The team have a whole-new line-up for the 2019 season, with F2 Champion George Russell alongside the Polish driver at the team.
As the team look to turn their fortunes around, though, the latter has explained that they are facing difficulties with personnel.
“It’s not an easy period because many people are leaving,” Kubica told Eleven Sports.
“And it’s difficult to find good employees when they see that the team does not have a fast car.
“Most people have a passion and want to work in the best teams.”
Arguably the main person in a team from a driver’s point of view is their race engineer. However, the Pole does not who he will be working with next year.
“This was one of the main topics before signing the contract,” he added.
“But I have not received an answer yet.
“I tried to find out this weekend so that I can work with this person in the tests, because it’s already time to start working well.”
In regards to the car’s performance for next season, the 2008 Canadian GP winner is not expecting miracles.
“I’ve been in the paddock too long to be concerned about a car that will only be on the track at the end of February. Because it will change nothing,” the Pole continued.
“In 2008, in BMW, we were missing four seconds in the tests but in two months we turned the situation around. Williams is in a different situation to that.
“There will not be such miracles. I approach next season very realistically.
“If we are in eighth or ninth place in Australia, it will be very good. But it is not up to me to set such goals.”