Sergio Guillén

Sergio Guillén - Writer & Translator at AirAdvisor

Job/Position: Writer & Translator

Spain

Sergio Guillén is a Senior Creative Translator and Transcreator (English to Spanish, Spain) with 19 years of experience in localization, bridging creative copywriting and technical precision. A native Spanish speaker with an engineering, marketing, and finance background, he has lived in Spain, Denmark, the UK, and Finland, which gives him a strong command of cultural nuance.

About Sergio Guillén

Work Experience

Since November 2016, Sergio has been CEO and Senior Transcreator at Accelingo S.L., where he leads the localization and creative adaptation of global marketing campaigns for the Spanish market. He also performs linguistic audits of AI-generated content and develops Spain-specific style guides and glossaries. Since 2022, he has been Senior Spanish Localization Specialist at Sofascore, managing the Spanish localization strategy for one of the world's largest sports data platforms, with content adapted for users in Spain and Latin America. From 2007 to 2016, he worked as Project Manager and Linguist at Translations Lisko Oy, managing multi-language localization projects for B2B and B2C clients across Europe. His sectors include SaaS and tech, health and wellness, travel and lifestyle, fintech, and e-commerce.

Education

Master of Engineering (M.Eng.) in Product Design, Technical University of Denmark (DTU); Bachelor of Engineering (B.Eng.) in Product Design, University of Valladolid, Spain; university-level coursework in Marketing and Finance.

Passion

Sergio is passionate about adapting content so that it reads naturally to Spanish audiences, following RAE conventions and the vosotros register used in Spain.

Courses and Certifications

Google Ads Certified (PPC); HubSpot Certified (Content & Inbound Marketing).