This work presents an efficient high performance computational environment applied to process parallel and distributed electromagnetic applications. The procedure to validate this entire solution consists of two different tests, considering improvements in parallel performance and reduction in financial costs were considered. At first, various configurations were performed in the cluster in order to achieve an efficient parallel performance. The second sequence of test consider a parallel three-dimensional version of FDTD 3D with multi-dimensional distribution. In both tests the results present efficient performance and the financial costs were outstanding reduced with free software. In addition, the current infra-structure is flexible enough to be applied in different electromagnetic applications. ©2009 IEEE.