Aretxaga is a class-C researcher at the National Institute of Astrophysics, Optics and Electronics (INAOE), Mexico, a member of the Mexican National Researcher System (equivalent to Full Professor), and a member of the Mexican Academy of Sciences (AMC). Since her arrival in Mexico in 1998, she has built her research group on galaxy formation and evolution and contributed to the development of the astronomy community. In 2011–2016 she was Head of Department of Astrophysics at INAOE. In 2006–2013, she coordinated the astronomy section of AMC. Since 2016, she has directed the International Schools for Young Astronomers of the International Astronomical Union, that bring education, development and networking opportunities to graduate students in isolated areas. The main focus of her research is to unravel the importance of massive star formation around supermassive black holes and their role in galaxy formation and evolution. She has coauthored over 140 research papers in Q1 journals, and has been invited more than 100 times to international conferences and other research institutes as a speaker. She also has an active outreach programme of talks, articles and pieces in social media.