Clergy and Staff

The Reverend Sean E. Mullen, Rector

Father Sean Mullen came to Saint Mark's in August of 2002 to serve as Curate, and in November 2006 was elected 14th Rector of the parish. Before coming to Philadelphia, Father Mullen was the Chaplain to the Most Rev. Dr. Peter Carnley, Archbishop of Perth and Primate of the Anglican Church of Australia (1998-2002). Prior to that he was Assistant Rector of All Saints Church in Richmond, Va (1996-1998).

Father Mullen is a graduate of the College of William and Mary in Williamsburg, Va. (1989) and of the General Theological Seminary in New York (1996). He serves as President of the Board of St. James School, of which he is also a co-founder. He also serves on the Board of the Society for the Advancement of the Episcopal Church in Pennsylvania, and he is Assistant Chaplain to the First Troop Philadelphia City Cavalry.

The Reverend Dr. Nora Johnson, Priest Associate for Adult Formation

Mother Nora Johnson has served at Saint Mark's since her ordination to the priesthood in 2013; as Priest Associate, she oversees ministries of Adult Education and Formation. She earned her master of divinity degree from the General Theological Seminary in New York, having begun those studies at the Lutheran Theological Seminary at Philadelphia. Mother Johnson has served at Trinity Church, Swarthmore, and as a seminarian and lay associate at the Church of the Crucifixion, Philadelphia.

Mother Johnson is Professor of English at Swarthmore College, a position she held throughout her theological studies and continues to hold while serving in ordained ministry. She holds a doctorate from the University of California, Berkeley, and a bachelor's degree from the University of California, Los Angeles. She is a scholar of English Renaissance drama. With her wife Leslie, Mother Johnson lives in Philadelphia and presides over a herd of cats, goldfish, and a little terrier named Tipper who is sometimes seen around the church grounds.


The Reverend Stephen Moore, Priest Associate for Pastoral Care

Father Stephen Moore has served at Saint Mark’s since 2017, where he is responsible for ministries of pastoral care, including the Neighbor Care program. Ordained in the Anglican Diocese of Newcastle in New South Wales, Australia, Fr. Moore trained at Saint John’s Anglican Seminary after gaining earlier degrees from the University of New South Wales, where he majored in English literature. He is licensed as a chaplain to the Australian Defense Force.

Fr. Moore was co-founder and assistant rector of the Newcastle chapter of the Australian province of the Society of Catholic Priests, is a professed tertiary of the Third Order of Saint Francis, and initiated in 2005 the Australian Bonhoeffer Conference and co-founded the Australian Journal of Bonhoeffer Studies in 2013.

Fr. Moore also serves part-time as priest-in-charge of Trinity Church, Gulph Mills, in King of Prussia, Penn.


The Reverend Nicholas B. Phelps, Assisting Priest

Father Nicholas Phelps, a priest of the Diocese of Pennsylvania, has been an Assisting Priest at Saint Mark's since 1999.

Before coming to Saint Mark's Church, Father Phelps served as Rector of Saint James Episcopal Church, Bristol, Penn. (1981-1998); Rector of Trinity Church, Buckingham, Penn. (1970-1980); Episcopal Chaplain, University of California, Los Angeles (1964-1970); Assistant Chaplain, University of California, Los Angeles (1962-1963); Vicar, Saint Andrews Church, Blackinton, Mass. (1961-1962); and Assistant Rector, Saint John's Church, Williamstown, Mass (1959-1962).

Father Phelps attended the Episcopal Theological School in Cambridge, Mass., receiving his master of divinity degree in 1959. He received his bachelor's degree from Williams College in Williamstown, Mass. in 1956.

