How to convert and map javascript object to a proper one

I have main object called data. Under data object I have criticalErrorsData which is a type of array.
Inside that object I have multiple objects like this:

[
    {
        "EmployeeName": {
            "FirstName": "Joe",
            "LastName": "Doe",
            "Suffix": null
        },
        "CriticalErrorCount": 4,
        "HomeDepartment": "Belgrade",
        "SupervisorName": {
            "FirstName": "Test",
            "LastName": "Test",
            "Suffix": null
        }
    }
]

I need to perform .forEach() for all these items inside data.criticalErrorsData and to map it like this:

const criticalErrorsData = [
	{ supervisor:SupervisorName.FirstName + SupervisorName.LastName, department: HomeDepartment, errors: CriticalErrorCount, employee: EmployeeName.FirstName+EmployeeName.LastName },
	{ ... },
	{ ... }
  ];

How can I achieve this? Sould I need to use only.map() function or I need to introduce a helper variable also?

Example of structure of my objects:
data
{
CriticalErrorsData:
{
[0] - this object I want to map
[1] - this object I want to map
[2] - this object I want to map
... - as many as CriticalErrorsData has them
}
}

I also tried something like this:

	  const test = receivedData.criticalErrorsData.map(obj => ({
		
		supervisor: obj.SupervisorName.FirstName + obj.SupervisorName.LastName,
		department: obj.HomeDepartment,
		errors: obj.CriticalErrorCount,
		employee: obj.EmployeeName.FirstName + obj.EmployeeName.LastName
	  })
	  );
		console.log(test);

You can do it with map(). Destructuring in the parameter list will allow you to refer to the properties the way you show.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const data = {
  criticalErrorsData: [{
    "EmployeeName": {
      "FirstName": "Joe",
      "LastName": "Doe",
      "Suffix": null
    },
    "CriticalErrorCount": 4,
    "HomeDepartment": "Belgrade",
    "SupervisorName": {
      "FirstName": "Test",
      "LastName": "Test",
      "Suffix": null
    }
  }]
};

criticalErrorsData = data.criticalErrorsData.map(({
  SupervisorName,
  CriticalErrorCount,
  HomeDepartment,
  EmployeeName
}) => ({
  supervisor: SupervisorName.FirstName + SupervisorName.LastName,
  department: HomeDepartment,
  errors: CriticalErrorCount,
  employee: EmployeeName.FirstName + EmployeeName.LastName
}));

criticalErrorsData.forEach(item => console.log(item.supervisor));

<!-- end snippet -->