Was, not is. The board was dissolved almost a year ago and she resigned from it over a year ago. Also "who" not "which", unless your intent is to demean and dehumanize the person you don't usually refer to other people with "which" in a context like this, "who was the head" would be the correct phrasing.
Was, not is. The board was dissolved almost a year ago and she resigned from it over a year ago. Also "who" not "which", unless your intent is to demean and dehumanize the person you don't usually refer to other people with "which" in a context like this, "who was the head" would be the correct phrasing.