Usually it is simple: "Dear Prof. Berret...", Dear Dr. Jones...". But this time I have to write a formal letter to a person with a Masters Degree (MSc). I never met the person, can not be sure about their gender (Tracy Smith could be both man/woman). The person is active in academia, publishing frequently and their job title is "Director". What are my options?
Dear Director of... (with no name)? Dear Principal Investigator ...? Dear Mr Smith? Dear Mrs Smith?