Shumba's accolades extend to having served in the Special Forces (The Parachute Group) of the Zimbabwe National Army from 1983 to 1989.
[citation needed] Shumba left Zanu PF in December 2017 following the coup, leading to the formation of the United Democratic Alliance (UDA).
On 18 January 2018, following the coup and political gamesmanship in Zanu PF, Shumba was withdrawn from the Parliament of Zimbabwe.
Upon leaving the Defense Forces, Shumba emerged as a leading entrepreneur after setting up and managing Systems Technology, an ITC business.
Systems Technology was a leading supplier of ITC equipment and services to the government of Zimbabwe, Educational Institutions, Mining sector, banks, and to other corporates.
The Advocacy Forum's main agenda is to ensure and monitor national adherence to the Rule of Law, and the tenets of Constitutionalism.