Introduction Recommendations have been issued to prevent workplace-related SARS-CoV-2 outbreaks. To discuss their impact, we assessed non-healthcare workers of a company which implemented such recommendations from early on. . Material and methods We performed molecular and serological tests to SARS-CoV-2 in workers of a Portuguese electrical company, in June 2020. Workers were also subject to an epidemiological survey. . Results A total of 1359 workers (out of 5850) underwent SARS-CoV-2 testing and answered the survey. Twenty-five participants (1.8%) had positive testing results. Conclusions We observed low frequency of SARS-CoV-2 infection in a company that early on implemented policies to decrease COVID-19 risk.