Marcos Ros Sempere (pronounced [ˈmaɾkos ˈros semˈpeɾe]; born on 24 March 1974), is a Spanish politician, professor and architect, current Member of the European Parliament for the Group of the Progressive Alliance of Socialists and Democrats.

He had, among others, the work of Architect-Director of the Management Office for Housing and Rehabilitation of Cartagena, dependent on the Autonomous Community of the Region of Murcia, and Architect-Coordinator of the Comprehensive Facade Plan of the Casco Antiguo municipal company of Cartagena,[4] for which he won a prize in the XVIII Convocation of the Architecture Awards of the Region of Murcia in 2015.

[5][6] Affiliated with the Spanish Socialist Workers Party, between 2003 and 2011, Rose Sempere was a councilor of the Murcia City Council.

[3] Since 2008 he has worked as a professor at the Polytechnic University of Cartagena,[4] which he had been a deputy director of the Higher Technical School of Architecture and Building between January 2015 and February 2016, obtaining another joint award for the project Arquitectura On, in the same call for the Architecture Prize.

[9] The appointment of Josep Borrell as High Representative for Foreign Policy of the European Union and the consequent resignation from the post of parliamentarian, together with the new structure of parliament after Brexit, where Spain obtains five extra seats,[10] leads to his appointment as an MEP with effect on 1 February 2020.