Before Milliman, Thomas worked as an actuarial consultant at vtmw AG in Munich for six years.

Insurance companies consulted by Thomas Kaufmann include (in chronological order):

• Wüstenrot&Württembergische (W&W) in Stuttgart
• ERGO in Dusseldorf
• Versicherungskammer Bayern (VKB) in Munich
• ATHENE Lebensversicherung (now: Athora) in Wiesbaden
• WWK in Munich
• ITERGO in Hamburg
• Barmenia Lebensversicherung in Wuppertal
• Viridium Gruppe in Neu-Isenburg