An Australian military expert who worked for the Australian government and US Special Operations Command has been jailed for five years in the US for distributing child pornography.

Adam Cobb, 48, educated at Australian National University, University of Sydney and University of Cambridge, had built an impressive career and was working as a professor and director at the esteemed US Naval War College in Rhode Island when arrested in 2015.

Cobb admitted to meeting a 17-year-old British girl online, exchanging explicit images and having a sexual relationship with her that was recorded on video and also engaging in "sexual text messaging" with a 16-year-old Maryland girl.

AAP

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