The pitch covers creative, media, and digital marketing duties and the appointment is for a year.
Amidst the portfolio expansion, Adam will continue to be based in Kuala Lumpur, splitting her time between Malaysia and Singapore.
With her expanded portfolio, Adam's team will grow from eight to 21 employees.
Siew was previously with AXA Affin Insurance for about four years.
"Tech is a great enabler, but we still need people to understand it, plan it holistically and integrate it across the channels to drive the business."
"We can work with sophisticated partner agencies. But if we are not quite ready internally, there will be a huge gap in effectively maximising the potential of the data."