Abstract Background In this study, it was aimed to determine the sleep quality of the employees at the head office of a company and providing information about sleep health and sleep hygiene to people who had poor sleep quality to evaluate the effect of this intervention on sleep quality. Methods The research was carried out in two stages as descriptive and intervention and data were collected under observation in October 2016 and March-April 2017 and information was given in February 2017 in Ankara. Data were collected from 160 of 408 participants who had bad sleep quality and/or sleepiness formed the intervention group. Results In this study 58.8% of the participants were male and 74.0% were married. 46.3% of the participants stated that they slept for seven hours or more. It was determined that 36.8% had bad sleep quality and 15.3% had sleepiness. Those who had non communicable disease (p:0,025) and those who indicate that they have sleep problems with the light in the room while sleeping significantly had worse sleep quality. It was found that participants who had bad sleep quality also had higher sleepiness rate (p < 0,001). According to the logistic regression analysis, sleep quality of the participants who had problems in the last month was worse than who had not problems (OR = 2.34, 95%CI = [1,11-4,95]) and who have children under the age of five was worse than who did not have child (OR = 2.27, 95%CI = [1,04-4,99]). Before intervantion, Pittsburg Sleep Ouality Index point average of all participants was 7,6±2,4, after intervantion it was 6,1±2,9 (p < 0,001). While significancy continues for whom attended to the information conference and got at least an e-mail, for people who could not attend to any intervantion, the change of point become unsignificant. Conclusions Evaluation of the effects of the intervention revealed that it would be beneficial to incorporate topics on sleep health and sleep hygiene in the mandatory occupational health education in the workplace. Key messages At the beginning of the study 36.8% of participants had bad sleep quality and and 15.3% participants had sleepiness. After intervantion Pittsburg Sleep Quality index point average of whom attended to the information conference and got at least an e-mail positively affected.