NO , According to me UPSC Does not Conduct any Recruitment Examination for ISRO UPSC is the only hiring process for Indian Gov. Officers for different sectors.
there is nothing for ISRO.

For knowing the details of the Recruitment of ISRO you may go to the official site of ISRO

The page may look as follow :



There at the Bottom of the page you may Find the Menu of Career click on it After clicking you may Redirect to the page from there you may get the details of the Recruitment of ISRO

for your Convince here I am giving you the Snapshot of that page