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Meet our Vocal Coaches


Kathleen Hacker

Kathleen Hacker, soprano, made her New York debut as soloist with the American Symphony Orchestra at Alice Tully Hall and has sung with major symphony orchestras across the country, including those of Baltimore, Detroit, Pittsburgh, Kansas City, Cincinnati and Indianapolis. She has been a regular cover for Sandi Patty in the Indianapolis Symphony Yuletide Celebration and was a featured artist on the original ISO Yuletide Celebration CD. She can also be heard as soprano soloist on the Indianapolis Symphonic Choir 75th anniversary release of Mendelssohn’s Elijah. As a chamber musician, where she is most at home, highlights include appearances at the Marlboro, Bard and Aspen Music Festivals. Kathleen holds degrees from the Eastman School of Music where she studied with Jan DeGaetani and received the coveted Performers Certificate in both Opera and Voice Performance, and earned her doctorate of music from Indiana University. Kathleen is a Professor of Music at the University of Indianapolis where she teaches all things vocal, leads professional development and creativity classes, and serves as Artistic Director of the Opera Theatre. She is an avid supporter and has served as mentor for the Songbook Acdemy its inception.


Elaine Moebius

Elaine Moebius earned her degree in music education from Capital University.  After a thirty-six year career teaching vocal music in the schools in Columbus and Delaware, Ohio and Mooresville, Indiana, Mrs. Moebius is currently a private voice instructor and vocal clinician in the central Indiana area.  She has been a choral and show choir adjudicator in Wisconsin, Illinois, Ohio, West Virginia, Kentucky, and throughout Indiana. Mrs. Moebius is currently a site coordinator for ISSMA sanctioned show choir events, where she coordinates judges and supervises the adjudication process.

For ten years, Elaine has been a mentor, arranger and music director for the Great American Songbook Foundation’s Songbook Academy, an eight-day summer intensive where High School students from around the country study and perform songs from the Golden Era of American popular music.

Elaine enjoys golfing and spending time with her husband, Gordon, three daughters and nine grandchildren.


Mary Michael Patterson

Mary Michael Patterson is an Atlanta based performer, director/choreographer and educator who has been seen on Broadway in The Phantom of the Opera (Christine Daaé), Anything Goes (Hope) and the First National Tour of Love Never Dies (Meg Giry). She has been featured in concert work at Lincoln Center and as a lead vocalist with the American Pops Orchestra. An accomplished director on stages from The Green Room 42 to Arena Stage, she also served as Assistant to the Supervisor on Broadway (The Phantom of the Opera).


Lynne Rothrock

A graduate of Luther College (B.A. Music/Theatre) and Western Michigan University (M.M. Vocal Performance) Lynne Rothrock is a vocalist/entertainer and arts educator. She has performed as a solo artist at a variety of venues around the United States, including Birdland (NYC), The Bluebird Café (Nashville), Davenports Cabaret
(Chicago), Hell’s Kitchen, Aster Cafe (Minneapolis), Crown & Anchor (Cape Cod, MA). She has also worked for a variety of theatre companies around the country as actress and/or musical director. Lynne was one of 30 vocalists selected to attend the prestigious International Cabaret Conference at Yale University.

An active arts educator, she has served on the voice faculty of Western Michigan University, Roosevelt University’s Chicago College of the Performing Arts, St. Ambrose University and currently serves as Instructor of Musical Theatre at Luther College. Lynne has served as clinician at the Manhattan Vocal Jazz Festival at Lincoln Center, Brightleaf Music Workshop and has adjudicated for Heritage Music Festivals for 25 years – coaching choral ensembles in every major US city. Lynne has led song performance masterclasses for arts organizations, universities and the Kennedy Center American College Theatre Festival Conference. Follow for information about upcoming events.


Catherine Walker

Catherine Walker holds a master’s degree in Choral Conducting from Western Michigan University and has worked extensively as a musical director, most recently on productions of Next to NormalThe Great American Trailer Park MusicalParadeBlood BrothersUrinetownThe Light in the Piazza and Shenandoah, starring Robert Newman of TV’s Guiding Light. Her work as a choral conductor has been recognized by the Michigan School Vocal Music Association and the American Choral Directors Association. Catherine is an associate professor of music in the Department of Musical Theatre at the University of Michigan.