[1] Her production and writing credits include the film Subjects of Desire, Love, Sex and Eating the Bones and the television series Guns, She's the Mayor[1] and Shoot the Messenger.

The aim of her work has been a steady understanding of the stories that most people do not want to direct; touching subjects about gun violence, homophobia and deportation of immigrants in the city of Toronto.

Following the success from Love, Sex And Eating the Bones, Holness produced and co-wrote a miniseries for CBC titled Guns (2009).

She then went on to produce a documentary, Badge of Pride (2010), which looked at the struggles that gay police officers faced in the force.

Holness mentions that she obtained the inspiration for this film from a classmate in high school who was deported back to Jamaica- and killed in a shooting.