Load WP Job Manager templates from theme/plugin using hook

load-wpjm-templates-via-hook.php

<?php

add_action( 'job_manager_locate_template', 'my_theme_include_job_manager_templates', 10, 3 );

if (!function_exists('my_theme_include_job_manager_templates')) {
	/**
	 * Include modified job manager templates.
	 *
	 * @param      mixed   $template       The template
	 * @param      string  $template_name  The template name
	 * @param      string  $template_path  The template path
	 *
	 * @return     mixed
	 */
	function my_theme_include_job_manager_templates($template, $template_name, $template_path) {
		// check if the template name is job-submitted.php
		if ($template_name === 'job-submitted.php') {
			/**
			 * here we have the job-submitted.php file here my_theme/job_manager/job-submitted.php,
			 * we can also keep the template file inside a plugin.
			 */
			$template = get_template_directory() . '/job_manager/' . $template_name;
		}

		return $template;
	}
}