Our Team

Tara-Leigh CobbleStaff - TLC

D-Group Founder & CEO

Her earliest memory is learning John 3:16 from her mom, shortly before her brother led her to Christ. Despite an early introduction to Christianity, she wasted years coasting on the second-hand information she learned from others. In 2008, through the gentle encouragement of a friend, she read all the way through the Bible for the first time. That changed everything. "I wanted and needed people alongside me in my pursuit of God -- people to hold me accountable for scripture memory and Bible reading and all the things that were bringing me so much newfound joy!" Out of that need, she started D-Group with a handful of strangers in a living room in 2009. She lives in Dallas, TX, where she has no pets or children - or anything else that might die if she forgets to feed it. 


CALLIE
SUMMERS

Executive
Director

JOELLE
SMITH

Logistics
Manager

Staff - Callie Staff - Joelle
She grew up in a Christian home with loving parents, but her faith became her own in college. Her hunger for the Word of God flourished and she discovered the power of Christian community and discipleship relationships as catalysts for spiritual growth. A native Texan, she loves the beach and the mountains, and enjoys hiking, camping, and hammocking. She is a voracious podcast listener and book reader. She is excited to join staff and is thrilled to be used by God to strengthen His kingdom! Callie is a member of Watermark Community Church in Dallas. Though raised in the church, her life didn’t always reflect Gospel transformation. At a low point in her early twenties, two women approached her on the beach to remind her of God’s love for her. His pursuit of her never felt more real, and she began to fall in love with Him, the One who heals and restores. Shortly after that, she joined D-Group -- and even five years later, she still counts it among her best decisions. Her desire is to live out the words of John the Baptist: “He must increase, but I must decrease” (John 3:30). Joelle is a member of Providence Wesleyan Church in Summerville, SC.

RACHEL
MANTOOTH

Administrative
Coordinator

COURTNEY
VAUGHAN

Senior
Management

Screen Shot 2019-10-19 at 8.06.48 PM Staff - Courtney
As the daughter of a Minister of Music, Rachel grew up being at the church "every time the doors were open." She became a Christian at the age of six but it wasn't until joining D-Group that she was truly challenged with the question, "Is what I believe deeply rooted in scripture or is it just what was taught to me as a child?" Through processing that question, God strengthened the truth of her faith and gave her a burning desire to know Him and His Word more. Rachel lives with her husband, Chase, and their two sons in Simpsonville, SC. They are members of Newspring Church in Greenville. Although she has been a Christian since she was a young child, Courtney spent the majority of her Christian life checking the boxes she believed would make her a “good, moral Christian.” Since joining four years ago, The Lord has used D-Group to graciously show her more of Himself and to radically transform her concept of what it means to be saved by grace alone, through faith alone. She and her husband Dustin, along with their daughter Foster, split their time between Dallas and San Antonio. They are members of First McKinney Baptist Church.

LAUREN
MULFORD

Theology &
Content Director

BRIAN
SHAKLEY

Men's
Director

lauren mulford headshot Staff - Brian Shakley
Lauren came to trust Christ with her salvation at the age of seven. She trained to be a professional ballet dancer with Ballet Magnificat and served as a missionary with them for three years traveling across the USA. She later went on to receive her bachelor’s degree in biology from the University of Texas at Arlington where she met her husband at a Bible study. D-Group catapulted her to “love God and love people” more than she had ever previously while maintaining doctrinal soundness. Her family of eight attends Hope Fellowship in Denton, TX. Through leadership roles in various ministry organizations such as Youth for Christ and Campus Crusade for Christ, as well as continued involvement in local churches, Brian has developed a passion to see others cultivate a deeper faith through discipleship. Whether in youth ministry settings or peer-to-peer groups, he has seen the fruit of a structured, intentional approach to building relationships within the Church. He is married to Sissy, who is also a D-Group leader, and they currently live in Chattanooga, TN, where they are members of Calvary Chapel Chattanooga.

JENN
SPARKS

New Leader Training
Coordinator

KATIE
WEBBER

New Leader Training
Coordinator

KIM
ABELSON

New Leader
Training

jennsparks katie KimAbelson

KIM
MATTHEWS

New Leader
Training
 

MARC
OGLESBY

Men's New Leader
Training

WARWICK
FULLER

Men's Video
Leader
 

Kim Matthews marc2 Warwick Fuller 250x250

JD
SMITH

Men's Video
Leader

ALLISON
CONGDON

Audio
Tech

MORGAN
YOUNG

Podcast
Design
 

JD Smith 200 x 200 Allison Congden, AUDIO TECH EVENTS HOSPITALITY INTERN NE Morgan Young

ALY 
DECKEN 

 Curriculum Editor
+ Social Media

ALLISON 
KEE 

Curriculum
Editor

JESSICA
LARSEN

Social
Media
 

AlyHeadshot IMG_7821.JPG Larsen_Professional Photo

SALLY 
PHILLIPS 

Social
Media

MATT 
RISTING 

Social Media +
Theology & Resources

RANDI 
MARIE 

Graphic 
Design 

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BRITTNEY
MURRAY

Graphic
Design

KAREN
MERRY

Theology Curriculum 
& Resources

ANNIE
VILJOEN

Theology & 
Resources

Brittney Pic 250x250  Karen Merry, Events Hospitality NE.JPG  Annie Viljoen

SARA 
ARNETT

Theology & 
Resources

ARLETTE
BLACKWELL

Spanish Language 
Director

ARELI
DURAN

Spanish 
Translator

SaraArnett Arlette Tenorio Spanish Video Intern image1

STEFANY
TENORIO

Spanish 
Translator

ROSA
PILLCURIMA

Spanish 
Translator

KRISTEN
HANSON

New Leader
Training
 

Stefany Roseheadshot Kristen Hansen headshot

JOHANNA
MUSGRAVE

Song 
Writing

MISTY
CUNNINGHAM

Theology & 
Resources
 

 
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