Managers and staff trained or coached by Klaus Lassert came from the following companies:

• Bosch
• Biederlack
• Bertelsmann
• Beiersdorf
• Citibank
• Cognis
• Deutsche Bundesbank
• Deutsche Bank
• European Investment Bank
• Global Telesales
• Lenze
• Lufthansa
• Metro
• Merck
• Obi
• Tesa
• and more...