Dr. Obeso holds extensive clinical expertise in Video Assisted Thoracic Surgery. In November 2014, Dr. Obeso performed the world's first nonintubated uniportal thoracoscopic sympathectomy in the context of a fast-track program. Dr. Obeso frequently contributes as a reviewer on more than 10 international peer-reviewed journals and has authored important articles and book chapters. Among his greatest achievements, Dr. Obeso discovered and described a new radiological sign "Earth-Heart Sign", which was published in the prestigious medical journal The Lancet. In 2015, The European Journal of Cardiothoracic Surgery published his description about a new surgical technique for pulmonary artery reconstruction. Dr. Obeso is interested in surgical innovation and development of new minimally invasive techniques and hybrid procedures, especially, in the management of Lung Cancer.