Investigations are underway on Curtis Island after Bechtel discovered equipment that had been tampered with on the QCLNG site.
Gladstone Police were called to the site on Monday when Bechtel workers found a number of chain block lifting devices that appeared to be missing nuts.
Bechtel Gladstone general manager Kevin Berg said further inspections found the equipment had been ‘intentionally damaged’.
"A full inspection of the equipment across the site found further suspected tampering had occurred on the same equipment," Berg said.
Workplace Health and Safety and police inspected the site.
"Workplace Health and Safety are now conducting an investigation, and I'll wait till I see the findings of that before I decide whether it's a police matter," Detective Senior Sergeant Luke Peachey said.
Berg said it was ‘extremely distressing’ that someone may have intentionally put workers at risk.
"This act goes against our Bechtel Safety Absolutes and we will take immediate action to remove the person or persons responsible from our projects," Berg said.
"And if this is found to be the result of criminal or intentional actions, Bechtel will strongly support any action the regulators and the Queensland Police Service determine to be appropriate."
"Bechtel is working closely with both organisations to fully investigate these incidents on site."
The suspected sabotage was found during routine pre-use equipment inspections.
Currently Bechtel is constructing three major projects on Curtis Island including Australian Pacific LNG, Gladstone LNG and Queensland Curtis LNG.
QCLNG is the most advanced of the LNG projects on Curtis Island, with first gas expected in 2014.