The club has welcomed the pacer.
"The pace bowler will feature for Essex for the remainder of the season and was warmly welcomed to the Club by the Chelmsford crowd during the Tea interval on Day One against Warwickshire," the country said in a statement.
Mohammad Amir will feature in the NatWest T20 Blast.
Pakistan beat India by 180 runs to clinch the trophy.
The young pacer played a crucial role in Pakistan's trophy victory in Sunday's clash.
Image: Official Facebook page of Mohammed Amir
Support Our Journalism
We cannot do without you.. your contribution supports unbiased journalism
IBNS is not driven by any ism- not wokeism, not racism, not skewed secularism, not hyper right-wing or left liberal ideals, nor by any hardline religious beliefs or hyper nationalism. We want to serve you good old objective news, as they are. We do not judge or preach. We let people decide for themselves. We only try to present factual and well-sourced news.