$user = $builder->getData();
        $builder->add('agency', 'entity', array(
            'class' => 'StartrackUserBundle:User',
            'query_builder' => function(EntityRepository $er) {
                $qb = $er->createQueryBuilder('u');

                return $qb->select('u, g')
                          ->leftJoin('u.groups', 'g')
                          ->where($qb->expr()->like('g.name', $qb->expr()->literal('%Agency%')))
                          ->andWhere($qb->expr()->not($qb->expr()->eq('g.user_id', $user->getId())));

            },
            'empty_value' => '-',
            'property' => 'name',
            'required' => false
        ));