Fetch the worker employment history effective start date and effective end date

Summary:

We have a requirement to fetch the employment history’s effective start date and effective end date. Currently, I can retrieve the employment history using the API:

/hcmRestApi/resources/11.13.18.05/publicWorkers?q=PersonNumber={PERSON_NUMBER}&expand=assignments.employmentHistory

Example:

"employmentHistory": [
{
"AssignmentId": 111111111111111111,
"Name": "IT Specialist II"
},
{
"AssignmentId": 111111111111111111,
"Name": "IT Specialist I"
},
{
"AssignmentId": 111111111111111111,
"Name": "IT Associate"
}
]

Problem:

I need to retrieve the effective start date and effective end date for each position. For example, I need the effectiveStartDate and effectiveEndDate for the “IT Specialist II” position.