Dewji served as Member of the Tanzanian Parliament for Chama Cha Mapinduzi (CCM) from 2005 to 2015 for his home town of Singida.

[9] In 1992 his father enrolled him at the Arnold Palmer Golf Academy in Orlando, Florida, where Dewji also attended Trinity Preparatory School for 11th grade.

[10] Dewji attended Georgetown University in Washington, D.C., graduating in 1998 with a bachelor's degree in international business and finance and a minor in theology.

[11] Upon graduation from university, Dewji returned home and assumed the management of Mohammed Enterprises Tanzania Limited (MeTL), a commodities trading business founded by his grandmother, according to his recent instagram video.

In the early 2000s, when the Tanzanian government privatized loss-making companies, he acquired them inexpensively and turned them into profit centers by trimming personnel expenses.

MeTL Group has investments in manufacturing, agriculture, trading, finance, mobile telephony, insurance, real estate, transport and logistics, and food and beverages.

[20] In 2000, Tanzania hosted its second multiparty elections where Dewji, at the age of 25 competed to become the Member of Parliament (MP) for Singida Urban.

Despite winning the preliminary votes for the ruling party, Chama Cha Mapinduzi (CCM) with an overwhelming majority, Dewji was deemed too young to hold the parliamentary seat.

Tanzania held its third multi-party elections in October 2005 and Dewji stood for the parliamentary seat again and was chosen by CCM to stand as a candidate for Singida Urban.

[23] At approximately 5:35 am on 11 October 2018, Dewji was kidnapped and abducted by armed gunmen outside the Colosseum Hotel in Dar es Salaam, where he was arriving for a morning workout.