A 2nd less expensive bike may be the answer. I am in the process of updating my 30 yo 10 speed so I can commute (only 2.5km though) and then park it outside the supermarket on the way home without worrying. (Was worried about the security of my good bike.)

The environmental and wellbeing angles seem logical. Surely there would be a spare secure vacant spot within your building. Do some investigations and present your company with suggestions. If you have done the homework, they may be more likely to assist. Goodluck.