Andrew Tetzeli, IT Professional, with expertise in: Systems: macOS, Windows, Linux, iOS, Android; System administration; Software; Development; Cybersecurity; Networks, Servers. My Brief Bio: A blend of formal education and self-taught expertise in information technology. Honors graduate of a prestigious American university and law school. Handled complex commercial and banking litigation. Transitioned from a legal career in 1998. Once held roles as executive director, regional director, and gra