Mislintat joins the Gunners after a decade of service at Dortmund, replacing Steve Rowley, who has left his position as chief scout after 25 years.
He will work closely with manager Arsene Wenger and chief executive Ivan Gazidis.
'We are delighted that Sven is joining us,' Wenger said. 'Identifying and developing talent is a core part of our philosophy and Sven has an outstanding track record over many years. We look forward to him taking our existing recruitment approach forwards.'
— Arsenal FC (@Arsenal) 20 de novembro de 2017
'Bild' also reported that Arsenal want Dortmund chief Michael Zorc, but the German club have since said he won't be leaving.