Royal Dutch Shell (USA, Netherlands, United Kingdom, Malaysia, Nigeria)

Chevron (USA)

Dow Chemical (USA)

Civil Service College (Singapore) (USA)

The Coca-Cola Company (USA)

Bellsouth (USA)

Club Med (USA)

PSEG Nuclear (USA)

TechnoServe (USA)

Ferris State University (USA)

Lonestar College (USA)

Siemens (Germany)

Werndl Office Furniture (Germany)

Audi (Germany)

SV Versicherungen (Germany)

SCA (Germany)

Deutscher Lloyd Insurance (Germany)

Generali (Germany)

Versicherungskammer Bayern (Germany)

Harrasser and Partner (Italy)