Pros
Opportunity to work in a Global Company, with offices and business units all over the world. Not only a learning experience from the Telecommunication perspective, but also from marketing and products.
Cons
It will always privilege Spanish people for major and higher positions and roles before giving them than local people, even though the position may not be in Spain (company headquarters). So, not necessarily competences and results are taken into consideration when promoting or recognizing someone. Be prepared to be very political if you want to achieve professional growth within the group. If you don't have a great relationship with influential people, you will most likely never grow. Due to its size and age, there are plenty of protocols, systems, bureaucracies to follow before having anything done. You have to be very patient and anticipate plenty exchange of emails, meetings and phone call before getting anything done.