Edgars Sims has a Master’s degree at the Faculty of History and Philosophy, University of Latvia, and is a PhD candidate working on his thesis “The Development of Personal Heraldry in Livonia, 13th–16th Centuries”. Besides heraldic theory E. Sims also deals with practical heraldry — he is the author of the coat of arms of the historical land Sēlija (Selonia), and one of the few heraldic specialists in the country. He is also active in creating coats of arms for municipalities, organisations, and individuals.