The Graduate Program in Structural Engeneering at the Universidad Autónoma Metropolitana – Azcapotzalco in Mexico organized the 4º International Symposium in Structural Engieering on January 26 and 27, 2023. Professor Astroza gave the opening Plenary Lecture entitled “Structural Helath Monitoring: Operational and Extreme Loads“. Professor Astroza also gave a short course on January 26, 2023 about Calibration of Dynamic Models.