Atlanta appears to be facing a transitional offseason. The 2018 MLS Cup Champions sold three of their biggest names last summer, raising $42 million with the departures of Thiago Almada, Giorgos Giakoumakis and Caleb Wiley.
There was also change in higher positions, with manager Gonzalo Pineda removed from in early June. Technical Director Carlos Bocanegra also left the club shortly after.
Viera, for his part, is no stranger to MLS. The Frenchman coached NYCFC for more than two seasons in his first managerial job.