Qualfon operate in Monterrey .
Monterrey is also home to international companies such as Siemens , Accenture , Ternium , Sony , Toshiba , Carrier , Whirlpool , Samsung , Toyota , Babcock & Wilcox , Daewoo , British American Tobacco , Nokia , Dell , Boeing , HTC , General Electric , Gamesa , LG , SAS Institute , Grundfos , Danfoss , Qualfon and Teleperformance , among others .
Monterrey