Presently, Thomas Treß holds the position of Chief Financial Officer at Borussia Dortmund GmbH & Co. KGaA and Managing Director at BVB Stadion Holding GmbH, Co-Managing Director at Sports & Bytes GmbH and Co-Managing Director at Borussia Dortmund Geschäftsführungs- GmbH (which are all subsidiaries of Borussia Dortmund GmbH & Co. KGaA).

He previously occupied the position of Partner at Baker Tilly Roelfs AG Wirtschaftsprüfungsgesellschaft.