It is more difficult now than it would have been a couple years ago and even today it seems that most agents are the same agents that asset managers used during the last housing crises. With that said I did spend some time recently with an asset mgmt company that handles 6K-8K homes across the US at any given time for a couple banks & institutions.
As Steve said they already have a track record of agents that are familiar with their system, reporting, & requirements. But, if for some reason they were picking another agent in a given area - you would need to be a visible presence in the target area.
From what they told me some banks have specific criteria such as the max distance the agent can have their office away from the property. If for some reason they did not already have an agent within that distance you would want to make certain your office was visible (google, maps, local directories, phone book, whatever) should they be looking for an agent to meet the banks criteria.
Of course this is just logic, but you would be amazed how many agents its actually difficult to find.
And as a related issue - if you are an agent - you should be able to Google your name and find your number instantly. I cannot tell you how many times I have to search around and dig just to find a listing agent's phone number. If you do not know how to get your name and number ranked on Google, when people are searching for your specific name and number, PM me and I will show you for free. It is annoying as anything to not be able to find contact info.