In 2016, Barbara Wösner Sandberg founded the private-equity firm BAST AG. Previously, from 1998 to 2001, she led the Marketing Department at the Raiffeisen Banking Group Upper Austria,  and was a member of the strategic planning team. In 2001 Wosner-Sandberg was Marketing Manager at the Vienna Stock Exchange. There, in 2002, she took over as head of Strategy, Marketing & Acquisition, and in 2005 as Head of International Alliances. In the same year she was appointed to the Executive Committee of the Vienna Stock Exchange. In 2005, following the acquisition the Budapest Stock Exchange, she moved onto the Board of Directors.