Robert McCormick, Organist and Choirmaster

Robert McCormick, described by Choir and Organ as “indomitable and immensely gifted” and as “an artist of rare sensitivity and passion” by the Macon (GA) Telegraph, has served as Organist and Choirmaster of Saint Mark's Church since 2016. From 2008 to 2016, he served as Director of Music at St. Paul’s Parish, K Street, Washington, D.C. At St. Paul’s he conducted the various choirs of adults, boys, and girls in approximately 175 choral services yearly (including weekly Evensong, year-round). From 2001 to 2008 he served as Organist and Music Director at the Church of St. Mary the Virgin, New York City.

Mr. McCormick holds the Bachelor of Music degree in organ performance, summa cum laude, from Westminster Choir College, Princeton, N.J. Concurrently, he was Assistant Organist at Trinity Church, Princeton. His teachers have included McNeil Robinson and Robert Carwithen.

Known for his ability in organ improvisation, Mr. McCormick was named a semi-finalist in the 2005 St. Albans International Organ Festival Improvisation Competition. Concert appearances across the United States include the Summer Organ Festival at The Riverside Church (New York City), the Jongen Symphonie Concertante and Barber Toccata Festiva with the Macon (GA) Symphony Orchestra, the Pittsburgh Organ Artists Series, the East Texas Organ Festival, Basically Bach Festival at St. Peter’s Lutheran Church (New York City), the Great Organists series at St. John’s Cathedral in Albuquerque, a New York City Pipe Organ Encounters, the Atlanta Summer Organ Festival, and recitals and workshops for local American Guild of Organists chapters nationwide. He has been a featured artist and clinician at numerous conventions and conferences of the AGO, the Association of Anglican Musicians, and the Royal School of Church Music in America, playing recitals and services, and leading workshops in choir training, service playing, and organ improvisation. As a composer, his choral works are published by Encore (UK) and Selah, and have been performed on both sides of the Atlantic.

He served for two years as sub-dean of the New York City chapter of the AGO and is a member of the Alumni Council of Westminster Choir College. He was co-chairperson of the 2014 National Conference of the Association of Anglican Musicians. His recording from St. Paul’s, K Street, We Sing of God, was released in June 2010 on the Pro Organo label. Choir and Organ’s review of the album describes the choir as “one of the most responsive and adaptable choirs on the Eastern seaboard” and further states that “[McCormick] also shines at the organ.” Under his direction, the St. Paul's Choirs have sung at conventions of the AGO, the Organ Historical Society, and the Association of Anglican Musicians, and have been heard nationally on the radio programs Pipedreams and With Heart and Voice.


David Heinze, Gerre Hancock Fellow in Church Music

David graduated with a Bachelor of Music in Organ Performance from Hope College (Holland, Michigan) where he studied the organ with Huw Lewis and the piano with Andrew Le. David is an honors graduate of Interlochen Arts Academy as well as an alumnus of Interlochen Arts Camp, where he studied with Thomas Bara. He has won first prize and Audience Prize in the L. Cameron Johnson Organ Competition and first prize in the Annamae Rotman Organ Competition. He has held posts at the Latvian Lutheran Church and Trinity United Methodist Church in Grand Rapids, Michigan, where he also served as Organ and Choral Scholar for the Grand Rapids Choir of Men and Boys. David was the John L. Edwards Organ Scholar at St John’s Episcopal Church in Detroit and a Teaching Assistant in the Hope College Music Department. He recently completed graduate studies at the University of Cambridge and was Graduate Organ Scholar at Selwyn College under the direction of Sarah MacDonald. During his time in Cambridge, David studied the organ with Margaret Phillips (of the Royal College of Music) and was also organist for St. John’s Voices, a mixed-voice choir at St. John’s College directed by Graham Walker. David also recently obtained the Associateship diploma from the Royal College of Organists.

