Custom Employee Post Type Sort Last Name

I’ve created a custom post type, called Employees. I’m using the post title to hold the employee full name, first and last. I’ve written a custom query to grab the employees, but I need to sort by last name, which is second word in the title (or last). Is that possible?

$args = array(

				'post_type' => 'rma_employees',

				'posts_per_page' => -1,

				'order' => 'ASC',

				'tax_query'	=> array(
					array(
						'taxonomy'	=> 'rma_employee_type',
						'field'		=> 'slug',
						'terms'		=> 'manager',
						'operator'  => 'NOT IN'
					),
				)

			);

			$loop = new WP_Query($args );