She explores a Cree worldview or nêhiyawin through body, mind, emotions, and spirit; examining what it means to live in contemporary space and time.

L'Hirondelle's father emigrated from Germany as a young man shortly after WWII, and initially worked as an inventor for CIL and then later, in the oil industry moving the family around the western provinces to be near many of his gas plant startups.

[citation needed] She attended the Royal Conservatory of Music in Toronto, Ontario in 1990 and also studied voice, theory and composition privately for several years previous to that.

[5][4] L'Hirondelle was also part of the group M'Girl (pronounced ma-girl), an Aboriginal Women's Ensemble with Renae Morriseau, Sheila Maracle and Tiare Laporte.

[22] With the support of a Toronto Arts Council grant, L'Hirondelle composed four round dance songs from an urban Aboriginal perspective.

[23][4] L'Hirondelle received another Toronto Arts Council grant in 2015, this time to return to the idea of composing using traditional song forms for Indigenous language retention.

[26] In 2014, L'Hirondelle was one of five Indigenous artists selected by the Assembly of First Nations to design commemorative markers to be placed on all 139 sites of former residential schools.

Through current-day cities, she traces Indigenous trails, walking along traditional hunting paths, visiting ceremonial locations, and singing and recording.

[33] Her five-song Giveaway EP, produced by Gregory Hoskins, incorporates samples from the 2008 Vancouver version of her sonic mapping songwriting project.

In 2009, L'Hirondelle's "nikamon ohci askiy" (Vancouver songlines) project was recognized as an Honoree in the Net.Art category from the Webby Awards.

[6] In the mid-1980s, she worked as a program coordinator for the artist-run centres Second Story and Truck in Calgary, and has subsequently been involved in a number of arts consulting projects.

[38] In 2008, curator Richard William Hill featured L'Hirondelle's work in the exhibition The World Upside Down, held at the Walter Phillips Gallery and three other art museums.