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Our Pastors


PCOC Staff



Our Pastors:

Rev. Dr. Marshall Zieman

Rev. Dr. Marshall Zieman

Pastor/Head of Staff

A native of the Midwest, Marshall grew up near Kansas City, graduating from Wichita State University with a Bachelor Degree in Business Administration. A Master of Divinity Degree was earned at Trinity Evangelical Divinity School near Chicago. A Doctorate of Ministry Degree was earned at Fuller Theological Seminary in California.

As newlyweds, Marshall and his wife, Becky, served as church planting missionaries in Spain. It was through the encouragement of Spanish elders that Marshall sought ordination to become a pastor.

Marshall’s first call as a pastor was to West Hills Presbyterian Church in Omaha where he was ordained in 1992. He served at West Hills as their Pastor of Children, Families, and Caregiving. Marshall served the next 20 years as an Associate Pastor at Highland Park Presbyterian Church in Dallas, overseeing the ministries of Children, Youth, and Outreach.

Always a proponent of world mission, Marshall has served as a Trustee of The Outreach Foundation of the Presbyterian Church. For the past 25 years, Marshall has travelled with church mission teams to Eastern Europe, Cuba, Central America, and Africa. He has conducted numerous teaching seminars in Hungary, Romania, Slovakia, Belarus, and Moldova on topics related to children’s and youth ministry and pastoral care. In recent years, Marshall has focused his travels in the Middle East, visiting and encouraging the Presbyterian Church in Lebanon and Syria, Iraq, Pakistan, and Egypt. Since coming to Church of the Cross, Marshall has participated in our church’s travels to minister with our partner church in the village of Gnozdovo, in western Russia.

Marshall and Becky have three young adult children. Natalia is married to Cade; they are architects living in Tucson, AZ. Suzanne works in Dallas for a Christian non-profit group, The Akola Project, providing employment and empowerment to women at risk, both in Dallas and around the world in Uganda. Ben also lives in Dallas, working as a landman in the oil and gas industry.

At Church of the Cross, Marshall serves as our primary preacher and worship leader, manages our busy staff, moderates the Session (our leadership body), and is the staff liaison to our Mission Committee.  Marshall loves jazz music, cherry pie, bar-b-que, and talking all things baseball, especially as it relates to his beloved Kansas City Royals.

Dr. Christine Dempsey,  Ph.D.

Dr. Christine Dempsey, Ph.D.

Associate Pastor

Christine was born in Scottsbluff and raised with two mischievous older brothers. She attended college at Nebraska Wesleyan University and earned a Bachelor of Arts degree in History and Music {trumpet, voice and piano). She combined her passion for music and history and attended graduate school at the University of Nebraska Lincoln, studying hymnbooks in the Reformation. Ultimately,  graduating with both a M.A. and Ph.D. in Modern European History with a minor in Chinese History. She worked at both the University of Nebraska and Nebraska Wesleyan for fifteen years teaching classes in European and Asian history. She felt a call to ministry in 2014 and entered the University of Dubuque Theological Seminary where she completed her Master of Divinity degree. While in seminary, she also completed a certification in Clinical Pastoral Education and served clinical hours as a Chaplain at CHI Health St. Elizabeth’s in Lincoln.

Dr. Dempsey married her husband, Mike Dempsey, who is a native of Lincoln. He is a Computer Networking Presales Engineer for Sirius Computer Solutions here in Omaha. They have two sons, Liam, a sophomore at Colorado School of Mines, and Cael, a sophomore at Lincoln East High School.  Liam is a mathematician, violinist, gear head and Twitch streamer.  Cael is an artist, percussionist, wrestler and board game enthusiast.

Someday in the future, Christine wants to get into bird watching, see the Boston Pops on the 4th of July, and hike the pilgrimage route to Santiago de Compostela.

