function job_post_types() {
    register_post_type('job', array(
            'rewrite' => array('slug' => 'jobs'),
            'menu_icon' => 'dashicons-id-alt',
            'has_archive' => true,
            'public' => true,
            'publicly_queryable' => true,
            'supports' => array('title', 'editor', 'author', 'excerpt', 'custom-fields'),
            'taxonomies' => array('job_type'), // we have used this from the taxonomies below. Default entry should be ('category', 'post_tag)

            'labels' => array(
            'name' => 'Jobs',
            'add_new_item' => 'Add New Job',
            'edit_item' => 'Edit Job',
            'all_items' => 'All Jobs',
            'singular_name' => 'Job'
            ),
        ));
    }

add_action('init', 'job_post_types');


function job_type_taxonomy(){

    $labels = array(
        'name'              => 'Job Types',
        'singular_name'     => 'Job Type',
        'search_items'      => 'Search Job Types',
        'all_items'         => 'All Job Types',
        'parent_item'       => 'Parent Job Type',
        'parent_item_colon' => 'Parent Job Type:',
        'edit_item'         => 'Edit Job Type',
        'update_item'       => 'Update Job Type',
        'add_new_item'      => 'Add New Job Type',
        'new_item_name'     => 'New Job Type Name',
        'menu_name'         => 'Job Type',
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'job_type' ),
    );

    register_taxonomy( 'job_type', array( 'job' ), $args );
}

    add_action('init', 'job_type_taxonomy');