Music staff

Music Staff

Timothy J. Krueger | Choirmaster

Timothy J. KruegerTimothy J. Krueger, Choirmaster at St. Andrew's, studied musicology at the University of Colorado, Boulder; the University of Hamburg, Germany; and the University of London's Royal Holloway College. He is the founder and artistic director of St. Martin's Chamber Choir, Colorado's first professional choir, with whom he has recorded twelve critically acclaimed CDs; and is on the musicology faculty at Metropolitan State University of Denver.  Formerly he was chorus master of the Boulder Bach Festival, the Colorado Music Festival, and has worked professionally with such ensembles as the Santa Fe Desert Chorale, Chicago a cappella, Vox Early Music Ensemble (Ann Arbor), Episcopal cathedral choirs such as St. John's in Denver and St. Paul's in Detroit, the Santa Fe Opera, and the Ars Nova Singers of Boulder.

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Ralph B. Valentine | Organist

Ralph Valentine | OrganistRalph B. Valentine, Organist at St. Andrew's, holds a Bachelor of Arts degree from Harvard University and a Master of Sacred Music degree from Union Theological Seminary in New York City. He began his teaching career at Rosemary Hall School in Greenwich, Connecticut, and moved with the school to Wallingford, Connecticut, when it merged with The Choate School in 1971. At Choate Rosemary Hall he was Head of Music, Choral Director, School Organist, and Instructor in Theory, Harmony, Counterpoint, History, Composition, Organ, and Harpsichord for forty-two years. A past Dean of the New Haven Chapter of the American Guild of Organists, Mr. Valentine also served as Organist and Choirmaster at St. Andrew's Church in Stamford, St. Andrew's Church in Meriden, and for thirty-four years as the Organist and Choirmaster at St. John’s Episcopal Church in West Hartford, Connecticut. He has been active as a recitalist, consultant, workshop leader, accompanist, and composer.

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Staff Singers

St. Andrew's morning services employ a core octet of staff singers along with a choir of auditioned singers.

Ashley Hoffman | Decani Soprano

AshleyHoffmanAshley Hoffman sings locally with St. Martin's Chamber Choir and Colorado Bach Ensemble, and has also appeared with Ars Nova Singers and as a soloist with Colorado Chorale. Before moving to Denver, Ashley performed professionally in the Los Angeles area with De Angelis Vocal Ensemble, LASchola and Jouyssance Early Music Ensemble. During her five years as staff soprano at All Saints' Beverly Hills, she was featured in several recordings and premiere performances. She was also a regular guest at St. James' in the City. Her recording credits include CDs, soundtracks and video games. During the day she works as a graphic artist (on such projects as the St. Andrew's website) and spends time with her husband Barry, three-year-old daughter Lyra, and black lab Beverly.

Laura Tribby | Deputy Soprano

LauraLaura hails from Kalamazoo, Michigan, where she earned degrees in trumpet and voice performance at Western Michigan University and lived in her father's violin shop. She moved to Colorado in September 2014 after many years of daydreaming about the Rocky Mountains and the sunny bluebird sky that makes the Denver area so special. Thrilled with the active choral scene, Laura has performed with the St. Martin's Chamber Choir, Colorado Bach Ensemble, Colorado Opera Chorus, Colorado Symphony Chorus, Denver Pro Chorale, Canto Deo, Wellshire Presbyterian Sanctuary Choir and Celebration Singers, Denver Jingle Singers, Vittoria Ensemble, and the newly formed Anima Chamber Ensemble. She is also a Colorado Honor Band instructor and enjoys teaching younger students. Along with her deep passion of music (which includes an extremely vast array of genres), Laura loves riding her bike, hiking, taking pictures, yoga, and feeling grateful - especially for colors, tomatoes, and friends.

Micaëla Larsen Brown | Decani Alto

MicaelaLarsenBrown_webMicaëla Larsen Brown was born in Denver and grew up singing…in India and then Denver and Brighton, Colorado. She graduated from Univ. of Sioux Falls with degrees in Music and Speech & Theater, and then lived in Normandy, France for two years. She subsequently sang several concerts in France. Micaela is starting her 11th year with St. Martin’s Chamber Choir, she has sung with the Colorado Chorale, and served as staff singer at Central Presbyterian Church for 15 years, and a staff singer at St. John's Cathedral for 4 years. She is currently a staff singer at St. Andrew's Episcopal Church. Micaëla was an elementary music teacher for 25 years. She retired from full-time teaching to pursue several mini-careers:  teaching voice lessons, designing & sewing drag apparel, singing, substitute teaching, and marketing her invention (a hat that can be worn with a bike helmet) and her CDs of Silly Songs for Kids. Micaëla also volunteers as a music therapist, singing for nursing home and hospice patients and singing for kids at Children's Hospital Colorado. Micaëla has received the Rotary Teacher of the Year award and Outstanding Alumni Award from Univ. of Sioux Falls. Micaëla and her husband, Jack raise rescue critters.

