Two construction companies from Australia and Japan face criminal charges over the death of worker Carl Delaney at the large INPEX gas project in late 2017.
Whittens Group employee and Darwin man Mr Delaney, aged 56, was conducting insulation repair works on LNG tanks when he fell and was engulfed by the powdery insulation material perlite, and suffocated.
The works being performed were high risk, in a confined space, with workers exposed to the risk of falling from height and engulfment into the insulation product below, NT WorkSafe said in a statement announcing they were laying charges.
Mr Delaney was supposed to have a colleague with him but was operating alone and although he was wearing a harness it was not secured while he was working on the evening of November 29, 2017.
NT WorkSafe will allege that Kawasaki Heavy Industries Ltd and Whittens Group Pty Ltd failed in their health and safety duty under section 19 of the Work Health and Safety Act.
The charge carries a maximum penalty of $1.5 million.
The matter is listed in the Darwin Local Court on January 14 next year.