Employment History Import Template to be created

Conditions:
1) Employee Code, Company Name, Duration, Nature of Work, Exposure History to be mandatory
2) Allows duplicate Employee Code and will add Grid Views in the same Employee Detail
3) Allows Update
4) All fields accept Text data that also includes special characters
5) If duplicate records for the same employee is available, then Job Description mentioned in the last column for that specific employee will be updated. 