How get list of job types of simple job board plugin from code?

My code to get a list of jobpost is this

 $active_jobs = get_posts( array(
                        'post_type'           => 'jobpost',
                        'post_status'         => array( 'publish', 'pending' ),
                        'ignore_sticky_posts' => 1,
                        'posts_per_page'      => 3
                        ,
                        'author'              => get_current_user_id()
                ) );