hi,

See Isro is one of the major space research center of India . Every year numerous vacancy comes for engineering, scientist, scientific assistant, technician, diploma graduates, ITI certified candidates as well. however it is difficult to predict the availability of vacancy every year. so I suggest you to check the isro career page weekly and also registered for govt job alert sites.

the major recruiters of chemical engineers are ongc, IOCL, BPCL like psus.

hope you understand.