May 29 (Reuters) - Zscaler ( ZS ) named Kevin Rubin as

its chief financial officer and beat Wall Street estimates for

third-quarter revenue on Thursday, as businesses spend more on

cybersecurity networking solutions to combat sophisticated

online threats.

For the third quarter, ended April 30, Zscaler ( ZS ) posted

revenue of $678 million, compared with the analysts' average

estimate of $666.4 million, according to data compiled by LSEG.