Send email when you edit a field in Cakephp

I have employee application where users standing can be resigned, active, new and transferred. What i would like to achieve is that when the standing of an employee is changed/edited from active (standing_id = 1) it should be able to send through an email but its not. I have put a email function in the EmployeeController. Below is my code.

    function _sendNewEmployeeEditMail($id) {
    $Employee = $this->Employee->read(null,$id);
    $email = new CakeEmail();
    $email->from(array('no-reply@test.com' => 'Testing App'));
    $email->to(array('xxxxxx@gmail.com' => 'Name Surname'));
    $email->subject('New Employee');
    $email->template('employee_email');
    $email->viewVars(compact('Employee'));
    $email->emailFormat('html');
    $_sendNewEmployeeEditMail = true;   
    $current_status = $this->Employee->field('standing_id');
    if($current_status==1) {
    $_sendNewEmployeeEditMail = false;
    }
    }

and in my edit save function here is how i am trying to send the email

    public function edit($id = null) {
    $this->Employee->id = $id;
    if (!$this->Employee->exists()) {
    throw new NotFoundException(__('Invalid employee'));
    }
    if ($this->request->is('post') || $this->request->is('put')) {
    if ($this->Employee->save($this->request->data)) {
    $this->Session->setFlash(__('The employee has been saved'),'default',array('class' => 'notification'));
    $this->_sendNewEmployeeEditMail($this->Employee->getLastInsertID()  );
    $this->redirect(array('action' => 'index'));
    } else {
    $this->Session->setFlash(__('The employee could not be saved. Please, try again.'),'default',array('class' => 'error'));
    }
    } else {
    $this->request->data = $this->Employee->read(null, $id);
    }
    $standings = $this->Employee->Standing->find('list');
    $this->set(compact('standings'));

If anyone could help me out on this, that would be awesome

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