Smooth harmonies. Joyful performances. Infectious energy. Get ready for next-level a cappella with Countermeasure!

Since forming in 2010, Countermeasure has earned standing ovations and critical acclaim worldwide. Led by award-winning composer/arranger Aaron Jensen, the group has shared stages with a cappella giants including Naturally 7 and The Swingle Singers and top 40 stars like Corey Hart and Blue Rodeo.

Countermeasure features 13 of Canada’s top vocal talents, performing innovative arrangements of pop favourites, classic jazz standards, and original songs. Their diverse songbook has equipped the group to headline international choral concerts, play the main stage at jazz festivals, entice club-goers onto the dance floor. Incorporating innovative live looping, instrument imitation, and vocal percussion, Countermeasure enthralls their audiences worldwide with their dramatically choreographed shows and flawless harmonies. They have won multiple awards from Contemporary A Cappella Society of America, include Best CAL Album, best video, and for songwriting.

"Insanely talented, awesome and dynamic, infectious!" says Skylar Astin, star of The Pitch Perfect movies. 5 star reviews from, East Coast 107.6 FM Scotland, Blue Frog Studios in BC, Florian Statdler from VocalBlog in Germany and more!

When they’re not jumping onto countertops for flashmobs, or providing the live soundtrack to Canadian National Film Board shorts, Countermeasure can be seen at high-profile jazz festivals, concert series, and galas, as well as on CBC Radio and TV, Global Television, Rogers Television, City TV, and CP24. They are a founding artist of SING! The Toronto Vocal Arts Festival, Canada’s premier a cappella festival. They have wowed audiences on two U.S. and several Canadian tours, and in the UK at London a Cappella Festival, Edinburgh Festival Fringe, London-area theatres, and more. They performed the opening concert at the world-renowned Vocalmente Festival in Italy. The videos for their original songs, “Life is Fine” and “Fox in the Field”, from their latest album release, “Made to Measure”, have nearly 500,000 YouTube views.

Countermeasure is:

  • Aaron Jensen (Artistic Director, Arranger, and Composer)
  • Gianna Antonacci
  • Daniel Boyle
  • Nina Brown
  • Elora Burns
  • Icarus Devdas
  • J-M Erlendson
  • Marla Kishimoto
  • Qwyn MacLachlan
  • Tara Park
  • Hayley Preziosi
  • Elana Steingart
  • Jeremy Voltz

With sound by:

  • Chris Poole