1. A secured mobile maintenance and operator system comprising: a head mounting device (HMD) comprising a plurality of components wherein said components comprise: a microphone; an image capture system oriented towards a user field of view (FOV); a HMD visual interface comprising a transparent section positioned over said user FOV and a visual interface system configured to display a plurality of visual elements including a graphical user interface onto said transparent section; a processing section including a plurality of machine readable processing instructions operable to operate said plurality of components and a command input interface using one or more user command inputs (CI) comprising voice inputs or motion/gesture input recognition; a first transceiver and input/output interface configured to communicate with a second transceiver system; a secure user authentication system (SUAS) configured to receive user access requests as one of said voice or gesture inputs; a machine vision and pattern recognition systems configured to visually identify a system or subsystem of interest (SSoI) in said FOV; and an augmented reality (AR) control section operable to generate a configuration interface display configured for displaying at least one 3D model of the SSoI on the HMD visual interface, orienting the 3D model to align and scale over the SSoI in said FOV on said transparent section based on orientation, position, distance, and perspective of said transparent section in relation to said SSoI, obtaining a plurality of SSoI data through said transceiver and input/output section from a remote server comprising SSoI configuration data, displaying one or more of the SSoI data in relation to the 3D model on the HMD visual interface, orienting the SSoI data to align with over top of or next to components of the SSoI displayed on the transparent section of the HMD visual interface; wherein one or more of said processing instructions comprise machine readable instructions to execute a change of a configuration setting of a selected SSoI based on one or more said voice inputs or motion/gesture inputs associated with selection and changing one or more configuration settings of a selected said SSoI displayed in said HMD visual interface; wherein one or more of said processing instructions comprise machine readable instructions to execute a change of the HMD visual interface to display one or more said SSoI data based on user's selection.