Merge 2 PowerShell variables - powershell

Question

I have 2 PowerShell variables that include data in the following format. For the first table:
UserName Department
-------- ----------
X#Y.com IT
and data in the following format in the second table:
Country MobileNumber
------- ------------
Singapore +65 8xxxxxxx
and the other variable is the same with different column names and different content. I want to merge the 2 variables to have them in one single variable in that would be in the following format:
UserName Department Country MobileNumber
-------- ---------- ------- ------------
Update:
The result of Ansgar commnet, generate it in the following format:
UserName Department Country MobileNumber
-------- ---------- ------- ------------
{x#y.com, z#y.com} {IT, Sales} {Singapore, Singapore} the same here

Answer 1

Assuming that you have individual objects in your two variables you could construct new objects from them like this:
$obj = New-Object -Type PSObject -Property #{
'UserName' = $obj1.UserName
'Department' = $obj1.Department
'Country' = $obj2.Country
'MobileNumber' = $obj2.MobileNumber
}
If you have arrays of objects (which, judging from your updated question, is the case) you need to build the objects in a loop. Note that this assumes an equal number of objects in both variables. Note also that you MUST ensure that both arrays are in the correct order, unless you have some criteria by which you can match objects from one array to the corresponding object from the other array.
$obj = for ($i=0; $i -lt $obj1.Count; $i++) {
New-Object -Type PSObject -Property #{
'UserName' = $obj1[$i].UserName
'Department' = $obj1[$i].Department
'Country' = $obj2[$i].Country
'MobileNumber' = $obj2[$i].MobileNumber
}
}

Answer 2

I would create a new object and map the properties in a hashtable like this:
First, you have your variables with the data, in this example it is
$Variable1
$Variable2
Then we want to make a Hashtable, this will map the data in each of these two variables to a property in our new object, so we map the two properties Username and Department from the first variable and the Country and the MobileNumber from the second variable.
$properties = #{
'Username'=$Variable1.UserName;
'Department'=$Variable1.Department;
'Country'=$Variable2.Country;
'MobileNumber'=$Variable2.MobileNumber;}
Lastly we create a new object, in this example I call the object $User. We tell this object to contain the properties for our Hashtable:
$User = New-Object -TypeName psobject -Property $properties