Pre-Fix Order Numbers by User Role

I currently have orders set with the pre-fix "W" for Wholesale orders to differentiate them from Retail orders. However, we have a few different wholesale roles and I would like to be able to differentiate those orders with a pre-fix as well. Is there a way to code a special pre-fix based on user role? The role in particular would be for a wholesale role labeled as employee. Since Employee falls under the Wholesale Role, it is getting the W prefix to their orders. I would like all other wholesale orders to have the W prefix, Employee orders to have an E prefix, and all retail orders to have no prefix (remain as-is).

Here is the snippet that works for wholesale orders to have the W prefix:

add_filter( 'woocommerce_order_number', 'change_woocommerce_order_number' ); function change_woocommerce_order_number( $  order_id ) {       $  prefix = 'W'; //The Prefix      $  order_type = get_post_meta( $  order_id, '_wwpp_order_type',true); //get Wholesale Order Type           if ($  order_type == 'wholesale') {         $  new_order_id = $  prefix . $  order_id;         return $  new_order_id;     }           return $  order_id; }