Roseanne trained at the Samuel Beckett Centre, Dublin, and Drama Centre London. She recently took part in the Gap Day programme, run by Lian Bell and Mermaid Arts Centre. In late 2020, she received a Project Award from the Arts Council to develop a new play about motherhood and climate change. In 2017, Roseanne was awarded an Emerging Artist Bursary by Dun Laoghaire-Rathdown Arts Office, which she used to research and develop Zandra, Queen of Jazz, a play based on the extraordinary true story of Ireland's first female saxophonist. The play premiered in 2019 to great critical acclaim.
Some highlights of her performance work include: Pop Up Picnic - a multi-sensory, immersive experience for children with complex needs (Helium Arts); a tour of the Outer Hebrides with the Whisky Galore (National Theatre of Scotland); and an immersive production of Macbeth, in which the audience stayed the night in a tower block in East London (RIFT). She has originated roles in many new plays, including The Plot by Paula Lonergan, Sisters of the Rising by Christiane O'Mahony, Overshadowed by Eva O'Connor, and Recording Hedda by Terje Tveit.
Roseanne teaches at the Gaiety School of Acting and on Creative Ireland's Teacher-Artist Partnership Programme.