In 1999, Lewin obtained a Bachelor of Music from the University of Cape Town in 1999 and then with a Bachelor of Laws (LLB) in 2007: he has been a litigation attorney for over a decade having mediated to restoration in professional and non-professional matters.

Admitted as an Attorney to the High Court in 2010, Lewin has acted for corporations and individuals in a variety of industries, including the sport, hospitality, and health sectors.
Lucien Lewin Lewin Attorneys entered a merger with Dingley Marshall Lewin Inc. in March 2017, operating as a niche commercial law firm, specialising in Information Technology Law.

Armed with a Black Belt (Kimura-Shukokai) and national colours in Karate, Lewin has acted for companies including Virgin Active South Africa and Cricket South Africa and has successfully represented the homeless living in the City of Cape Town by enforcing their constitutional rights.