Australian Sevens captain Richard Graham will sign for Bath after the Games.
Graham will join as skills and defence coach, completing an all-Wallaby backroom staff with first team coach Brian Smith and team director Michael Foley.
But Graham's arrival is expected to herald the departure of ex-coach John Hall, who had been an assistant under Foley and predecessor Jon Callard.
Previous defence guru, Ellery Hanley, has also left.
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