Who is Aberdeen managerial candidate Schwarz?

After all the noise around Eirik Horneland potentially becoming Aberdeen's new manager, the trail went cold until a new candidate emerged this week. Chairman Dave Cormack confirmed former Mainz and New York Red Bulls boss Sandro Schwarz is in the city for talks with the club over the vacancy. Schwarz is a friend and former Mainz team-mate of Jurgen Klopp and favours the same high-intensity, counter-pressing style.