Tonkens was previously chief financial officer at Building Materials Europe and replaces Stephen Pope, who is transitioning to a strategic advisory role.
Winnie Chen is due to onboard in Singapore from September, replacing recent retiree, Faisal Ameen, as regional leader of the region’s Global Payments Solutions division.
The former Citi director has an expanded role as CFO and COO at the payment platform which processes over $500m a year and is expanding into New Zealand in the "coming months".
The Australian iron ore giant's acting chief financial officer will move into the role as the company simplifies its operations and amends green hydrogen goal.
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