Siraj co-leads the dispute resolution practice in the firm and heads its criminal defence practice; specializing in commercial litigation and criminal defence work. Siraj has been recognized as one of Asian Legal Business’ Singapore’s Rising Stars 2023, and was also conferred the LexisNexis 40 under 40 2024 (Southeast Asia) Award and the LexisNexis Under 40 National Recognition 2023 Award. Silvester Legal LLC’s Criminal Defence practice, led by Siraj, was acknowledged by The Straits Times in its 2025, 2024 and 2023 list of Singapore’s best law firms. Siraj has also been listed as one of Singapore’s “”Best and Highly Rated Criminal Lawyers”” in 2025, 2024 and 2023 by the Singapore Legal Advice web portal.

To date, Siraj has acted as lead counsel representing close to 150 accused persons at the State Courts and Supreme Court for Penal Code and other regulatory offences (ex., CDSA, Computer Misuse & Cyber Security Act, Employment of Foreign Manpower Act, Prevention of Corruption Act and Companies Act) He has successfully secured conditional warnings, community-based sentences, and acquittals for serious property, violent and sexual offences (including money laundering, motor insurance fraud, rioting, causing grievous hurt and outrage of modesty amongst others) involving young and adult clients at both pre-and post-trial stages.

Siraj also a practice in civil and commercial litigation with successful lead counsel experience before the Singapore State Courts and Supreme Court in employment, investor and shareholder disputes as well as contractual, tortious and intellectual property infringement claims. Siraj continues to be entrusted by Silvester Legal LLC to take on high-stakes cases in commercial litigation as lead counsel.  

Siraj also participates in the work of the Singapore Law Society’s Criminal Practice Committee as well as the Pro Bono SG’s Criminal Legal Aid Scheme Committee where he has headed sub-committees to recommend expanded coverage of criminal legal aid to a larger pool of offences and to prepare a curriculum to train volunteer lawyers engaged in pro bono criminal defence work. He is also a volunteer with the Criminal Legal Aid Scheme through which he has provided pro bono representation.  

Siraj graduated from the Singapore Management University (SMU). During his time at SMU, Siraj represented the university as an oralist in international mooting competitions and his teams emerged as quarter-finalists in the Oxford Monroe E Price Moot Court Competition 2014 and the University of Hong Kong Red Cross International Humanitarian Law Moot Court Competition. Siraj was also a finalist in local competitions such as the NUS Advocacy Cup 2015 and the Rodyk Moot Challenges in 2013 and 2014.  Apart from mooting and legal advocacy competitions, Siraj also represented SMU as a debater in international competitions; obtaining Top Speaker Awards at regional debating competitions (such as the  Asian British Parliamentary Debate Championship 2010 and the ICRC International Humanitarian Law Debate Championship 2011. Siraj was also awarded the SMU Rajan Rishyakaran Debating Excellence Award in 2012 which is awarded to the top debater of the SMU debate contingent.