Alex Gelman has over 20 years of experience as a systems administrator and senior computer scientist for NASA. He has managed hundreds of machines and servers, providing security updates and support to over 150 users. Gelman has received numerous awards for his leadership in deploying, securing and supporting all aspects of systems, policies and networks. He has expertise in a wide range of technologies including Windows, MacOS, Linux, Active Directory, and security practices like encryption and firewall management.