[5] Sedgwick's first TV commissions were in 1990, being RTÉ's Fair City, and Scratch Saturday, and started working full-time as a screenwriter in 1998.
[9] Her play, Trade Me a Dream, which, according to the Evening Herald, dealt "with conflict caused by the Troubles in Ireland," opened as a production in August 1997.
[citation needed] Sedgwick is serving as the Screenwriter-in-Residence at Maynooth University and Kildare Co. Council Library and Arts Service.
In 2016/17, she obtained a Master of Arts (MA) degree in Screenwriting for Film & TV from Leeds Metropolitan University, which she completed in 1999.
[3][8][13] Sedgwick was the creator of Punky, the RTÉ children's animation series, and the first of such in the world in which a character with Down syndrome was the main subject.