Our Staff

Our gifted support staff works together to maintain ministry with the pastors and others on a weekly basis. This team excels at administration and helping to shepherd a large number of volunteers. Click on their email below to contact them directly.

Shelly Schaller

Executive Administrator

Shelly assists the Lead and Associate Pastors, serves as  coordinator for communications and events, and oversees the administrative team. She also partners with her husband, David, in missions. Prior to coming on staff in early 2012, she and David served as COD missionaries in Southeast Asia for nearly 20 years. Shelly majored in Communications at Wheaton College and earned an M.A. in Intercultural Studies from the same institution. She and David have three sons.
work: 626 914 4646 x23

Careth Trerise 

Kids & Student Ministries Admin Assistant

Careth provides administrative support for our active Children’s and Student Ministries. She joined our staff in 2011, and led our Children’s program as Interim Director for over a year. Careth was raised here at COD, and married her husband Tim here on campus. They have three children who have also grown up at COD.
work: (626) 914-4646 x14

Judy Cocoris

Assistant to the Pastor of Discipleship and Community

Judy supports our Assistant Pastor of Discipleship and Community Development and oversees our ministry to seniors. Judy has been a member of Church of the Open Door for over 35 years and served as Executive Administrator for 17 years. She attended Tennessee Temple College, majoring in music. She loves to sing and teach the Bible. Before coming on staff at COD, Judy worked at Thru the Bible Radio for five years in the publication department. She has three children and nine grandchildren whom she adores.
Work: (626) 914-4646 x17

Nicole Bernardini

Graphic Designer & Website Coordinator 

Nicole designs our website and provides graphic art support to our ministries. She came to COD with her family in 2002 for the AWANA program. She recently graduated from Cal State Fullerton with a BFA in Graphic Design.
Email: nmbernardini@gmail.com

Lee Ann Jackson 

Social Media Coordinator

Lee Ann manages our social media presence and provides direction to the promotion of church news and events. Lee Ann works full-time with the Ambassador Advertising Agency while assisting COD remotely. She has served in this role since 2007.

Melissa Muller

Nursery Coordinator

Melissa administrates and shepherds our nursery ministry, and oversees childcare for several ministries and events on campus, including Growing Up Mom (GUM) and Awana. She and her husband, Alan, have two daughters and were drawn to COD a few years ago by our Kids Ministry.
Email:  melissa.muller@churchoftheopendoor.com

Cesar Orozco


Cesar is Jeremy’s right hand man, working to maintain our property and provide support for numerous on campus events. Cesar and his wife, Guadalupe, have five children.

Tiffany Czarnota

Tiffany serves as our receptionist and also provides administrative support.. She and her husband, Clint, came to Church of the Open Door in 2008. They lead our AWANA ministry and also serve in our coffee shop. Clint and Tiffany have been married for 15 years and have two sons. Outside of church, you are likely to find the Czarnota family at a sporting event.   
Email: tiffany.czarnota@churchoftheopendoor.com
We currently have the following people serving in our Student Ministries Department:
Ryan Berkman oversees our  Hillside Junior High Ministry
Amanda Collett serves through leading the Hillside Student Ministries worship teams
Greg Loumagne directs our college age group (Kairos)