An Australian-owned security firm operating in Afghanistan has been accused by a US Senate committee of theft and corruption.

Compass Integrated Security Solutions is owned by Peter McCosker, the son of former Australian cricket player Rick McCosker.

Compass provided convoy guards for a food and fuel supplier in Afghanistan.

The Armed Services Committee report last month alleged the company hired untrained guards and paid an Afghan major-general to recruit guards from the army.

The report also detailed claims that Compass employees had sold ammunition for their own profit.

It was also alleged Compass failed to discipline employees who committed robberies and threatened to attack a company camp.