In 1991, Hamady began working for the municipality of Nouakchott in the Financial Management division. She became head of the division of the tax census in 1993, and in 1997 she was promoted to head of the department of external relations.[2] In 1999, Hamady became an auditor for the Court of Auditors. She joined the Ministry of Trade and Industry in 2006 and the Central Bank. She served for two years as Director of Competition, Consumer Protection and Fraud Control at the Ministry and subsequently became a member of the Monetary Policy Council of the Central Bank of Mauritania in 2007. In 2009, Hamady became assistant director of SONIMEX, an import and export company. The following year she was made a Commissioner of Investment Promotion.[1] She conducted a meeting of Qatari and Iranian investors and offered her help to achieve their investment projects.[3]
She was appointed as Minister of Public Service, Labour and Modernization of Administration in March 2011. In August 2011, the government increased the minimum wage from 21,000 to 30,000 UM.[4] She served in her ministerial post until December 2013.[1]
On 4 February 2014, Hamady was elected as Mayor of Nouakchott, becoming the first female mayor in the city's history (but not in the history of Mauritania). She defeated Mohamed Ould Elhacen from the moderate Islamist party Tewassoul. "My election is a distinction message of Mauritanian women," she said.[5]