Add value to new member in arraylist if entry found?

Good afternoon,

I created an arraylist of services from a server. In that arraylist I have seven columns.

DisplayName,Service,Application,StartMode,State,PathName

I would like to at the end of my script check where Application -eq a specific name then append a new column to the array list and populate that one entry with Role = Client for instance.

Then my output would be similar to

DisplayName Service Application StartMode State      PathName        Role

Job Mgr         JBMGR  MyApp       Auto         Running  \\server\c$\Program Files \MyApp\Jobmgr.exe Client

                             $ApplicationDiscovered.Add((New-Object PSObject -Property @{
                                'State' = $AppFound.State
                                'Application' = $AppFound.Application
                                'Service' = $AppFound.Service
                                'DisplayName' = $AppFound.DisplayName
                                'PathName' = $AppFound.PathName
                                'StartMode' = $AppFound.StartMode
                            }))

I was thinking

If ($ApplicationDiscovered.Application -eq "MyApp") {$applicationdiscovered | add-member -membertype noteproperty -name Role -value 'Client}

But of course that appends role to the end and a value by itself rather that at the end of the row which has application MyApp in end.

of something along those lines. Please let me know where I am in error as my brain is fried currently. THank you