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About Us


Pastor Patricia (Pat) Geiseman

Senior Pastor

Pastor Pat was born and raised in Peoria, Illinois. In 1976 she graduated from Carthage College and from the Lutheran School of Theology at Chicago in 1980. Pastor Pat served two parishes, one in northeastern Ohio and the second in Elgin, Illinois, before accepting the call to serve at St. Mark's in 1996. She is married to Edward Hunter; and they are the parents of two sons.

Pastor Pat was called to St. Mark's in 1996.

Pastor Pat can be contacted at: Phone Ex. 15

Pastor Paul Olson

Interim Pastor

Pastor Olson brings an abundance of pastoral gifts, experience, and wisdom. He has been ordained 44 years and has served in various capacities, including three senior pastorates. Pastor Olson also served as the Capital Campaign and Cornerstone Foundation Director for Lutheran Social Services of Illinois. Recently, Pastor Olson completed interim positions at Immanuel in Evanston and Bethlehem in Elgin.

Throughout his pastoral career Pastor Olson has been active in synodical and community organizations, such as Rotary Club. His primary gifts include preaching and worship leadership, administration, and stewardship.

Pastor Olson is married to Evelyn, they have four living children and nine grandchildren. The Olsons live in Carol Stream.

Pastor Olson can be contacted at: Phone Ex. 13

Ms. Deb Arcilla

Office Manager

Deb Arcilla is a 1979 graduate of Luther College, receiving a Bachelor of Arts degree in Social Work. Deb’s career includes being a Peace Corps Volunteer in the Philippines right after college, and then working at two residential children’s group homes for 20 years. She has served at St. Mark’s since 2002, and currently is full time office manager. Deb is widowed, and the mother of three.

Deb can be contacted at Phone Ex. 10

Ms . Kristin Young

Director of Worship & the Arts

Kristin answered the call to serve on the staff at St. Mark’s in 1996 and rejoices in the gift that the past 17 years has been. Kristin also served Illinois churches in Carpentersville, Algonquin and Batavia before coming to St. Marks’s. She also taught and directed the choral program at Faith Lutheran Christian School in Geneva, IL.

Kristin graduated from DePaul University School of Music in 1983 and since that time has also received the Bishop’s Certificate in church music from both the ELCA and the Episcopal church in America

Kristin and her husband Bruce reside in Plainfield, IL and enjoy Florida vacations with their 4 adult children.

You can reach Kristin at Phone Ex. 16

Ms. Sue Hilderbrand

Bell Choir Director

One might say; St. Mark’s and Sue have grown up together. Sue’s parents were Charter Members along with her and younger brother Tim. Sue’s youngest brother Mike was the first Baptism at the Galena and Edgelawn site. After her Confirmation in 1967, the Church Council Called Sue to be Children’s Choir Director. Graduate of West Aurora, graduate of the ELCA Diakonia Program (2006); over the years, Sue has worn many hats. From 1974 to 1979, Sue joined the staff full time with duties as Secretary, Youth Worker as well as Children’s Choir Director. During that time our Music Program was expanded and 2 youth groups were formed. In 1982, Sue began a Handbell Program which has grown from 1 to 3 choirs as well as a handbell/handchime opportunity during the music portion of FDL. In addition to ringing for worship, our Handbell Choirs have done some local traveling. We have rung for Aurora Historical Society’s Christmas Open House, Synod Assemblies, Ken Swanson’s Man of the Year Dinner, Various Christmas Parties; at Country Clubs and Churches, Weddings and Handbell Conferences. Sue resides in Aurora and in addition to her position at St. Mark’s, Sue is employed by Nicor. Sue also sings in The Lion’s Voice Choir, serves as the Leader for Celebration Singers and is the Chairperson for Sanctuary Art and Banner Team. Sue also serves as one of our Prayer Minister and is a veteran of several Youth Gatherings and Youth Mission Trips.

Phone Ex. 24

Ms. Jean Clementz, R.N.

Faith Community Nurse

Jean Clementz, RN is our Provena Mercy Medical Center Faith Community Nurse. As a member of the parish staff, she coordinates the congregation’s health and wellness ministry. Jean’s primary focus is the intentional care of spirit through a “wholistic” view of health, by integrating mind, body, and spirit. Her primary roles as our faith community nurse are to:

  • Serve as a resource for health information through education, advocacy, and personal health counseling.
  • Refer to and facilitate the use of community resources.
  • Encourage others to recognize and share their gifts through volunteering.
  • Jean received her BSN from the College of St. Teresa and MSN from Lewis University. She has lived in Aurora for most of her life. Jean is married to her husband, Chris, and they have two adult sons.

    Phone Ex. 23

    Mr. John Themanson

    Finance Administrator

    John graduated from Illinois State University in 1978 with a Bachelor of Science degree in Applied Computer Science and moved to Wheaton, IL. He and his wife joined St. Paul's Lutheran Church while Ken Olson was the senior pastor there. They moved to Aurora and transferred to St. Mark's. John retired from General Electric in 2005, and worked at a Target store before joining the staff here at St. Mark's in May of 2008. He is a widower with 2 children. John is also a member of the Lion's Voice choir.

    Phone Ex. 19

    Ms. Nicole Ferrier

    Director of Communications

    Nicole grew up in Lombard, Illinois and attended Holy Trinity Lutheran Church, where she enjoyed volunteering with the youth group program run by her aunt and uncle. After attending Columbia College Chicago and obtaining a Bachelor of Arts with a concentration in film producing, marketing, and web design she returned to the suburbs in 2004. She has lived in North Aurora for the past ten years with her son and aunt. Nicole is St. Mark’s Welcoming Council Member and has taught FDL classes for three years. She enjoys participating in Children's Ministry events, Bible studies, and providing backup office support at St. Mark’s. Nicole has been President of the Fearn Elementary PTA and is heavily involved with the North Aurora Mothers Club. She is currently President and has chaired Community Relations, Events, and Marketing; and acted as chairperson for the 2nd Annual North Aurora Community Parade for the NAMC. Nicole has worked in the western suburbs and Chicago in administration, customer service, design, sales, and human resources for the past fifteen years. In addition to her duties at St. Mark's she runs her own online antiques business, sells Thirty-One Gifts, and provides freelance web design and online marketing. She has been a member of St. Mark’s since October of 2011.

    Nicole can be contacted at Phone Ex. 27

    Ms. Kari Reiseck

    Director of Children's Ministry

    Kari grew up in Aurora, IL and attended Eastern Illinois University where she earned a Bachelor of Science in Business as a Marketing major in 1998. She worked at various advertising agencies in the suburbs before having children. Kari has been married to Greg for almost 16 years and has three amazing children. She and her family have lived in Oswego for the last 11 years and has been a member of St Mark's since 2003. Kari has been volunteering with St. Mark's children's programs like Sunday School and VBS for over 6 years. For the last two years she had been working as a preschool teacher assistant in Oswego. She started at St. Mark's as Director of Children's Ministry in August 2014.

    Kari can be reached at Phone Ex. 22

    Mr. Ed Malert

    Facility Manager

    Ed recently joined St. Mark’s at the beginning of 2015. He has lived in the Fox Valley area most of his life. Ed and his wife Jeannie, ironically got married at St. Mark's in 1985. They are the parents of a son, Joey. Ed started in residential construction in 1984 and started his own business of rehabbing homes and managing rental properties in 1987. In 2002, Ed was called to be the maintenance supervisor for Sonlife Ministries, a campus retreat in Elburn Illinois. While working there he started a small lawn care service. Ed and his family love the outdoors and are die-hard Packers fans!

    Ed can be contacted at Phone Ex. 12

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