Our Staff

John Marc Wiemann

Lead Pastor

Pastor John Marc grew up in a family of eight in Silver Spring, Maryland. His triplet sisters became Christians and faithfully shared the gospel with him. In his junior year of high school, John Marc embraced Jesus Christ as his Savior and Lord.

He graduated from the U.S. Naval Academy and was commissioned as a Naval Flight Officer in 1986. After eight years of active service, John Marc left the full-time Navy to go to seminary and prepare for pastoral ministry. He continued to fly in the Navy Reserves with Patrol Squadron 65.

He graduated from The Master's Seminary in 1997 and served as the Associate Pastor for Adult Ministries at Faith Community Church in Santa Clarita, California for three years.

John Marc accepted the call to pastor Cornerstone Community Church in July of 2000. He is deeply committed to expository preaching, biblical counseling, and training leaders.

In July of 2006 he retired from the Navy Reserves having completed 20 years of service. John Marc and Paula have been married since 1988 and have four children, and two grandchildren.

John Marc enjoys time with his family, playing sports, outdoor activities, and being with people. His favorite verse is Psalm 16:11 “In His presence is fullness of joy.”

Dan Burleson

Associate Pastor of Children's Ministries

Dan Burleson grew up in Thousand Oaks, California. His grandparents led him to the Lord at an early age. They continued to minister to him as he grew up.

Dan graduated from the Master’s College in 1989 with a B.A. in Bible/Youth Ministries and from Talbot School of Theology in 1997 with a M.A. in Christian Education.

Dan was the Associate Pastor overseeing youth and Christian Education at Bethany Baptist Church in Thousand Oaks, CA for 10 years, Children’s Pastor at EV Free Church in Newbury Park, CA for 11 years, Associate Pastor at Sunrise Community Church and Administrator for the EFCA Southeast District Office in Atlantic Beach, Florida for 5½ years, and Children’s Pastor at First Free Church in Manchester, Missouri for 2½ years.

Dan came to Cornerstone in April 2015 as Associate Pastor. He administrates the Cornerstone Biblical Counseling Training Center, oversees our Children’s Ministries, and is helping with the transition into our new church facility.

Dan and Maria have been married since 1991 and have three children. Dan enjoys spending time with his wife and kids, working out at the gym, and watching suspenseful movies.

Dan’s favorite verse is 2 Corinthians 5:21, “He made Him who knew no sin to be sin on our behalf, so that we might become the righteousness of God in Him.”

Adrian Garcia

Associate Pastor of Student Ministries and Missions

Adrian Garcia grew up in a family of nine kids in Torrance, California. His oldest brother became a Christian and shared the gospel with him at an early age. At the age of twenty-one, Adrian realized he was a sinner at enmity with God. He cried out for mercy and placed his faith in Jesus Christ as Lord and Savior.

Shortly after becoming a Christian, Adrian was given a hunger and desire to know God’s Word. This resulted in reading, studying, and utilizing sound resources to understand the Scriptures as much as possible. At the same time, there was an eagerness to serve wherever needed within the local church. In God’s providence, Adrian was directed to Student Ministries and has served both as a small group leader and Pastor for a combined twelve years.

By God’s grace, his aspiration to comprehend more of God’s Word led to an opportunity to study at The Master’s Seminary, where he is currently a student.

Adrian and Ashley have been married since 2011 and have three boys: Ezra, Eli, and Ezekiel. Adrian enjoys reading, exercising, and spending time with his family.

Adrian’s favorite verse is Psalm 121:5, “The Lord is your Keeper, He is your shade on your right hand.”

Jesse Howard

Associate Pastor of Music & Discipleship

Jesse was born in Colorado Springs, Colorado, into a loving Christian home. His parents faithfully presented Christ to him, and at an early age he accepted Christ as his Lord and Savior. God provided amazing men to disciple Jesse over the years allowing him to grow in his knowledge and love of the Lord. Jesse grew up an avid tennis player, but at the age of 16 started experiencing chronic back pain that has remained with him since that time. God used this trial to draw Jesse into a deeper relationship with Himself as well as put him on a path in the music industry. It was also at this time that he met his future wife, Ali. Ali and Jesse enjoyed seven years of friendship and dating before getting married in 2011.

Jesse moved to Nashville in 2010 to pursue his music career. While in Nashville, God blessed Jesse with wonderful opportunities to perform and record with many different artists. After 5 years, Ali and Jesse felt the Lord calling them to seminary. They moved to Los Angeles to attend The Master’s Seminary. After four-and-a-half years of school and working at TMS, Jesse and Ali connected with Cornerstone. With his background in music and his love for discipleship, Jesse joyfully joined the pastoral staff in August of 2019, as the Associate Pastor of Music and Discipleship.

Ali and Jesse have one daughter. He loves spending time with his family, gardening, being outside, playing guitar, studying God’s Word, and reading.

Jesse’s favorite verse is Romans 5:3-5. “And not only this, but we also exult in our tribulations, knowing that tribulation brings about perseverance; and perseverance, proven character; and proven character, hope; and hope does not disappoint, because the love of God has been poured out within our hearts through the Holy Spirit who was given to us.”

Liesl Waldrum


Liesl grew up in an active and loving Christian family in Lubbock, Texas. She came to faith in Jesus Christ and was baptized at the age of 13. After high school she attended Lubbock Christian University.

She married Bill and moved to California shortly thereafter. Liesl obtained her California Court Reporting license in 1993 and worked as a freelance reporter until 1994. Through a sudden temporary move to Massachusetts, the Lord enabled Liesl to be a stay-at-home mom. She homeschooled her children from birth through high school and loved it. Liesl started as the secretary at Cornerstone in 2015.

Liesl and Bill have been married since 1988 and have two daughters. Spending time with family, baking, classic movies,and visiting Yosemite are Liesl’s favorite activities.

Liesl's favorite verses are found in 1 Peter 1:3-5, “Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead, to obtain an inheritance which is imperishable and undefiled and will not fade away, reserved in heaven for you, who are protected by the power of God through faith for a salvation ready to be revealed in the last time.”

Jen Kramer

Bookkeeper & Website Manager

Jen Kramer grew up in a Christian family and came to faith in Christ at an early age. She was born and raised in San Luis Obispo County and went to school at Lillian Larsen in San Miguel and Paso Robles High School.

She has been enjoying office work since she graduated from high school in 2003. She married her high school sweetheart, Eric Kramer, in 2005. They have a son and daughter who have grown up at Cornerstone.

Jen enjoys singing, crafting, writing, toying with graphics, and playing games with others. Her favorite verse is Romans 8:28-31 “And we know that God causes all things to work together for good to those who love God, to those who are called according to His purpose. For those whom He foreknew, He also predestined to become conformed to the image of His Son, so that He would be the firstborn among many brethren; and these whom He predestined, He also called; and these whom He called, He also justified; and these whom He justified, He also glorified. What then shall we say to these things? If God is for us, who is against us?”

Charlotte Sanchez

Office Assistant

Charlotte Sanchez grew up in a Christian home and accepted Christ at an early age. She was raised in Ventura County, CA, and moved to Atascadero in 2001. She has been married to Phillip, her best friend, since 1995. They have been part of Cornerstone Community Church since June of 2001. She homeschooled their three daughters, and two of them are now in college.

She works part time in the church office, and really enjoys it! In her free time, she loves to camp, hike, run, and spend time with her family.

Her favorite passage is 1 Thessalonians 5:16-18, “Rejoice always; pray without ceasing; in everything give thanks; for this is God’s will for you in Christ Jesus.”