Julie Gai Wiseman (' Kaatz; died 30 November 2018) was an Australian cricketer. She represented her home state Queensland in three first-class matches and 23 List A matches during the 1990s.
Raised in Ipswich, Queensland, Kaatz joined the Queensland Police Service in 1994, eventually becoming a senior constable. She was married to Rod Wiseman. She died of cancer in 2018.