Deacon Team


James Aman

James was born in 1961, in a suburb of Philadelphia. When James was a teenager he became involved in a group called FOCUS that ministered to kids in private schools, and for several years he investigated the claims of Christianity. At the age of 18, he was convicted by the Holy Spirit of specific sins, and asked Christ to forgive him and save him. James went to college in St. Louis, MO and got a degree in Meteorology. While in college, he met his future wife, Nancy, while on a FOCUS ski trip. James and Nancy got married in 1990. In 1995, he felt led to move back to the East Coast to be closer to their parents. They moved to Gaithersburg and started attending Derwood with his growing family. James and Nancy have three children: Josh, Tim, and Beth. James serves in the Helping Hands ministry and is a Hall Monitor for AWANA. James and Nancy help lead the Career Singles Care Group, and together they serve in the Two Year Old Nursery class. Nancy is one of the leaders of the Care and Comfort Ministry.



David Brown

David Brown accepted Christ and was baptized at an early age. Blessed to grow up in a Christian family, he had constant exposure to the Bible. He received a Bachelor's degree in Accounting in 2006, and a Masters degree in Business Administration in 2008 from Pensacola Christian College. He is the owner of a small accounting and tax consulting business and uses his gifts on the Financial Advisor Board at DBC. In the past, David has also service in various children's ministry programs. It was at college that he met his wife Abigail. David and Abigail are blessed to have three young children: Caleb, Jeni, and Sophia. Abigail currently serves as the Nursery Coordinator at DBC and also serves in MOPS.


Brian Green

Brian was raised in Hampton, Iowa with his parents and sister. Brian prayed to accept Jesus as his savior with his parents at the age of five after a service at his home Church. He attended the University of Northern Iowa and received a bachelor’s degree in accounting. Brian relocated to the D.C. area in 1988 and began attending Montrose Baptist Church where he met his wife Kim. Brian and Kim were married in 1992 and welcomed their daughter Abby into the world in 1997. The Greens have been attending Derwood Bible Church since 2002. Brian has been helping the Church with financial and administrative matters since becoming a Deacon.  Kim has been teaching in the 3 year-old Sunday School class for much of their time at Derwood as well as has been a Cubbies leader. Brian works for Consumer Healthcare Products Association in Washington, D.C.


Ernie Koppen

Ernie was born in 1952 in Rockville, MD and raised in a Bible believing family.  When he was 14, his father who was in the Navy was transferred to the suburbs of Los Angeles. As a teen God pricked his heart at a camp in California and he gave his life to the Lord. After several years God blessed him by allowing him to move back to the Montgomery County area. 

After 17 years of working in and helping people in the MCPS system, he is retired and working back at MCPS part time. He currently serves on the greeting team, as an usher, and serving in the background of many events at DBC.  He looks forward to serving on the Deacon Board at Derwood Bible Church.

Tom Kummer

Tom was born and raised in western PA. He graduated from Penn Sate in 1978. In 1979 he married his high school sweet heart, Diane, and they are still going strong 38 years later. They have 2 grown children and 4 grandchildren living in the area. Tom is currently honored to serve on the Board of Directors for Rockville Pregnancy Clinic and Ivymount School.

Tom trusted the Lord as his Savior when he heard a clear gospel message at Reston Bible Church, where he and Diane were baptized.  They moved to Gaithersburg in 1984. The Kummers currently serve in the marriage ministry at DBC.  


Alan Langelli

Alan had the privilege of being a pastor’s kid and grew up in New York and Pennsylvania. He accepted Christ as his savior as a young child.  Alan met his wife, Stacey, in middle school, and they later married while in college.  Alan and Stacey have three children ~ Joshua, Paige and Drew ~ and are in the process of adopting their fourth child. Alan and Stacey lived in both Northern Virginia and Western PA before moving their family to Maryland in 2012 where they began attending DBC. Alan enjoys serving as a hall monitor for KidZone, a small group leader and helping with the church finances.


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Ken Sauerwein

Ken was born in Washington, DC, and has been a resident of Montgomery County all of his life.  He now lives in Gaithersburg with his wife Sandy.  They are the parents of two daughters, Amy and Robin, and have four grandchildren-Elijah, Mackenzie, Addison, and Isaiah Purdy. An electrician by trade, he now works for the Metropolitan Washington Airports Authority at Reagan National Airport where he is the leader of the electronic shop. Ken grew up in a large Baptist church and was saved there his junior year in high school. The Sauerweins joined DBC in the fall of 1999. Ken is a member of the tech team and enjoys serving behind the scenes doing electrical work and other projects at church. Sandy is the director of Chieftain Institute.


Vinnie Tallman

Vinnie grew up in Hornell, NY with his parents and brother, former DBC member, John. He became a Christian at the age of 13 when he answered an altar call at North Hornell Assembly of God Church. Vinnie attended Hartwick College and then received his Masters at the University of Pittsburgh where he met his wife, Debbie. The couple moved to Maryland in 1992. They have been attending DBC for since July 2001. Currently, Vinnie is President of PASS - a PAC management consultant firm in Reston, Virginia. Vinnie and Debbie have three daughters, Maggie, Emmie, and Addie.  Vinnie serves as a Sunday Coordinator monitor on Sunday mornings and leads the set-up/tear-down of chairs for Sunday services. Debbie teaches 3's and 4's Sunday School, is part of the Care & Comfort ministry and teaches history at Chieftain Institute.  


Sam Vasa

Sam has spent much of his life in the Washington DC area and lives in Olney. He has been working in the television broadcasting industry for over 25 years, currently as the Deputy Director of Engineering. He's been married to Latha since 1988; they are blessed with two sons Seth and Shem. For the last 10 or so years the Lord has bestowed His talents upon Sam thus enabling him to share the Word of God with a powerful anointing wherever the doors are opened. Sam also has served as Deacon (and Deacon Chair), church council member, and school board vice chair in his previous church. He loves to both attend and teach in our ACE classes.


Matthew Vile

Matthew has attended Derwood Bible Church with his family (Karen, Hannah and Malachi) since 2003 after moving to Maryland from Louisiana. Matthew current serves on our Tech and Security teams and often helps the chair team break down after Sunday morning worship services.  Matthew works as the Sr. Director of Research and Analytics at Goodwill Industries International, Inc.. In addition to leading the department to meet its strategic goals, Matt is primarily responsible for authoring and managing internal and external surveys as well as consulting on major research projects, maintaining data archives and authoring research reports to help increase understanding of Goodwill practices and outcomes. 

"I look forward to serving the body at Derwood Bible by working along side the deacons to address the many physical and managerial tasks necessary to keep our campus functioning well. I also look forward to learning and growing with the deacons and elders as a team that is dedicated to the church family."