Nancy Telfer is a Canadian composer who has been a choral clinician and guest conductor for many provincial, national, and state organizations throughout Canada and the United States. For many years she has presented workshops on vocal production to both choral conductors and singers.

Since 1979 Telfer has composed over 300 works for choirs, soloists, chamber ensembles, orchestras, bands, and pianists; many of which are published in Canada and the United States. Her music ranges from beginning to virtuoso levels and she has been commissioned to compose music for many fine performers. She believes that all music should delight the ears, capture the imagination of the mind, and feed the soul. Successful Sight-Singing, Books 1 & 2 and Successful Warmups, Books 1 & 2 (published by the Neil A. Kjos Music Company), her reputable method books for singers, choirs, and vocal classes, provide innovative systematic teaching materials for sight-singing and every aspect of good vocal production. Her more recent publications, Singing In Tune and Singing High Pitches with Ease, focus on strategies and solutions for conductors, conductors-in-training, and voice teachers. Nancy Telfer's newest book, Successful Performing, focuses on ideas to ensure an outstanding choral performance.