[5] Westerman wrote her first play in 2015, the feminist comedy-drama Tortoise, about three women living on a locked NHS psychiatric hospital ward.
The play was adapted from Westerman's MSc dissertation on the gendering of mental illness and systemic misogyny within the psychiatric industry.
[11] In 2022, she won a Royal Society of Literature Award, and was subsequently nominated for Fellowship by current RSL Fellow James Graham.
[12] In 2023, publisher 404 Ink announced that they had signed Westerman to a publication deal to write her first non-fiction book, a collection of personal and anthropological essays exploring death, grief and bereavement.
Westerman is a longtime member of Disabled People Against Cuts, and has marched and spoken at DPAC protests.