He completed a Bachelor of Arts majoring in film production at the Queensland University of Technology.
In the same year, he co-created and wrote the web series Ultimate Fanj (Working Group/ABC Television Australia) about the lives of hapless hipsters in inner-city Sydney.
His credits also include a number of Australian drama series, including the romantic comedy The Wrong Girl (Playmaker Media) based on the novel by Zoe Foster Blake, the dramedy House Husbands (Playmaker Media) and the television adaptation of John Marsden's action-adventure novels Tomorrow, When the War Began (Ambience Entertainment).
He has been nominated for two Australian Writers' Guild awards for his work on young-adult drama series Ready for This and Dance Academy.
Other writing credits include: In June 2014, Mapleston married actress Georgina Haig.