Our Team
Finance & Human Resources
We look after the financial administration and support our employees in all staff-related matters.

ZurichStefania WengerHead of Finance

ZurichEsther PollhammerHR Manager

ZurichMartina DübendorferFinance

ZurichSidar DurmazFinance

ZurichLelani EsterhuizenFinance

ZurichBarbara HessFinance

ZurichFlorence HuegiFinance

ZurichSuheila KammermannFinance

ZurichJane SiuFinance

LondonElizabeth WeedonHead of Finance & HR

LondonDiana AltamiranoFinance

LondonNatalia MalyukManagement Accountant

Aika Idinova
Monday to Friday
8 am – 5 pm (GMT)
Not available on the following public holidays:
- 24.12.2025 Christmas Eve, open 9 am – 2 pm
- 25.12.2025 Christmas Day
- 26.12.2025 Boxing Day
- 31.12.2025 New Year’s Eve, open 9 am – 2 pm
- 01.01.2026 New Year’s Day
- 03.04.2026 Good Friday
- 06.04.2026 Easter Monday
- 04.05.2026 Early May bank holiday
- 25.05.2026 Spring bank holiday
- 31.08.2026 Summer bank holiday
- 25.12.2025 Christmas Day
- 28.12.2026 Day following Boxing Day