I am going to assume that your IT person is not aware of the licensing restrictions for SketchUp. Once informed they should correctly advise you to purchase the Pro version.
I’ve worked as an IT Administrator and IT Consultant for over twenty years and strongly warn you against violating any operating system or software license agreements. It’s not worth the legal and financial trouble.
As an example, the Pro version of SketchUp will cost you less than two hours of time with a good attorney which you will need to consult should there be an investigation.
Finally, if your (or any) IT professional suggests any such fraudulent behavior, find a new IT professional.