Since 1973 Rogelio Pérez Barja works as a consultant engineer, being part of the Industrial Engineers' Offical
Association from Madrid (COIIM).
He has endorsed 2,757 visa documents in the COIIM since its file has been computerized (January 2000-June 2013).
On the following link you can see the COIIM certificate where it is credited his experience. Including a list of this main works visas for these thirteen years.