niles, Michigan and serves as the volunteer Worship Director for the the First Seventh-day Adventist Church, South Bend, Indiana.

He is also the Worship Coordinator for the Seminary Chapel program.

His wife, Lorelei, is a Women's Health Nurse Practitioner in South Bend. They enjoy visiting family in Colorado and Arizona, as well as traveling abroad.

Steve Yeagley

Steve Yeagley is the Associate Dean for Student Life and Director of Co-Curricular Education at Andrews University.  He also serves as an Adjunct Professor of Youth Ministry at the Seventh-day Adventist Theological Seminary. 

As an ordained pastor, Steve has worked with youth and young adults for over 20 years in pastoral and educational settings.

His interest in the relationship between faith and culture is shared each year in the course Youth and Young Adults in Contemporary Culture.


Nick Zork

Nicholas Zork is a singer-songwriter, composer, liturgical musician, guitarist and lecturer on topics in theology, worship and the arts. He leads worship, teaches, and performs at conferences and music venues around the United States and abroad. Nicholas serves as director of the Andrews University Music and Worship Conference, which he helped found in 2004. He is the editor of Best Practices for Adventist Worship, an email newsletter published by the North American Division. And he is the minister for worship and the arts at Church of the Advent Hope in Manhattan.

Nicholas received a BA in Music and Religion from Andrews University in 2003 and an MA in Theology with a concentration in Theology and the Arts from Fuller Theological Seminary in 2009. He is currently a PhD Candidate in Theology with a concentration in Worship and Culture at Fuller Theological Seminary. In his spare time, Nicholas enjoys playing soccer and discovering new restaurants (and he hopes these two activities will offset one another).

Stephen ZorkStephen Zork, Associate Professor of Music, has served as Director of Choral Studies at Andrews University since 1991. He holds a Master of Music degree in choral conducting from Pacific Lutheran University. In addition to his conducting responsibilities with the five Andrews University Department of Music choirs, he maintains a studio of choral conducting students and oversees the graduate choral conducting degree. The University Singers under his direction tour internationally and throughout the United States.

In addition, Mr. Zork maintains a parallel schedule conducting choral festivals and lecture workshops in academic settings and in church ministries. As a member of Southwest Michigan's Council for the Christian Arts from 1997 to 2002, Mr. Zork was conductor of the Christian Arts Chorale. He was an adjunct faculty at Indiana University serving as primary conductor of the South Bend Symphonic Choir from 2003 to 2008. He is in his 20th year as Director of Music for the First Congregational Church UCC in St. Joseph, Michigan.