Ed Morrison will referee his last major match at Twickenham when he takes charge of the Tetley's Bitter Cup final.
He will run out before the teams - Harlequins and Newcastle - to mark the occasion.
Morrison, who is retiring from the International Rugby Board's international panel at the end of this season, officiated in his first Test match 10 years ago.
He has controlled 33 major internationals, including the 1995 World Cup final when South Africa famously beat New Zealand after extra time in Johannesburg.
On the domestic front, Saturday's game will be his fourth English cup final, in addition to two Varsity matches and numerous club games over a 16-year period.
He became one of the Rugby Football Union's first full-time referees in 1998, and last year was awarded an honorary degree by Bristol University for services to rugby union.