Nhinda was born in Okahao in the Omusati Region of Namibia in 1959. He attended the University of Namibia, where he earned a degree in education. He worked as a teacher before entering politics.
Nhinda was first elected to the Windhoek City Council in 2010. He served as deputy mayor from 2015 to 2020. In November 2020, he was elected mayor of Windhoek, defeating fellow Swapo Party member Fransina Kahungu.
Nhinda is a member of the Swapo Party's Central Committee. He is also a member of the National Council of Namibia, the upper house of the Namibian Parliament.
Nhinda is married and has three children. He is a member of the Lutheran Church.