Brett will now be at the Gnoll until at least the end of the 2004/2005 season.
Neath Director Mike Cuddy said: "Brett was keen to extended his contract for a further year.
"As a club we have to secure players of his quality on long-term contracts if we are going to build a team capable of performing in the European Cup, as well as performing in the Welsh Scottish league.
"Many sides in Wales and over the border have courted his services, and we are delighted that he is staying at the Gnoll as Brett is performing on top of his game and is clearly the best openside in Wales at the moment"
The Neath team to play Edinburgh at The Gnoll, on Saturday 27th April
2002, kick off at 2.00pm, will be as follows : -
Shaun Connor; Kevin James, James Storey
Dave Tiueti, Dean Dewdney; Lee Jarvis, Patrick Horgan; Nathan Bonner-Evans,
Brett Sinkinson, Alfie Mocelutu,
Gareth Llewellyn (c), Steve Martin,
Andrew Millward, Steve Jones, Duncan
Replacements: Gareth Morris, Barry Williams, Allan Bateman, Andrew Howell,
Paul James, Lyndon Bateman, Steve Tandy
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.