Wiseman was born in Auckland, New Zealand. She is the youngest of three children and grew up practising dance and snow skiing. She attended the classic course at Outward Bound NZ three times and is now an Ambassador for Outward Bound NZ.
Wiseman completed a Bachelor of Performing & Screen Arts at UNITEC in Auckland and has worked on both stage and screen. Wiseman has also worked as a presenter and voiceover artist. Wiseman works both in NZ and Australia. Her movie and television roles include leads, supporting and guest appearances. Wiseman has been nominated for film and television awards multiple times and in 2011 she won Best Supporting Actress in a Feature Film at the Aotearoa Film and Television awards for her role in Matariki. That year she was also a finalist for Best Lead Actress in a Feature Film for her role in The Insatiable Moon. She won Best Actress for playing Kate Sheppard in What Really Happened: The Women's Vote at the NZ Television Awards in 2012. Wiseman co-founded and is a board member and tutor at NZ acting school; The Actors Program. In 2013 Wiseman joined the cast of Australian Period drama A Place To Call Home in the recurring role of Carolyn Bligh before being upped to regular cast for the second season.