"We have got some infrastructure, too, that we are embarking on to make us go faster, and therefore a driver like Sebastian, who brings with him the experience of winning four world championships and 53 races can only be beneficial for us.
"He will help us take that next step that we need in the coming years so that we can consistently race with the top three or four teams."
While Vettel has struggled in recent years, making a number of high-profile errors, Szafnauer remains confident the German will return to the form of old.
"He is 33 years old, he is still in the prime of his career," he added. "He has got a vast amount of experience and is extremely motivated to do well.
"He works really hard and we believe with our team and where we want to take it to, Seb is a perfect fit for that. I am confident he will race well."
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