The former chairman of scandal-tarnished Raiffeisen is back – as a professor at one of Switzerland's most prestigious business universities.

This week, students at the University of St. Gallen return for spring semester – and Raiffeisen's former chairman Johannes Rueegg-Stuerm resumes his lectures. The finance professor was chairman of the Swiss lender for seven years, in a period for which the CEO at the time, Pierin Vincenz, is being criminally investigated.

Rueegg-Stuerm stepped down hastily last March, and also took a break from academia. Now, he is back teaching master's students in «strategies in creative economies» as well as «change management», Swiss daily «St. Galler Tagblatt» (in German) reported on Monday. 

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The erstwhile banker's surprise reemergence comes as his successor at Raiffeisen, Guy Lachapelle, grapples with change management of his own: the bank has since swept clean most of its board and management of executives and overseers from the Vincenz era. It has also sold down stakes accumulated during the Rueegg-Stuerm and Vincenz tenure.

Lachappelle is also tasked with reviewing the cooperative structure of the bank, which recently kissed off $300 million. Meanwhile, besides Rueegg-Stuerm's academic role, he wrote a book about management in healthcare during his sabbatical semester.