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At TK, he is responsible for the Customer Service, Organisation and Infrastructure, Care Management and Health Care Innovation divisions.

He has been a member of the Managing Board since 1 July 2012.

Mr Ballast (born in 1962), who has a degree in Economics, was previously Chairman of the Executive Board of the Verband der Ersatzkassen (vdek) [the Association of Substitute Health Funds]. Prior to that, he held various positions of responsibility in the German statutory health insurance system.