pmpro-email-data-membership-officer.php

<?php
/**
 * Add membership officer to email data
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_email_data_membership_officer( $data, $email ) {
	$args  = array(
		'role'    => 'imc_membership_officer',
		'orderby' => 'user_nicename',
		'order'   => 'ASC',
	);
	$users = get_users( $args );

	$first_user = reset( $users );
	$display_name = $first_user->display_name;

	$data['membership_officer'] = $display_name;

	return $data;
}
add_filter( 'pmpro_email_data', 'my_pmpro_email_data_membership_officer', 20, 2 );