Tim Janzen is a family practice doctor in Portland, Oregon. He has had an interest in genealogical research for over 35 years and has particularly been involved in Mennonite genealogical research for the past 20 years. Tim has a strong interest in many areas of genetic genealogy, particularly in regards to phasing and autosomal DNA analysis. He is a consultant to the genetics company 23andMe as one of their Ancestry Ambassadors. He has given many presentations about genetic genealogy.