Cornerstone Leadership Team


The Leadership Team

Adam Howard

Adam grew up in Southern California and began attending the Master’s College in 2007. He received his Bachelor of Arts in Biblical Studies with an emphasis in Expository Preaching in 2010, during which time he served as the school chaplain and on various outreach ministries. Adam began his involvement with Cornerstone in 2009 through short-term outreach, after which he and his family moved to Wyoming in 2011. Since then, he’s had the privilege of overseeing some of the outreach ministries, web and media, and is currently discipling other men and overseeing a Gospel Community Group. Adam is a creative professional, enjoys taking in the scenery and spending time with his wife, two sons, and daughter.

Bryan Chassard
Pastor of Youth Ministries 

After graduating from Penn State University with a BS in Therapeutic Recreation, Bryan taught adaptive skiing for 3 years in Winter Park, CO and directed the adaptive ski program for 3 years at Teton Village in Jackson, WY. Bryan moved to Jackson Hole in the summer of 2000 and has lived there since, except for his time in graduate school. He finished his Master’s of Divinity degree from the Master’s Seminary in the spring of 2008, during which time he interned in the children’s ministries at Grace Community Church in Sun Valley, CA (2003-2008). Bryan met his wife Ashley during his last year of seminary while she was attending the Master’s College and both of them have served on the original church planting team of Cornerstone since. In 2015 Bryan was ordained for ministry at Cornerstone Church. Currently, he serves as the Pastor of Youth Ministries at Cornerstone and leads a Gospel Community Group.  Bryan and Ashley have two sons, Ezra and Leo. In his spare time he enjoys being with his family in the outdoors and playing with his young sons.  He also enjoys rock climbing, mountaineering, and back-country skiing occasionally but not as much as he enjoys serving the Lord and the local body at Cornerstone.

Colby Stevens

Colby grew up in Canton, GA and earned his bachelor’s degree at Kennesaw State University before marrying his wife Lucy and moving to Jackson. He and  Lucy have attended Cornerstone since they moved west in 2011. Colby leads a Gospel Community group, teaches youth Sunday School, and enjoys discipling and shepherding men in the church. His hobbies include biking, hiking, spending time in the outdoors with his family, serving his church, and savoring a good cup of coffee.  Colby and Lucy have one daughter, Willa.

Pastor Eric Davis

Eric Davis
Teaching Pastor

After graduating from Oregon State University, Eric moved to Jackson Hole in 1999. While earning a Masters of Divinity from the Master’s Seminary, he served in the Crossroads College ministry at Grace Community Church. Eric and his wife, Leslie, also served as dorm staff at the Master’s College from 2004-08, during which time he also served as adjunct faculty. In 2008, Eric was ordained for pastoral ministry at Grace Community, immediately after which he and a team of 10 left southern California to plant Cornerstone Church in Jackson Hole. Since then he has served as pastor of Cornerstone. He also holds a Masters of Arts in Biblical Counseling from TMC and is a level 2 certified counselor through the Association of Certified Biblical Counselors. Eric is also a regular contributor at the Cripplegate blog ( In his spare time, he enjoys camping with his family, skiing, mountain biking, and chopping wood. Eric and his wife have three children.

Matthew Mumma, pastor, Biblical Counselor

Matt Mumma
Pastor of Counseling, Pastoral Assistant, 

Matt earned his undergraduate and graduate degrees in Biblical Counseling from The Master’s College. He is also a Level 2 certified counselor through the Association of Certified Biblical Counselors. Matt and his wife have served on the original planting core team of Cornerstone since 2006. In 2014 Matt was ordained by Cornerstone Church for pastoral ministry. He currently serves as the pastoral assistant and pastor of biblical counseling. He also leads a gospel community group. In his spare time, he enjoys spending time with his family, studying theology and counseling, and fixing his house. He and his wife, Sera, have one son and three daughters.