Ries, a 14-year SAP veteran, will also serve as labor relations director in addition to his role as CHRO and member of the global managing board of the software company, SAP said Thursday.
Prior to SAP, Ries held HR management roles at Microsoft and Compaq Computer.
Singh will continue to lead SAP’s business network group and serve as CEO of Concur, which SAP purchased in 2014.
The technology and corporate travel industry veteran has been on the global managing board of SAP since January 2015.
Singh previously worked at Symantec and Apple before he moved to Concur.