AsParallel - Before vs After in Linq Where Clause Performance

I'm having a List<Boss> Collection, every Boss has 2 to 10 Assistant Staff. I'm grouping all the Employees including Boss. Now I'm having List<Person>, from this I'm searching "Raj" using Parallel LINQ, where can I place the supportive method AsParallel() to get better performance, Before or After the Where Clause ?

public class Person
{
    public int EmpID { get; set; }
    public string Name { get; set; }
    public string Department { get; set; }
    public string Gender { get; set; }
}

void Main()
{

    List<Boss> BossList = new List<Boss>()
    {
        new Boss()
        {
            EmpID = 101,
            Name = "Harry",
            Department = "Development",
            Gender = "Male",
            Employees = new List<Person>()
            {
                new Person() {EmpID = 102, Name = "Peter", Department = "Development",Gender = "Male"},
                new Person() {EmpID = 103, Name = "Emma Watson", Department = "Development",Gender = "Female"},

            }
        },
        new Boss()
        {
            EmpID = 104,
            Name = "Raj",
            Department = "Development",
            Gender = "Male",
            Employees = new List<Person>()
                    {
                        new Person() {EmpID = 105, Name = "Kaliya", Department = "Development",Gender = "Male"},
                        new Person() {EmpID = 103, Name = "Emma Watson", Department = "Development",Gender = "Female"},

                    }
        }
    };

    List<Person> result = BossList
    .SelectMany(x =>
        new[] { new Person { Name = x.Name, Department = x.Department, Gender = x.Gender, EmpID = x.EmpID } }
        .Concat(x.Employees))
    .GroupBy(x => x.EmpID) //Group by employee ID
    .Select(g => g.First()) //And select a single instance for each unique employee
    .ToList();

    List<Person> SelectedResult = new List<Person>();

    // AsParallel() - Before Where Clause
    SelectedResult = result.AsParallel().Where(m => m.Name.ToLowerInvariant().Contains("Raj".ToLowerInvariant())).ToList();


    // AsParallel() - After Where Clause
    SelectedResult = result.Where(m => m.Name.ToLowerInvariant().Contains("Raj".ToLowerInvariant())).AsParallel().ToList();
}

Core Source Code:

    List<Person> SelectedResult = new List<Person>();

    // AsParallel() - Before Where Clause
    SelectedResult = result.AsParallel().Where(m => m.Name.ToLowerInvariant().Contains("Raj".ToLowerInvariant())).ToList();


    // AsParallel() - After Where Clause
    SelectedResult = result.Where(m => m.Name.ToLowerInvariant().Contains("Raj".ToLowerInvariant())).AsParallel().ToList();