The Episcopal Church of the Mediator


Office Hours
Monday to Friday - 8:00 a.m. to 4:00 p.m.  Closed Fridays during July and August.

Rector's Office Hours
Monday to Thursday - 8:45 a.m. to 3:45 p.m.

The Rev. Canon Maria W. E. Tjeltveit, Rector

 The Reverend Canon Maria W. E. Tjeltveit is the rector of The Episcopal Church of the Mediator, having begun her ministry on September 1, 1999. (Her first name is pronounced "Mariah" and her last name is pronounced "Chelt vate".)

Maria is a member of the Moravian-Episcopal dialogue on the national level and is active in Jewish-Christian and Muslim-Christian dialogue.  She has been appointed by the Bishop to be the Ecumenical and Interfaith Officer for the Diocese of Bethlehem.  She graduated from Swarthmore College and the Berkeley/Yale Divinity School.  Before coming to Mediator, she served at St. Matthew's Episcopal Church in Charleston, West Virginia; St Paul's Episcopal Church in Alexandria, Virginia; and St. Andrew's Episcopal Church in Harrington Park, New Jersey.

Maria, her husband Dr. Alan Tjeltveit, who is a Professor in Psychology at Muhlenberg College, and their children, William and Anna, live in Allentown.

You can reach her at the church by phone (610) 434-0155 and by email at  Her day off is Friday.

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The Rev. Twila Smith, Missioner for Growth

A recent graduate of the Church Divinity School of the Pacific in Berkeley, Twila was ordained to the priesthood in the Diocese of Oklahoma in August 2014, just before beginning her role with Mediator.  She is nourished in common life as a life-professed member of a non-residential religious community of men and women, following the work of St. David Pendleton Oakerhater in ministries of reconciliation.

While in San Francisco, Twila served at St. Aidan's, a mission-focused parish engaged in its neighborhood and surrounding community, and was the missioner for the Celtic Cross Society at the seminary, funding small-dollar grants and engaging the community in hands-on mission. In the summer of 2013 she went on a 30-day, 490-mile pilgrimage around the San Francisco Bay, visiting 70 Episcopal churches, and exploring the sacredness that is in our midst. She has trained and worked in community outreach and development, and building neighborhood partnerships, particularly in multicultural environments. 

Twila stands "always and everywhere" due to a spine issue - and says she has never found that God needs her to sit to be able to serve.  She delights in cooking and feasting with friends and strangers, and continues to fall more in love with God and the church. ↑ Return to Top


J. Clinton Miller, Organist/Choirmaster

 J. Clinton Miller, S.M.M., Organist/Choirmaster holds degrees from Ohio Wesleyan University in Delaware, Ohio and The School of Sacred Music of the Union Theological Seminary in New York City. During the 1950s he served as Assistant Organist/Choirmaster of Trinity Episcopal Cathedral and subsequently, Director of Music for Grace Lutheran Church both in Cleveland, Ohio. For twenty-seven years he was Organist/Choirmaster of Saint John Lutheran Church in Allentown where, in addition to his regular responsibilities, he established a church related concert series which flourished for twenty years performing many of the masterpieces of the sacred choral repertoire and presenting concert organists and other artists of international stature.

For twelve years he served as organist of Temple Beth El in Allentown and in the early 1990s served a one year appointment as Organist/Choirmaster of the Cathedral Church of the Nativity in Bethlehem. He was University Organist and taught organ (adjunct) at Lehigh University from 1994 until 1998. For six years he was Organist/Choirmaster of Grace Lutheran Church in East Stroudsburg, PA and prior to his coming to Mediator was Organist/Choirmaster of The Episcopal Parish of Saint Mark and Saint John in Jim Thorpe, PA (2000-2003).

He is a past State and Regional Chairman and member of the National Council of the American Guild of Organists (AGO) and served two separate terms as Dean of The Lehigh Valley Chapter of the Guild. He has presented organ recitals and conducted workshops and seminars in many of the Northeastern and Mid-Atlantic states.

His community activities have included serving on the board of Lehigh Valley Arts Council (1980-83), Musical Advisor to the Director of the Allentown Art Museum (1976-83), and member of the Lehigh County Historical Society where he occasionally served as advisor with regard to the restoration of period instruments and volunteer harpsichordist. From 1995 until 2003 he was an on-air programmer, and, for five years, Genre Coordinator, for radio station WDIY, a National Public Radio affiliate in the Lehigh Valley.

Clint can be reached by e-mail at:

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Liz Hersh, Missioner for Children and Youth 

Elizabeth Hersh began as our Missioner for Children and Youth on June 17, 2013. As a long-time member of the parish, Liz is known to many of us.

Liz has been involved with Sunday School at Mediator for many years, moving from Vestry Christian Education liaison to Sunday School teacher. Unlike some people who become stale when they do something for a long time, Liz is continually looking for ways to renew and improve our ministry to children and youth. She researched, trained for, and implemented the Catechesis of the Good Shepherd Level 1 at Mediator over a decade ago.  In the last couple of years, Liz expanded Catechesis to the early elementary level.  She got the extensive training needed for Catechesis of the Good Shepherd Level 2 and has worked hard to create our True Vine Atrium for ages first through third graders.

While Liz’s ministry has focused on Sunday School, her husband, Joe, is a J2A mentor, and her sons, Chris and Adam, both went through the full Journey to Adulthood program. So she is familiar with the range of our children and youth ministry.

Outside of Mediator, Liz earned her Bachelor of Science degree in Nursing from Cedar Crest College in 1979.  At present. Liz works part-time at The Village Preschool, in Zionsville, keeps the books for Joe’s handyman business, and works with Bill Korp, our bookkeeper in his accounting business. In the community, she is active in the Boy Scouts of America serving on the committee for Boy Scout Troop 70 in Emmaus.   Return to Top 


Jo Trepagnier, Office Manager

 Jo Trepagnier began as our Office Manager on Wednesday, May 29, 2002. Jo has worked for E. I. duPont de Nemours & Company in information technology management and personnel administration. She and her husband, Trip, are natives of Delaware. For the past few years, she has been home with their children: Cal and Nathalie. The Trepagniers live in Emmaus and are members of Cathedral Church of the Nativity. Jo has many gifts to share, and we welcome her to this new ministry with us.

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William Korp, Bookkeeper

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Mickey Zedowski, Sexton - Maintenance


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Dianne Ruch, Sexton - Housekeeping

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Eva Bednarczyk, Nursery Attendant

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Madeline Hain, Children's Chapel


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George B. Miller, JFK Director

 George B. Miller began his work with us as JFK Director on September 22, 2009. He returned from several years spent working in Ireland at that time.  Before relocating to Ireland in 2006, George was the Executive Director of the Old Allentown Preservation Association, as well as Manager of the state Elm Street Program.

George is a graduate of Rutgers and Princeton Universities. In Galway, he served as Director and Educator for Alá Theatre & Education Project. He was the Artistic Director with the original Theatre Outlet in Allentown for 15 years, and worked closely with non-profit organizations and volunteers, both young people and adults. George and his wife Kate Scuffle are happy to return to the Lehigh Valley where they will continue to work in community arts.

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