During June 11–15, Universidad Nacional Autonoma de Mexico (UNAM) hosted the 2018 NDACC-IRWG & TCCON Annual Meeting at the Hotel Hacienda Cocoyoc in Cuautla, Mexico. The Total Carbon Column Observing Network (TCCON) is a Cooperaint Network with NDACC, and works closely with NDACC Infrared Working Group (IRWG). With 63 participants representing 14 different countries, this successful meeting concluded with an excursion which included a visit to the Altzomoni Atmospheric Observatory. Information and photographs can be consulted at https://sites.google.com/site/irwgtccon2018/.