How to automatically set value for one filed based on value of other filed when data was imported from Excel file

How to automatically set value for one filed based on value of other filed when data was imported from Excel file

Hi everyone,

I need your help on  this. I imported data from excel file. One of the filed is Analyst Name, I want to add "Department" based on the name found in "Analyst Name". 

For example: If the analyst name is Mark or Peter or Marie, The Department filed would be "Research", if name is Jubin, Relji,... the Department field would be "IT support".

Thank you