Patricia, yes, this model has a left side manual Safety. It is easy to engage/disengage with your thumb without having to change your grip on the pistol. The safety is pictured between the 2nd and 3r rear slide serrations in this picture : google.com/search?q=Ruger+EC9s+Turquoise+Pistol+safety&sxsrf=ACYBGNSaYFDm3HJPm7MNxehgmOtjmSZxCw:1578451545522&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjZwKmd_vLmAhWPY98KHVm9CgAQ_AUoAnoECA0QBA&biw=1280&bih=596#imgrc=CoxmqkX07hHGwM:

Yes, this has a manual thumb safety on the left side of the gun. It is visible in the additional pictures of this model on the Ruger site: ruger.com/products/ec9s/specSheets/13200.html