Nyrstar announced the appointment of Bob Katsiouleris as gm of commercial operations by replacing Maarten De Leeuw as he takes on another role within the company. Katsiouleris joins the company from Rio Tinto, where he served as chief commercial officer of the titanium, diamond and borax business. He will relocate to company's Zurich headquarters from Denver, Colorado, and is set to start in January.

Katsiouleris takes over from De Leeuw as he relocates from Switzerland to the Netherlands to take on a new role that will be announced in the first quarter of the year.