He was appointed as a minister in the new government after the three principals agreed to expand the cabinet in February.
But the Zimbabwes Constitution stipulates that a cabinet post should be held by a member of parliament and if the appointed minister is not an MP, he or she should find a parliamentary seat within three months.
Sibanda, the Minister for State in the Deputy Prime Ministers Office who doubles up as the MDC-M Deputy President, risks forfeiting his ministerial post since his party exhausted their allocations after using up both their allocated non-constituency seats.
The two senatorial seats were given to party secretary Welshman Ncube and Priscilla Misihairabwi-Mushonga, the deputy secretary general to enable them to be eligible for ministerial positions.
A parliamentary seat was given to Deputy Prime Mutambara, leaving Sibanda in a quandary after being appointed a Minister in Mutambaras Office.
But Prime Minister Tsvangirai told journalists at a press conference in Harare on Thursday that Mutambara assured the other two principals Sibanda would be found a seat by the MDC M.
We have been assured by Deputy Prime Minister Mutambara that they will find Minister Sibanda a seat but I dont know where, said Tsvangirai. Mutambara was not available for comment.
But there are concerns within the small faction of the MDC that Mutambara, who stay at the helm of the MDC M is threatened by rebellion, could axe the suspended legislators and replace one of them with Sibanda.
Of the eight officials suspended by Mutambara and in line for disciplinary action, five legislators, Abednico Bhebhe (Nkayi South), Zinti Mkandla (Gwanda), Maxwell Dube (Tsholotsho North), Sijabuliso Mguni (Lupane North) and Norman Mpofu (Bulima East).