The South African replaces New Zealander Andrew Rouvi, who led Amblers as they endured a rough return to the top flight of UAE domestic club rugby last season. Amblers won just one of their 18 games all season.
Van Blerk, 51, coached the club in 2012/13 when Amblers first reached the UAE Conference final, but were defeated.
Van Blerk, who played for the Lions and Blue Bulls in his homeland, also made it to the final trials for the South Africa A side in 1985 before a sporting boycott due to Apartheid robbed him of a chance to pull on the Springbok shirt.
His appointment at Amblers is part of a new coaching structure being adopted by the club, with a more unified approach across all teams.
Despite their woes last season, chairman Sean Emmett saw a steady improvement during Rouvi’s reign and insists that Amblers will prove to be a different beast next season.
“We gained a lot of experience in our one season in the Premiership and we think we’ll be able to improve and hopefully string some wins together, and get a bit closer to the other teams,” said the Australian.
Amblers finished bottom of the Premiership but remain in the UAE top flight as Conference champions Sharjah Wanderers have elected to decline promotion.