Mark Wagstrom | Decani Bass

MarkWagstromA newcomer to the Denver music scene, Mark is in his second season with St. Andrew's. He is not a newcomer to professional singing however, having spent 18 years as a professional chorister in the New York City metro area. Among the ensembles with which Mark sang regularly are Voices of Ascension, directed by Dennis Keene; Musica Sacra, directed by Richard Westenburg; New York Virtuoso Singers, directed by Harold Rosenbaum; Sacred Music in a Sacred Space, directed by Kent Tritle, and the Gregg Smith Singers. Additionally, he has performed with such notable organizations as the New York Philharmonic, the Brooklyn Philharmonic, The American Symphony Orchestra, and the American Composer’s Orchestra and under the direction of Sir Roger Norrington, Sir Charles Mackerras, Robert Spano, Leon Botstein, and Michael Tilson Thomas to name just a few. In addition to singing with St. Andrew's, Mark is a member of St. Martin's Chamber Choir. When not singing, Mark works as a Service Technician repairing and servicing ATMs and other financial services equipment. He lives in Denver with his wife, Lorien, and more than one cat.

Cynthia Henning | Cantoris Soprano

CynthiaHenningCynthia Henning received her BM in Vocal Performance from the Lamont School of Music at the University of Denver, where she was a member of the Lamont Chorale and Chamber Singers, was cast in principal roles in operas and musicals, and regularly returns to sing with The Evans Alumni Choir. She has sung in the choruses of St. Martin's Chamber Choir, Colorado Bach Ensemble, Skinner Summer Choralfest, Baroque Chamber Orchestra of Colorado, Colorado Music Festival, and Central City Opera. She currently serves on the vestry at St. Andrew's, and has served a term as the singer representative to the St. Martin's Chamber Choir Board. Cindy is employed as a legal administrative assistant.

MB Krueger | Cantoris Alto

MBKruegerMB Krueger grew up in the upper peninsula of Michigan, where she took 14 years of piano lessons from her grandmother and sang in church and school choirs.  She was a National Merit Scholar at Michigan State University and earned her bachelor’s degree in music education, followed by a master’s degree from Miami University in Oxford, Ohio.  MB began her career teaching middle school and high school choirs, eventually moving on to collegiate teaching.  She is currently the Director of Choral Activities at Metropolitan State University of Denver, where she has taught for the past sixteen years, and where she directs two choirs, teaches conducting, and is involved in musical theatre productions.  MB has sung professionally with the Santa Fe Desert Chorale, Ars Nova Singers, the Baroque Chamber Orchestra of Colorado, the Santa Fe Opera, and has sung with St. Martin’s Chamber Choir since 1997.

Brock Erickson | Cantoris Tenor

DSC00400cBrock Erickson is excited to return to the St. Andrew’s choir after a hiatus of several years.  He first joined the choir in 1997 and was a staff tenor for some 16 years.  He previously held staff singer positions with several other fine church choirs in Denver.  Brock received his Bachelor of Music in Music Education from Kent State University, and studied music composition at the Lamont School of Music at the University of Denver.  He was a frequent performer with the early music ensemble Diverse Passions, and has appeared with the Colorado Music Festival, The Playground Ensemble, the Evans Choir, and the Denver Early Music Consort.  Brock has been a member of St. Martin's Chamber Choir since 1996, and served as the Executive Director of St. Martin’s from 2004 until 2010. He is currently a Product Support Analyst with Epicor Software Corporation.

John David Cleveland | Cantoris Bass

Son of a music professor and a pianist, John David Cleveland has been playing the violin since the age of three. John David traveled to Japan to study with Dr. Shinichi Suzuki. He performed at the Lincoln Center, Carnegie Hall, and more recently, the National Cathedral. John David has been singing professionally for years, including a season with St. Martin's Chamber Choir. He has also recorded a track on a children's CD called Multiplication Sensation.  John David is from Louisiana and attended University of Louisiana at Monroe studying Early Childhood Education and Psychology.  He spent his summers working at Colorado Mountain Ranch and moved to Colorado in 1994.  John David met his husband thirteen years ago in Denver, and they got married in Manhattan in March 2013.  For over two decades, he has taught at a Montessori School.  When not in the classroom, John David enjoys biking, skiing, hiking, snowshoeing, movies, live theatre, live music, and reading.

John Bosick | Deputy Bass

JohnBosickJohn was born in Big Spring, Texas, where his father was stationed as a pilot at Webb Air Force Base. After time in Arizona, New Mexico and Lakenheath, England, he spent the rest of his childhood in Black Forest, Colorado, after his father’s retirement from the Air Force.  John moved to Boston to receive his education in vocal performance at New England Conservatory and opera studies at the Longy School of Music in Cambridge, Massachusetts. A former member of the Opera Company of Boston, he has worked as music director, organist, and soloist for several churches and synagogues in Boston, New York City and Denver. He has performed in productions at Boulder's Dinner Theatre and has also played keyboards in their orchestra. Currently, John is interim music director and organist at Glory of God Lutheran Church in Wheat Ridge, CO, sings with St. Martin's Chamber Choir, and is principal accompanist for Harmony: a Colorado chorale.

Additional Singers

Many talented professionals join us regularly for additional services.



Abbi Chapman
Kathryn Radakovich
Katy Maguire Lushman
Laura Tribby (also as Alto)


Brock Erickson
Joseph Gaines
Taylor Martin
Ryan McNiff


David Farwig 


Lorena Perry
Alan Polacek
Karissa Swanson
Allison Westfahl
Rick Wheeler