At the Office
Prepositions of Place, Similarity and Function
Use 'in' with countries, cities, towns and regions.
Example:
The appreciation of homes in Litchfield County has slowed.
Our client needs to evaluate assets and liabilities in the city of Atlanta for himself.
Use 'at' for place in a city, town or village.
Example:
We will meet you at the Citigroup building.
I am the endorser at my company.
Like and As
Use 'like' as a preposition to express that two are objects are similar in some characteristic.
Example:
These are outstanding credits like the ones I sent out last week.
Overdraft protection is like a safety blanket for your finances.
Use 'as' to express the function that a person takes in an organization.
Example:
Tom, in his role as the project manager, is responsible for the due diligence.
As an employee of the firm you are expected to perform due diligence.