Theo is the son of Christine Nabobbob and James Gulamuwu.
He was born in Gunbalanya and went to secondary school at Kormilda College in Darwin.
Theo has worked as a tour guide for Jawoyn in the Katherine region as well as for various other organisations around the top end and interstate. He holds a certificate in Tourism (Australian Indigenous Culture).
Theo works as a screen printer, Injalak Hill Tour Guide as well as painting.