Design pattern for applying a set functions based on the type of data entity

Example: I have different types of employees in office:

• Software engineers
• HR
• Sales
• Marketing

I need to do a bunch of operations on the data of employees:

• Assess year-end performance and give a rating
• Based on rating, calculate performance bonus
• Based on rating, calculate salary hike percentage
• Issue bonus in next pay
• Update salary based on hike percentage
• Send out emails about rating, performance bonus and hike to employees

Problem:

• The operations mentioned above will differ from the type of employee it is operating on(e.g. calculate performance rating for s/w engineer will be different compared to that of marketing person).
• Some operations can be same while same may be enhancement to other operations(e.g. update salary based on hike percentage for software engineer will be same as that for sales person).
• In future there can be addition of new set of employees and a new set of operations need to be written.

My Approach:

• I have a driver class which has a list of operations and the employeeData.
• A method in Driver called executeOperations calls the operations in the list one by one on the data.
• The driver class will be initialised to an object by my main class depending on the type of employee data I am dealing with and the object will contain list of operations relevant to the type of employee data selected from a repository of functions.

What should be a good way to tackle this kind of problem?