Mrs. McNiff has led choirs and instructed courses at both the University of Arizona and Arizona State University. She challenges her groups to think in terms of vocal health and positive expression. Her focus on engaging and yet demanding material inspires her to regularly integrate a wide variety of foreign languages, complex and lively rhythms, and to demonstrate  historically inspired performance practices. 

In addition, Mrs McNiff has conducted fully orchestrated works by Bach, Handel, Mozart and modern composer such as Joseph Martin and Pepper Choplin. She has conducted chamber works and 21st century opera by Eva Kendrick and Ronnie Reslef and has composed several treble works for her own choral ensembles. In addition, she specializes in Renaissance and Baroque practices as well as a passion for an authentic and wholly respectful approach to the music of underrepresented minorities. 

She has directed the Arizona State University Gospel Choir, University of Arizona Opera Chorus, Recital Choir, Honor Choir, Kantorei Singers and University Singers. She has also led the Leman Academy Honors Choirs, Audivi Vocem Conductors Choir Summer Festival ensembles, Tucson Masterworks Chorale, Bisbee Community Chorus, Christ Presbyterian of Tucson Choirs, Mountain Vista Unitarian Universalist Choirs, Church of the Painted Hills of Tucson United Church of Christ Choirs, and has appeared as a regular Guest Conductor for the First Southern Baptist Church of Tucson and Christ the King Catholic Church of Tucson. 

To meet the need of undergraduate students, Mrs. McNiff designed the Audivi Vocem Conductors Choir Summer Festival in 2015. The program includes ensembles in Tempe serving Arizona State Universty and Northern Arizona University, and in Tucson serving the University of Arizona. She oversaw masterclasses with young conductors, acted as primary organizer, recruited multiple choral and orchestral ensembles. She created and directed a renowned program which attracted guest clinicians such as Grammy Award Winning Dr. Jerry Blackstone (University of Michigan), Grammy Award Nominated Dr. James Jordan (Westminster Choir College), Grammy Award Winning Dr. Jason Harris (Xavier University), and Dr. Arian Khaefi (San Diego State University).

 Mrs. McNiff, leading the University of Arizona Recital Choir, 2015