I have installed, configured, supported, and upgraded countless instances of Ubuntu (Based on Debian) server, Windows Server, 10, 11, various Linux desktop distros, and have general Mac experience as well. I have worked extensively with user/group permission in the past, and will be able to provide you with a solution that maximizes security while also still permitting the applications and users to perform their required functions. I have worked with various enterprise environments, such as at Raytheon, where I was the administrator of corporate tax applications for users around 2000-3000. I have also done ERP system integrations between various systems, which included FTP / SMB / NAS / SAN / NFS devices/protocols.