I don't know too much about how employers view the SCJP,
however I do know that I'm a much better Java programmer as a result, and consequently am more confident about applying for Java jobs. I would have no hesitation about applying for a senior java role now... despite having limited work experience with java.
I would recommend however, that you also study about design
patterns and coding standards etc. These are things which the SCJP doesn't test on.
Although, you could also try the
SCJD, as this tests on these things.