[Date]

[Addressee]

Dear [Name]:

This is to inform you that an opportunity has presented itself 
that will enable me to work in the area of my stated 
preference, which is [designate].
 
Therefore, I am tendering my resignation from your company.  
The last day of my employment will be [date].  At that time I 
shall deliver all property of the firm in my possession. 

Thank you for the experience of having worked for [name of 
firm], a truly outstanding organization. 

Very truly yours,