TAFE
The Employment and Training Division of the Department of Employment, Education and Training is the Northern Territory Government's lead agency for employment and training. At this site you will find a list of registered training organisations in the Northern Territory.
http://www.nt.gov.au/nteta

Other resources
The Department of Business Industry and Resource Development has a calendar of training located at
http://www.tbc.nt.gov.au

If you can't find what you're looking for here, you might like to explore some of the Australia-wide training directories which may cover courses offered in your location.