The Swiss bank's head of impact investing is being put forward for the board a Swiss telecom firm in the throes of a takeover.

Sunrise is proposing Marisa Drew, Credit Suisse's head of sustainability, to be elected to its board, according to the invitation to its November 9 shareholder meeting. A veteran investment banker, Drew made a name as an adviser to telecoms and technology firms in her previous role at the Swiss bank as co-head of investment banking and capital markets.

Ex-CEO Tidjane Thiam plucked her from the securities unit and appointed her CEO of impact advisory and finance. She was recently promoted in a broader rewiring of Credit Suisse's emphasis on ESG, or environmental, societal, and governance, criteria. 

Drew's board election as well as that of several other proposed new directors is contingent on Sunrise shareholders selling to rival UPC. If the 6.8 billion Swiss franc ($75 billion) deal succeeds, both firms will belong to Liberty Global. The move follows a failed attempt by Sunrise to buy UPC, which the target firms's shareholders torpedoed.