work for/in/at

[Itasan]

Does each of the following mean the same thing?
If not what is the difference?
1. I work for/in/at ABC University.
2. I work for/in/at the ABC Company.
Thank you.

[Tdol]

'at' suggests it could be more temporary.

[Itasan]

Thank you very much, tdol.

[Dippit]

Hi Itasan,

'in' here suggests a specific type of work - 'I work in the defence industry'.

'at' would suggest a place that is well known - 'I work at the Whitehouse'.

'for' would suggest a particular employer - 'I work for the FBI'.

Hope this helps,
Dippit