She was granted the Francis Robinson Award for performance and academic achievement at Westminster and performed actively as a soprano soloist including singing operatic roles at the Spoleto Festival, Aspen Music Festival and the Bowdoin Festival. She was given the National American Teachers of Singing scholarship for advanced study in voice for recognition of her performances that were a part of the program at the Aspen Music Festival. While in Aspen, she was a concerto competition winner and performed as a soloist with the Aspen Music Festival. While in Princeton, she taught as the vocal coach for the American Boychoir School and developed a training program for young singers at the Westminster Conservatory of Music.
Most Recently, Lehmann was the Director of Choral Activities at Pacific Lutheran University. She came to Washington following eleven years in Oregon, where she was the Director of Vocal and Choral Activities at Oregon State University and conducted the OSU Chamber Choir, Madrigal Singers, and the Opera Workshop. The OSU choirs performed nationally and internationally under Lehmann's direction, and in 1996 she was given the Stewart Award for faculty development and excellence. She served as President of the Oregon Chapter of the American Choral Directors Association while at OSU. After her position at OSU, Lehmann was also an associate professor on the faculty of the University of Oregon for two years, where she directed the U of O Chamber Choir, taught music education classes and directed the Eugene Chamber Singers. She was a performer and lecturer for the Oregon Bach Festival while in Eugene, studying choral conducting with Helmuth Rilling. She was one of the first faculty appointed for the Oregon Bach Youth Academy Choir, teaching vocal technique and choral classes. She traveled to Stuttgart, Germany to continue her studies of the Choral music of Bach at the Internationae Bach Acadamie.
Kathryn Lehmann has taught public school vocal music at the elementary and secondary levels in the Clover Park and Puyallup School districts in Washington. As a public school educator, she directed performing groups at Music Educator conventions at the state and regional levels in the Pacific Northwest gaining a reputation for her expertise in developing the voice in a choral setting. She holds membership in several professional societies including serving on the Washington State board for the American Choral Directors Association. She has studied choral conducting during her doctoral studies at the University of Colorado in Boulder with Joan Catoni Conlon and Lawrence Kaptein. She has studied voice with Judith Nicosia and Ellen Faull, and conducting with Joseph Flummerfelt, Maurice Skones and Helmuth Rilling. Her experience in the public schools and at the American Boychoir School has given her concentrated experience in training young voices and identifying the problems of the changing voice. She has substantial choral directing experience with singers of all ages, from elementary to adult, in both secular and sacred settings. She is in demand as a clinician through the Pacific Northwest and the West Coast.