The Windows Authentication Team has 4 Program Managers, 8 developers and 8 testers and works on the core Windows authentication components such as the LSA and is responsible for Windows authentication protocols including Kerberos, SSL, NTLM and Digest. We also have one Architect, Paul Leach, who holds the title of Distinguished Engineer (the highest technical title at Microsoft). Paul has been with the team the longest since the early 90s. We also have other Architects who provide advice on the long term architecture and direction including Butler Lampson (another Distinguished Engineer and Turing award winner). Butler is known for his work on Authentication in Distributed Systems including the seminal http://research.microsoft.com/lampson/45-AuthenticationTheoryAndPractice/WebPage.html
I myself am a Program Manager in the team and have been working on authentication for the last 5 years.