PCOC Staff:

Kristi Treu

Kristi Treu

Director of Music and Executive Director of Vesper Concerts Series

Kristi Treu, Director of Music and Executive Director of Vesper Concerts Series, has a Bachelor of Music degree in piano performance, vocal performance, and music education from Jamestown College in Jamestown, ND. She later went on to earn her Master of Arts degree in vocal performance and choral conducting from George Mason University in Fairfax,VA. As a military spouse, Kristi has been involved in performing and directing music in many places across the U.S. Her husband, Marv, has retired from the Air Force and they live in Papillion with their three daughters.

Heather Berry

Heather Berry

Christian Education Director

Heather moved to Omaha in 2012 when her husband David was transferred here with Union Pacific Railroad. Heather was born in Iowa, but has lived most of her life in Texas, with a short stay in Louisiana due to David’s work. Heather was a stay at home mom for 15 years, but kept herself busy volunteering at church, in the community as a CASA and as a Girl Scout leader. Heather graduated from Texas A&M University with a B.S. in Animal Science and worked for the Houston Zoo as a Zookeeper in the Education Department right out of college. But when she and David started a family, Heather felt called to stay at home to raise their three children. Heather is excited to serve the church and see how God uses her in her new role here at Church of the Cross.

Rock Sumner

Rock Sumner

Business Administrator

Rock Sumner, Business Administrator, is a native of South Dakota and graduated from South Dakota State University – Brookings, SD with majors in Animal Science and Commercial Economics. He worked within the banking industry in both South Dakota and Nebraska as a bank branch manager and loan officer. Rock also has experience in insurance industry having been an agent in western Nebraska for Shelter Insurance Companies and Ohio National Life.

Rock and his family moved to Omaha and joined our church in 1994. He has worked as a trainer for adults, retail management and buying, and is now PCOC’s Business Administrator. Rock has volunteered many hours at PCOC as a member of the Alleluia Singers, as a Deacon, as the Cornerstone dinner cook for many years and moderates our Cross Care team.

As PCOC’s business administrator, Rock works with our Building & Grounds, Safety, Gift & Memorial, Finance and Investment committees.

Rock and his wife Anna have two grown children.

Dana Sloan

Dana Sloan


Dana Sloan is the organist of Church of the Cross. He retired as Minister of Music after a 40 year tenure, during which the program grew to be one of the finest in the area. He holds degrees in organ performance from the Ohio State University and the University of Illinois.
Dana now focuses on providing quality choral and congregational support through his keyboard playing. 

Divorced, Dana leads a rich and fulfilling life as a single, especially as the father of two grown children, Ryan, a cardiac intensive care nurse in Indianapolis, and Ashley, a special education teacher in Papillion. He is also the proud grandfather of three granddaughters, Jessa and Ellie, who live in Papillion, and Isla, who lives in Indianapolis.

Julie Hansen

Julie Hansen

Secretary and Receptionist


 Our leadership is based on the Presbyterian form of government in which ministers and ruling elders chosen by the congregation serve together. Twenty-four elders serve on the Session, each serving a three-year term. Elders also participate on one or more of the eight standing committees, often as moderators.

Building & Grounds

 Gary Lippstreu, moderator 

Christian Education

Brad Gibson, moderator


David Hopp, moderator

Congregational Life

Kris Goodman, moderator


Bruce Cramer, moderator


Carla Fritz – Melissa Marvin, moderators


John Bennett, moderator

Worship & Music

Charlene Meyer, moderator

Clerk of Session

 Marsha Marron

Moderator of Deacons

Don Metzger


Kevin Bunjer

Carla Fritz

Brad Gibson

Ardys Hansum

David Hopp

Gary Lippstreu

Charlene Meyer

Tom Searson


John Bennett

Jim Conway

Jimmy Downes

Kris Goodman

Jean Lynn

Melissa Marvin

Amy Miller

Mitch Pirnie


Valerie Fuller

Ken Kluck

Gary Marron

Karen Metzger

Susan Price

Mike Shannon

Nancy Utman

Josh Versaw

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