Nemeth has written scripts for many broadcast animation series, including: KuuKuu Harajuku, Hairy Legs, Bananas in Pyjamas, Hoopla, Jar Dwellers, Shezow!, Sea Princesses, Bottle Top Bill, Tracey McBean, Li’l Elvis Jones and the Truckstoppers, Skippy the Bush Kangaroo, Crocadoo 2, Wicked and Gloria’s House. His live action series for children include: Scooter:Secret Agent, Pig's Breakfast, Chuck Finn and Crash Zone. He wrote for Newlyweds, Acropolis Now, The Comedy Company, Col'n Carpenter and Larger than Life.
Nemeth has had ten radio plays produced and broadcast in four countries. He has also written award winning full length and one-act stage plays which have been produced and published. Nemeth has also written audiovisual shows for the Melbourne Planetarium: Tycho to the Moon and Spinning Out. Spinning Out was also produced for the Perth and Brisbane Planetariums. Tycho to the Moon was produced for other planetariums in Australia, the United States and South Africa.
Kevin's Bottle Top Bill picture books Moon Mayhem, The Junkosaur, The Great Wild Woolly, and Naughty Ned were published by Pan Macmillan Australia.