Please visit our Online Memorial and Guestbook Siegfried F. Dankenbring - On January 17, 2010 of Centre Island, N.Y. Beloved husband of 50 years of Betty. Cherished father of Heidi Gross Heinrich. Loving grandfather of Alexander, Nicholas, and Christina. He had a distinguished career as a Professional International engineer. He was the Building Inspector for Bayville and Centre Island. He also worked for the Syosset School District as the Superintendent of Building and Grounds. Funeral Information Visiting Wednesday 2-4 7- 9 p.m. A Funeral Service will be held Wednesday evening A private Cremation will be held Thursday.