Previously Mr Makary was the Head of MENA/GCC operations at Business Development Asia LLC in Bahrain where he was responsible for building the firm's regional footprint. In 2006, Mr Makary joined Dubai Investment Group, where he served as Project Manager on the firm's multi-billion dollar acquisition of a stake in Tunisia Telecom, alongside Dubai Holdings' TeCom investments. Prior to this, Mr Makary worked for EFG Hermes in Cairo as a Vice President helping to shape the region's emerging investment banking industry. He went on to help establish the business' Dubai corporate finance operations and worked on the advisory team responsible for the privatization of the UAE telecoms market. He began his career at ABN Amro's investment banking TMT group in New York.

In 2008, Tamer was recognized for his work in advising Seera Investment Bank (formerly UIB) on its US$ 200 m buyout of BWA Water Additives, a deal named by the FT's Banker Magazine as the European Islamic Finance Deal of the Year.  More recently, in 2010, Tamer secured Qatar National Bank as a 'Standby Buyer' in the Rights Issue for a controlling stake in Bank Kesawan, marking the first ever investment by a Middle Eastern bank into the Indonesian conventional banking sector.

Mr Makary graduated with a Bachelor of Arts in Economics from Columbia University and an International Economics and History Degree from the London School of Economics.