A career legal practitioner, Mwanaidi Maajar was Tanzania’s Ambassador to the United States of America and High Commissioner to the United Kingdom between 2006 and 2013. She is holder of an LL.M., and an LL.B. (Hons) both from the University of Dar es Salaam, and short professional courses in Italy, Tanzania, and the United States.

She is Chair of REX Advocates, which changed its name in August 2019 from ENSafrica Tanzania Attorneys, www.ensafrica.com the successor firm to REX Attorneys, of which she was one of the founding partners. She heads the Natural Resources Law Practice at REX Advocates which covers energy, mining oil & gas as part of general corporate commercial practice. She is an advocate and a leading corporate legal practitioner.

Amb. Maajar is a member of Tanganyika Law Society (TLS) and one of the founding members of the East Africa Law Society (EALS) and the Tanzania Women Lawyers Association (TAWLA).