function.php

if ( ! function_exists( 'get_the_company_job_listing' ) ) {
    function get_the_company_job_listing( $post = null ) {
         if( ! is_object( $post ) ) {
            $post = get_post( $post );
        }

        return get_posts( array( 
            'post_type' => 'job_listing', 
            'meta_key' => '_company_id', 
            'meta_value' => $post->ID,  
            'posts_per_page'    => 10, 
            'paging' => true 
        ) );
    }
}