The Bearer of the Grand Sword's role is to look after the Gorsedd Sword during processions and during the Gorsedd ceremonies. He carries the Sword before the Archdruid in all Gorsedd processions, always by its blade, not by its hilt.

This was the first officer to be named from among the Gorseddogion, because in 1819 it was noted that Gwilym Morganwg (Thomas Williams) was the 'Sword Bearer' in the important provincial eisteddfod in Carmarthen.

Since then the office has been held by many prominent Welshmen.