Hidzir joined Amin-Tan & Co. in 2018 as a member of the Conveyancing Department. He obtained his LL.B (Hons) from University Malaya in 1977. In 1982, Hidzir was admitted as an Advocate and Solicitor of the High Court of Malaya. Hidzir also successfully completed his Diploma in Shariah Law and Practices from International Islamic University Malaysia in 1990. His area of expertise includes Islamic banking, banking regulation, and anti-money laundering laws.

Hidzir was formerly a senior officer of Bank Negara Malaysia, and he served the bank for 35 years. Throughout his tenure with Bank Negara Malaysia, he served in various departments namely Bank Examination Department and Bank Regulation Department. He was involved in enforcing the provision of the Banking and Financial Institution Act 1989 and other related banking laws under the purview of Bank Negara Malaysia.

During the Malaysian economic crisis in the year 1998-2002, Hidzir served as the Head of Secretariat for Corporate Debt Restructuring Committee (CDRC). CDRC is one of the agencies (beside Danaharta and Danamodal) set up by the Government to revive the Malaysian economy during the economic crisis.

Hidzir also served as Chief Executive Officer of ERF Sdn. Bhd. (Tabung Pemulihan Usahawan). From 2002  to 2012, he served as a Managing Director/Chief Executive Officer of (TPPT) Tabung Pemulihan Perumahan Terbengkalai Sdn. Bhd. a company set up by Bank Negara Malaysia to revive abandoned housing projects in Malaysia. Through his experience as the CEO of TPPT Sdn. Bhd. , Hidzir is very much well versed with the housing industry in Malaysia.