Ger Koole is a mathematician with a background in operations research and applied probability theory, especially queueing models. He applies these techniques to the service sector, mainly in call centers and health care. He is full professor at VU University Amsterdam and co-founder of CCmath, a software firm specialized in call center workforce management. Ger regularly gives trainings for professionals in call centers and health care. For feedback on his work or inquiries about his trainings please contact him at [email protected].