Please help me through.. career decision.. NESS TECHNOLOGIES or CSC..?

I would find 3-5 people who are currently working in the embedded software industry, and do a short information interview. This can be done on the phone or even by e-mail - all you are asking is for their story on how they got to where they are, what they feel was most important in terms of what they learned along the way. What this does is give you a clear picture of your path forward, and what experience you need to pick up along the way. Hopefully these conversations will give you enough clarity to evaluate the two positions and see which one will give you more of what you need to achieve your ultimate goal.