He started his career as a veteran lawyer in the end of 2007 and day by day he gets to prove his professionalism, efficiency and expertness acquiring trustworthy of his clients and respect of his competitors and the official authorities , he acted as the legal counselor for many entities : PHD (Palm hills development) – HSBC –Memaar Elmorshedy – Sama Cairo Group – Venus international group – Egyptian housing finance company – EMRC-EGYPTIAN MORTGAGE REFINANCE COMPANY – shams group . Dr. Ali yassien acquired, due to his studies, great experience, knowledge and reputation in the field of arbitration which qualified him to be appointed as an arbitrator in various arbitral tribunals where he proved a lot of professionalism, efficiency and wisdom. He also is well informed about Egyptian and International market updates through courses and conferences he attended in Paris, Dubai, Sharjah , Ajman, Egypt, Italy, Holland, and other countries , also he has played and continues to play a key role in drafting new legislation and developing existing economic legislation as adviser to the various governmental entities and as member of the national drafting committees on many important laws (Commercial law , Shipping and aviation law , mortgage law , uniform building code , illegal immigration law , Sports law he also called for promulgating a law for constructing International Suez canal Arbitration Center and presented a draft to the competent authority )