Mark was introduced the the RR&R by Lee Wolfson and became a member of Lair No. 1 of the RR&R on September 9, 1995. He gave a non-Challenge presentation on his travels to Mali at the Third Quarter 1997 meeting. Mark won the J. Z. Landgraf Prize in 1997 Mass Challenge. He completed his Rascal Challenge at the Fourth Quarter 1998 meeting, at which he presented a program on the history of the condom machine and related items. He is a psychiatrist.