One of the most celebrated researchers of Umbrella. He begun his career at the company at the age of 16. He becomes a trainee in the Research Facility headed by Dr. James Marcus. It was during those formative years, that Birkin becomes interested in the "Progenitor" virus. But feels frustrated due to Dr. Marcus refusal to share his own research of the virus. Later on, when the Dr. mysteriously disappears, Birkin takes his place and continues his work. Soon after, the T-virus is revealed and Birkin claims to be it's creator. Suspicion arises as to the validity of his authorship of the virus. A determined Birkin sets out to develop a more powerful virus, to prove to all that he is the best at his craft.