Searching workbook by staff member name

Hi all,

I have a portfolio manager document that I have created (attached HERE).

It currently has an automated index and search box where you can search that index of worksheet titles.

I would like to have an additional search box where you can search by the staff member assigned to the worksheet, ie you type in their name and an indexed list filters to the projects that they are leading. The staff member's name exists in cell F4 of each worksheet.

Can anyone help me with a way to search by staff member in F4?

Many thanks,

Matt