project/app/controllers/newcompany.js

import Ember from 'ember';
const { service } = Ember.inject;
export default Ember.Controller.extend({
  session: service('session'),
  sessionAccount: service('session-account'),
  actions: {
    saveCompany: function() {
      'use strict';
      var model = this.get('model');
      var account = this.get('sessionAccount.account');

      model.set('uid', this.get('sessionAccount.account.uid'));

      model.save()
              .then(function() {
                account.set('memberof', model.get('cid'));
              })
            .catch(function(err) {
              console.error(err);
            });
    }
  }
});