First go to Appearance > Menus and click Screen Options at the top.
Ensure CSS Classes is ticked.
Next create a Custom Link with the label Search and the URL of just a #
We also need to enter some CSS Classes so in this field, add the following:
icon ion-android-search activate-mobile-search
It will look like this as a result:
2. Hire Us Button
Add a standard link to the menu and we'll add some custom classes to this also:
right button see-through
You can of course call this button anything, it doesn't need to be 'Hire Us'.