Health assessment and life management of high voltage equipment in New Zealand and Australia, sales representative for PDC equipment 

T Service Center Nuremberg
Online services for transformers 

Independant institution offering a multitude of diagnostic services on high voltage devices and installations in and around Switzerland  

Weidmann Electrical Technology
Products and services for power and distribution transformers
Electromagnetic Services 

Pfiffner Instrument Transformers Ltd
Manufactorer of instrument transformers  

Presco AG
Manufactorer of test instruments for high voltage apparatus