The Stuttgart academy product holds the distinction of being the youngest goalkeeper to feature in a Champions League match when he played for Leverkusen against Chelsea in 2011 at just 19 years and 193 days old.
First-team coach Pablo Villanueva, strength and conditioning coach Julen Masach, goalkeeping coach Javi Garcia and data/video analyst Victor Manas complete Emery's staff.
Emery told the club website: 'Bernd is a goalkeeper of high quality and experience.
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Leno is considered as one of the best goalkeepers in the Bundesliga, and is expected to move to the Premier League in a £22m Deal.
Leno did have Gunners' fans excited last week when he "liked" an Instagram post linking him with a move to the Gunners.
The highly rated goalkeeper failed to get a call up in the Germany squad for this summer's World Cup in Russian Federation.
Germany global Leno has six caps for his country, but isn't with them at the World Cup.