After earninog his stripes with the AGC,  Sinna then joined the ranks of the Inland Revenue Authority of Singapore (“IRAS”) as a Legal Officer. His job scope there saw him expand his area of expertise from criminal to civil works. As a Legal Officer with the IRAS, Sinna was tasked with prosecuting offenders evading Income Tax and Goods and Services Tax. He also had to conduct trials assessing Property Tax matters at the Valuation Review Board (“VRB”) as part of his civil works portfolio.

After entering private practice, Sinna is most famed for his work and successes in the practice of Criminal Law. His legal mettle was honed during his term at the AGC and IRAS, which saw him tackle all areas of offences imaginable in Singapore, ranging from the petty to serious crimes.Using his experience as a prosecutor, Sinna has translated his expertise in criminal prosecution to defending clients from all walks of life.

Besides being well-versed in the practice of Criminal Law, Sinna has provided expert and invaluable counsel in other areas of law such as Family Law, Arbitration, Bankruptcy and Insolvency Law, Corporate Law, Landlord and Tenant Law, Probate and Administration of Estate, Vehicle Accident, Personal Injury and Tax Law.