Add Adsense code between job listings – wp job manager plugin

There’s a filter for the output

    $job_listings_output = apply_filters( 'job_manager_job_listings_output', ob_get_clean() );

so, you should just do

add_filter('job_manager_job_listings_output','my_job_manager_job_listings_output');
function my_job_manager_job_listings_output($output) {
   $adsense_code=" My adsense code";
   return $output . $adsence_code;
}