Colonel Charles Barnett, from the Services Prosecuting Authority, said outside the court:
Sgt Nightingale has now had the trial which he requested, which is his right to seek. He has now been convicted by the board.
His fine record as a soldier is a matter that will no doubt be considered carefully when the board considers his sentence.
More top news
A grandmother says she was outraged after her grandson was segregated from his classmates by a cardboard screen - for being one minute late.
Leaked documents have revealed the first known picture of Mohammed Emwazi - named as IS militant Jihadi John - as a student in London.
With March just around the corner it's looking like this winter will be the sunniest on record (data goes back to 1929).