This work presents a grid environment, based on UNICORE 6 middleware, which was used to analyze their security levels, compatibility with other middlewares and the resources available to integrate, visualize and manage different computational electromagnetic applications. The flexibility and performance of this approach is presented in two examples. Fist, a multiplatform CAD software developed in Java to design electromagnetic devices was encapsulated in this environment. The second application encapsulates a parallel FDTD 3D code developed in C++ and processed in a computer cluster. The results show the grid's high performance, efficiency, management easiness and portability, characterizing it as an important tool to share computational resources and to reuse them. ©2009 IEEE.