CIASEM is the organizer of the Interamerican Congresses on Microscopy, which are held every two years.

Previous Interamerican Congresses on Microscopy. They are listed below.

Past Congresses:

• Primer Congreso Atlántico de Microscopia Electrónica (Mérida, 1991) Although held under a different name, this meeting is recognised as the first Interamerican Congress and was where CIASEM was established.
• II Interamerican Electron Microscopy Congress (Mexico, Cancún, 1993)
• III Interamerican Electron Microscopy Congress (Brasil, Caxambú, 1995)
• IV Interamerican Electron Microscopy Congress (Ecuador, Guayaquil, September 23-26, 1997)
• V Interamerican Electron Microscopy Congress (Venezuala, Isla Margarita, October 24-28, 1999)
• VI Interamerican Electron Microscopy Congress (Mexico, Veracruz, October 7-11, 2001)
• VII Interamerican Electron Microscopy Congress (USA, San Antonio, August 3-7, 2003)
• VIII Interamerican Congress of Electron Microscopy (Cuba, Havana, September 25-30, 2005)
• IX Interamerican Congress of Electron Microscopy (Peru, Cuzco, September 23-28,2007)
• X Interamerican Congress of Electron Microscopy (Rosario, October 25-28, 2009)
• XI Interamerican Congress of Electron Microscopy (Mexico, Mérida, September 24-29,2011)
• XII Interamerican Congress of Microscopy (Columbia, Cartagena de Indias, September 24-28, 2013)
• Thirteenth Interamerican Congress of Microscopy (Venezuala, Isla Margarita, September 18-23, 2015)
• XIV Interamerican Congress of Microscopy (Varadero, Cuba, September 25-29 2017)
• XV Interamerican Congress of Microscopy (Buenos Aires, Argentina, October 1-4 2019)
• XVI Ciasem Congress (Oaxaca Mexico, 25-28 October 2022)
• XVII Ciasem Congress, (Olinda, Pernambuca, 7-10 November 2023)
• XVIII Ciasen Congres,  (Salk Lake City, UTAH, July 27-31 July 2025)