Hi Naidu,
You can make like this after discussion with client.
Employee Group would be E2 and under that EE subgroup like below.
Sr. Engineer:- 01
Asst Manager:- 02
Dy. Manager:- 03
Then linkage would be
E2 01
E2 02
E2 03 etc.
Hope so you are clear now.
Regards,
Sankarsan