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Wong Onn Chee
SABSA Chartered Architect,

Chief Executive Officer

Onn Chee's areas of expertise include information leakage protection, web security and security strategy. Onn Chee is also one of the co-inventors for at least six international PCT patents.
He is the current Chapter Leader of OWASP Singapore. He is also a member of the working groups which developed Singapore's first standard on cloud security and Technical References on IoT Security.

Rajesh Sreenivasan

Rajesh has over 20 years of experience advising state governments and multinational corporations in the telecommunications, computer hardware and software sectors.
Rajesh is ranked as a Tier 1 lawyer by Chambers Asia-Pacific 2018 who is “highly prized by multinational technology companies for his expertise in data protection, telecoms regulation and cybersecurity.”
Regionally, Rajesh is assisting the ASEAN Secretariat on a pan-ASEAN forum to address convergence of IT, telecoms and broadcasting and by the Commonwealth Secretariat to co-lead an e-government capacity building exercise.

Steve Tan

With more than 20 years of legal experience, Steve is at the forefront of data protection and cybersecurity work and developments in Singapore as well as in Asian regional countries. Steve has assisted clients across multiple industries on cyber/data security matters, conduct of cyberbreach simulation exercise, data breach incident response, data protection law compliance. Steve conceived our 24x7 365 days a year standby incident response service, and has been activated by many organisations to deal with data/cyber incidents.
Steve is recognised as a leading lawyer for TMT, data protection and/or cybersecurity work in many legal publications including Legal 500, Chambers Asia Pacific, Who’s Who Legal: Data, Best Lawyers. Steve is cited as “one of the best in the field of personal data protection” (Legal 500 2017). In Chambers Asia Pacific 2019, Steve receives praise from a client who characterises him as a "truly dedicated and passionate TMT lawyer. His knowledge in data protection laws and understanding of policymaking are key. His wealth of experience in this area of law gives me the confidence that I have been advised by one of the best in class”. In Legal 500 2019, Steve is cited as being “one of the gurus in the field of data protection”. Steve achieved top 10 in the Financial Times (FT) Asia-Pacific Innovative Lawyers Award 2019. In Legal 500 2020, a client gave testimony that “Steve Tan has great depth of knowledge for PDPA matters. Strategic, sound in advice and very responsive”.  In Legal 500 2021, a client gave testimony that “Steve Tan – he is an icon in the data privacy arena. Has a great depth of knowledge as the subject matter expert and one of the sought after authorities in this field. Is very responsive and able to provide quick, practical advice.”; another client stated “Steve Tan is a leading expert in data privacy and has provided us valuable insights …”. Steve was additionally picked as a top 30 individual practitioner worldwide for Privacy and Data Protection in Best of the Best Global Expert Guide 2019.


(Adjunct Professor)


Join the Team

Rajah & Tann Cybersecurity is always looking for dynamic, passionate individuals who want to join and grow our multi-disciplinary team of allied legal professionals.

To see a list of current job openings, click down below.

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