The second stage of the multibillion-dollar Parramatta light rail line is in serious doubt after the team working on the project was reduced to a handful of people amid uncertainty about the Berejiklian government's willingness to proceed.

Emails seen by the Herald show those working on plans for the line from Rydalmere to Olympic Park via Melrose Park and Wentworth Point are looking for jobs after work dried up. Up to 50 staff, including contractors and transport agency employees were working on the project two months ago, but that number has since shrunk to about five.

"Everyone is looking for jobs," a source said. "A handful of people have been kept on."

Transport Minister Andrew Constance, pictured with Premier Gladys Berejiklian, has said his priorities are the first stage of Parramatta's light rail line and a new metro line. Credit:AAP

In another blow, the program director for Parramatta light rail, Tim Poole, left his role several weeks ago for a position as chief operating officer at the delivery authority responsible for the Western Sydney Aerotropolis, a precinct next to the new airport under construction at Badgerys Creek.