Opérateur de transport de Wallonie (French pronunciation: [ɔpeʁatœʁ də tʁɑ̃spɔʁ də walɔni], Transport Operator of Wallonia, OTW), formerly Société régionale wallonne du transport ([sɔsjete ʁeʒjɔnal walɔn dy tʁɑ̃spɔʁ], Walloon Regional Transport Company, SRWT), is responsible for the supervision, strategic planning and marketing of a group of five regional public transport directorate branded as TEC or "Transport En Commun" (French for: Public Transport) in Wallonia, Belgium.

[1] TEC sells the MOBIB smartcard branded "TEC it easy" and runs a chain of shops called Espace TEC.

Most of TEC buses and trams in Charleroi are distinctively painted yellow and red.

TEC was founded in 1991 through the breakup of the former Belgian NMVB/SNCV into separate companies for Wallonia and Flanders.

In 2019, Société régionale wallonne du Transport (SRWT) became Opérateur de transport de Wallonie (OTW).