Haas team boss Guenther Steiner has insisted that the team will be careful not to expand too quickly, with the budget cap set to come into play in 2021.
Steiner revealed to Autosport that he felt it was better to take things step by step.
"I believe that it's better to grow slowly," he said.
"Just throwing money and people, that normally doesn't work.
“We [also] don't want to start with doing everything ourselves because a lot of clever people tried and it didn't work.”
"The only thing you can not buy in life is time.” Added Steiner.
“But everything else you can buy, so I think we need to keep on growing.”
“Do we need to grow? Yes, absolutely, but I don't want to go at the speed of 200-300 people a year, because at the moment we have got 160.”