Zaher has practised law in the Middle East for over 20 years. He has extensive experience in corporate joint ventures, mergers and acquisitions, restructuring, corporate governance, public offerings, private placements and the related regulatory framework. Zaher has advised on restructuring and acquisition of multimillion-dollar companies in Qatar and abroad. He is also experienced in the field of regulatory compliance associated with funds, sukuk, IPOs and state bonds.

In addition to his corporate expertise, Zaher is recognised for his real estate experience. Over the years, he has counselled both foreign investors and local entities (private and governmental) on a number of large-scale infrastructure projects including the Pearl, Lusail and the Qatar Integrated Railway Project.