Our Team


Tara-Leigh CobbleHeadshot copy

D-Group Founder & President

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 is a member of All Saints Church (Anglican Mission). 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

BRIAN
SHAKLEY

Men's
Director

JOELLE
SMITH

Administrative
Assistant

callie-summers ShakleyBrian IMG-0115.JPG
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. 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. 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.

JENN
SPARKS

New Leader Training
Coordinator

KATIE
WEBBER

New Leader Training
Coordinator

KIM
ABELSON

New Leader
Training

jennsparks katie KimAbelson

SISSY
SHAKLEY

New Leader
Training

JESSICA
MASTERS

New Leader
Training

KEN
GARRISON

Men's New Leader
Training

SissyShakley  Jessica Masters KenGarrison

BRIAN
SHAKLEY

Men's Video + 
Theology & Resources

JD
SMITH

Men's Video
Leader

ARLETTE
BLACKWELL

Spanish 
Language Director

brian JD Smith 200 x 200 ArletteBlackwell

ALLISON
CONGDON

Audio
Tech

MORGAN
YOUNG

Podcast
Design

DINAH
VAUGHT

Leader
Care

Allison Congden, AUDIO TECH EVENTS HOSPITALITY INTERN NE Morgan Young DinahVaught

RACHEL
MANTOOTH

Events
Admin

KAREN
MERRY

Spring Retreat 
Hospitality

JUDY
HEATH

Spring Retreat
Hospitality

rachelmantooth Karen Merry, Events Hospitality NE.JPG JudyHeath.JPG

JILL
DOLBERRY

Social
Media

MELISSA
WOODRUFF

Graphic 
Design

BRITTNEY
MURRAY

Graphic
Design

JillianDolberry  Melissa Woodruff - Social Media Assistant Brittney Pic 250x250

LAUREN
MULFORD

Theology Curriculum 
& Resources

KAREN
MERRY

Theology Curriculum 
& Resources

JENNIFER
KLEABIR

Theology &
Resources

Lauren Mulford - Theology Intern Karen Merry, Events Hospitality NE.JPG JennyK

SARA 
ARNETT

Theology & 
Resources

LEYDA
MARTINEZ

Spanish
Translation

JEANNINE
FRANCO

Curriculum
Editor

SaraArnett LeydaMartinez  Jeannine Franko Headshot 250