Administrative Assistant

We are looking for a dedicated Administrative Clerk that is able to handle simple invoicing, quotations, customer calls, daily queries and scheduling.
The main job scope:
To handle simple invoicing
To bill out quotations to clients
To answer customer calls
To attend to emails from customer
To schedule work calendars and tasks
Able to start immediately. Past experiences will be a plus.
Interviews: 1 to 2 rounds of Interviews
Language needed: Proficient English (compulsory)
Working hours: Monday to Friday 830am to 6pm
Salary: Depending on relevant experiences, performance and work accomplishments.