Less than a third of the migrants coming to Australia on skilled workers' visas are working in their field, a report by Monash University researchers has found.

Almost 213,000 people moved to Australia as skilled migrants between 2001 and 2006, and while the majority of those from English speaking countries went on to fill professional or managerial positions, just 29.3 per cent from non-English speaking countries did the same.

"They're not contributing to the skilled workforce but they're contributing to urban population growth and housing pressure," research author Bob Birrell told Fairfax.

Prof Birrell and co-author Ernest Healy have called for a freeze on skilled migration, while the government concentrates on using bridging courses to bring the migrants up to the standard required by their professions.

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