[4] After reviving his career with Pahang FA and helped them to lift the long sought trophy, he decided to not extend the contract with them for the upcoming season as he joined Johor Darul Takzim FC later for the new challenge down south.

Amirul made his senior debut against Bahrain in 2010 FIFA World Cup qualifier.

[5] However, Chelsea coach Luiz Felipe Scolari praised the Malaysia XI for giving a good fight against his team.

Amirul scored his first international senior goal against Myanmar in 2008 Merdeka Tournament.

In November 2010, Amirul was called up to the Malaysia national squad by coach K. Rajagopal for the 2010 AFF Suzuki Cup.