Si Robertson, also known as "Uncle Si," is a retired reed maker for duck calls at Duck Commander and a veteran. He is best known for his role on A&Es Duck Dynasty, on which he has emerged as a breakout cast member. Si retired from the Army in 1993 with the rank of Sergeant First Class (E-7). Since retiring from Duck Commander, Si has been working on his music career with his band, "Si and the Si-cotics," and improving his Texas Hold Em game. He has also written a New York Times bestselling book, Si-Cology 1 and Si-renity. Si is still alive and healthy.