Singapore Expats

I'll be relocating to Singapore and my employer will pay for one-on-one Mandarin classes (I'm an intermediate-level speaker; reading/writing ability has lapsed considerably, though). While there are clearly many private tutors available, for bureaucratic reasons my employer will only pay for classes arranged via an established language school (even though that will cost more than arranging lessons w/ a private tutor). Can anyone recommend a school? Berlitz appears to be fine but costs top dollar; Spring Language Cenetr also appears to be good and to able to schedule classes flexibly. Thanks for the help.