[5] Amrin was a solicitor at Watson, Farley & Williams Asia Practice LLP, and was also a member of National Council on Problem Gambling as well as the governing board of Nanyang Polytechnic.
[7][8][9][10] After his electoral defeat in Sengkang GRC during the 2020 general election, Amrin moved to the technology sector, and took up roles at two local firms in September 2020.
[12] He made his political debut in the 2015 general election as part of a four-member PAP team contesting in Sembawang GRC and won.
[15] During the 2020 general election, Amrin contested in the newly created Sengkang GRC as part of a four-member PAP team and lost.
[16] He became the third PAP MP to lose re-election after a single term in Parliament, joining Ng Pock Too and Seet Ai Mee.