The following program helps to develop the employee management system:

# import statement
import pickle
import os

# Create a class named Employee
class Employee:
    def __init__(self, emp_id, name, department, job_title):
        self.emp_id = emp_id
        self.name = name
        self.department = department
        self.job_title = job_title

# Create a function named load_employees to store the employee data in pickle file
def load_employees(filename):
    if os.path.exists(filename):
        with open(filename, 'rb') as file:
            return pickle.load(file)
    return {}

def save_employees(filename, employees):
    with open(filename, 'wb') as file:
        pickle.dump(employees, file)

# Create a function named lookup_employee().
# This function helps to check the employee details present in the object or not.
def lookup_employee(employees):
    emp_id = input("Enter the Employee ID to look up: ")
    employee = employees.get(emp_id)
    if employee:
        print(f"Employee ID: {employee.emp_id}")
        print(f"Name: {employee.name}")
        print(f"Department: {employee.department}")
        print(f"Job Title: {employee.job_title}")
    else:
        print("Employee not found.")

# Create a function named lookup_employee().
# This function helps to add employee in the list
def add_employee(employees):
    emp_id = input("Enter the new Employee ID: ")
    name = input("Enter the new Employee's Name: ")
    department = input("Enter the new Employee's Department: ")
    job_title = input("Enter the new Employee's Job Title: ")

    new_employee = Employee(emp_id, name, department, job_title)
    employees[emp_id] = new_employee
    print("Employee added successfully.")

# Create a function named change_employee().
# This function helps to edit the employee details
def change_employee(employees):
    emp_id = input("Enter the Employee ID to update: ")
    if emp_id not in employees:
        print("Employee not found.")
        return

    name = input("Enter the updated Name: ")
    department = input("Enter the updated Department: ")
    job_title = input("Enter the updated Job Title: ")

    employee = Employee(emp_id, name, department, job_title)
    employees[emp_id] = employee
    print("Employee details updated successfully.")

# Create a function named delete_employee().
# This function helps to delete the employee details.
def delete_employee(employees):
    emp_id = input("Enter the Employee ID to delete: ")
    if emp_id not in employees:
        print("Employee not found.")
        return

    del employees[emp_id]
    print("Employee deleted successfully.")

# Create a menu
def display_menu():
    print("\nEmployee Management System Menu:")
    print("1. Look up an employee")
    print("2. Add a new employee")
    print("3. Change an existing employee's details")
    print("4. Delete an employee")
    print("5. Quit")

# Create a main function
def main():
    filename = "employees.pickle"
    employees = load_employees(filename)

    while True:
        display_menu()
        choice = input("Enter your choice (1-5): ")

        if choice == '1':
            lookup_employee(employees)
        elif choice == '2':
            add_employee(employees)
        elif choice == '3':
            change_employee(employees)
        elif choice == '4':
            delete_employee(employees)
        elif choice == '5':
            save_employees(filename, employees)
            print("Employee data saved. Exiting...")
            break
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()

Sample Output:

Python 3.11.4 (tags/v3.11.4:d2340ef, Jun  7 2023, 05:45:37) [MSC v.1934 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.

===================== RESTART: C:/Users/user/Desktop/MWQ.py ====================

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 1
Enter the Employee ID to look up: 2525
Employee not found.

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 2
Enter the new Employee ID: 1001
Enter the new Employee's Name: Alex
Enter the new Employee's Department: Service
Enter the new Employee's Job Title: Lift Operator
Employee added successfully.

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 1
Enter the Employee ID to look up: 1
Employee not found.

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 1
Enter the Employee ID to look up: 1001
Employee ID: 1001
Name: Alex
Department: Service
Job Title: Lift Operator

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 3
Enter the Employee ID to update: 1001
Enter the updated Name: Michel
Enter the updated Department: IT
Enter the updated Job Title: Software
Employee details updated successfully.

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 1
Enter the Employee ID to look up: 1001
Employee ID: 1001
Name: Michel
Department: IT
Job Title: Software

Employee Management System Menu:
1. Look up an employee
2. Add a new employee
3. Change an existing employee's details
4. Delete an employee
5. Quit
Enter your choice (1-5): 5
Employee data saved. Exiting...