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Daniel Russell, Verger

Daniel came to Saint Mark's in the summer of 2017, having completed a Master of Sacred Music degree in choral conducting from Boston University, School of Theology in Boston, MA.  He additionally holds a Bachelor of Music in Sacred Music from East Carolina University, Greenville, NC and a Master of Music in organ performance from University of Houston, Houston, TX.  His background in sacred music, theology, and liturgy serves as a solid foundation for him to explore a broader ministry in his role as Verger at Saint Mark's.  He is responsible for organizing a great many aspects of the parish life of Saint Mark's.  Primarily, he works with the clergy staff to plan liturgies and coordinates the many volunteers who serve at them.  Additionally, he manages communications for parish and is building manager and liaison for the care of the buildings & grounds.  Daniel continues to ensure a southern accent is heard around the parish.

Clara Gerdes, Organ Scholar

Originally from Davidson, N.C., Clara Gerdes is a junior at the Curtis Institute of Music where she studies organ with Alan Morrison and harpsichord with Leon Schelhase. She was the winner of the 2014 Albert Schweitzer organ competition and a recipient of the Pogorzelski-Yankee scholarship sponsored by the American Guild of Organists. She is a frequent collaborator and chamber musician, performing with the Curtis Symphony Orchestra and the Curtis Opera Orchestra during the 2014-2015 school year, and was recently one of two organ scholars for the Charlotte, N.C. Royal School of Church Music summer training course.

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Madeleine Harris, Servant Year Ministry Resident

Madeleine Harris, originally from North Carolina, graduated from Eastern University in 2017 with a BA in Philosophy. After graduating she spent a summer living in community with the Sisters of the Love of the God, an order of Anglican women religious in Oxford, England. While there, she found great freedom and opportunity in the structure of the Daily Office, including the daily celebration of the Eucharist, which created a thirst in her to find a way to incorporate monastic values into ordinary life. During her time as a Ministry Resident at Saint Mark’s, she is thrilled to live as a member of a community dedicated to and resting upon prayer. She considers herself immensely blessed to have been a part of the shared life of Saint Mark’s for the last three years, and is excited for the opportunities of the year ahead. In her spare time Madeleine enjoys shredding on the ukulele and reading medieval women mystics. 

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Roses Laughlin, Servant Year Ministry Resident

Roses Laughlin has joined Saint Mark’s as the Ministry Resident for Outreach for the remainder of the year. A native of the Philadelphia area, she returns after spending three years studying at the University of Pittsburgh. After graduating last spring with a degree in Linguistics, Roses walked the Camino de Santiago across Northern Spain with a group of young adults. Her academic interests outside of Linguistics lie mainly in studies of Theology, Spirituality, and Literature. Her love of language plays an integral role in her love of liturgy, and vice versa, and she is thankful for the opportunity to live in a setting fully immersed in daily prayer and the celebration of Eucharist. She believes these things to be transformative and good for the world in which we live. During her time as a Ministry Resident at Saint Marks, she looks forward to engaging more intimately with the community, deepening her practice of prayer, and experiencing a life of daily service alongside her fellow staff members.


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Gabi Machado, Servant Year Ministry Resident

Gabi was born and raised in London, U.K. to Brazilian parents. She studied Theology and Biblical Studies at the University of St Andrews, Scotland. Her final year thesis was on mystical spiritual teachings, through the focus of the classical Catholic contemplative tradition of Saint John of the Cross, Thomas Merton and in first personal testimonials from a group of Carmelite Sisters in Scotland. She then went on to complete her Postgraduate Diploma in Education, specializing in Religious, Moral and Philosophical Studies. Last year, she served with Newark Acts as a kitchen manager/chef at the Hoboken Shelter. She never thought she could say with confidence that she can cook a nutritious meal for over 100 grown adults in under 2 hours… Besides cooking, you will most likely find Gabi drinking tea and reading, taking photographs, singing, playing her guitar and enjoying the outdoors.

 Mary Campbell, Financial Secretary

Mary Campbell, Financial Secretary

 Ron Hayes, Weekday Sexton

Ron Hayes, Weekday Sexton

 Jason De La Roi, Weekend Sexton

Jason De La Roi, Weekend Sexton