The purpose of this research study is to determine the safety and efficacy of the bortezomib and lenalidomide investigational combination. This drug combination has been used in the treatment of relapsed/refractory multiple myeloma and has been previously investigated in the treatment of MDS and AML, albeit at a lower dose of lenalidomide. In this research study, the investigators are looking for the highest dose of the combination that can be given safely and see how well it works as a combination for MDS and AML in individuals whose disease has relapsed after an SCT.