Born in Basel, Switzerland, Schaller is the daughter of a diplomat who served across South America and Europe throughout her childhood.

[1] Schaller has worked for the Swiss Federal Department of Foreign Affairs at The Mission of Switzerland to the European Union in Brussels and has held roles in the financial and sports Industry, as well as in the NGO sector.

She also handles the Adecco Group's engagement in Employers' Association at global and European scale, as well as international institutions.

[4][5][6] She serves as vice-chair of the Business OECD (Organisation for Economic Co-operation and Development) Employment, Labour and Social Affairs Committee,[3][7] as a co-chair of the G20-B20 Future of Work and Education Task Force,[3] a member of the B20 International Advocacy Caucus,[8] a steering group member on the World Economic Forum Center for New Economy and Society[6] and for the Global Apprenticeship Network[3] and an Advisory Board Member of Asia Society Switzerland.

Schaller is a co-founder of the Boardroom, the Swiss arm of the international community of women executives focused on bridging the gender gap on corporate boards.