Advanced discussions are reportedly taking place to select Al Ahli head coach Jaissle as Howe’s replacement at St James’ Park. Who is Matthias Jaissle? Matthias Jaissle (Courtesy: DFL/Bundesliga)Matthias Jaissle (born April 5, 1988) is a 38-year-old German manager and ex-professional footballer. Which club Matthias Jaissle currently manage? How old is Matthias Jaissle?