Hi @Dare_to_Dream we do not promote nor mention workshops here on the forum as we want to make sure the content remains unbiased for our members. You are of course free to come up with technical questions as we have a large user base here.
Having said that, there are plenty of car workshops in Abu Dhabi to tailor to modifying your vehicle, but be ready for lots of issues to get your car through the RTA inspection if you are planning heavy modifications (unless you will drive it around on a trailer )
I recommend Google search "4x4 modification" or "4x4 tuning" and go through the list of potential shops. Visit them one by one and look at the projects they've done and try to align with them on budget, plans, execution, designs, etc...
You will probably see that after visiting 10-15 shops that only 1-2 will be shortlisted.
Be very detailed about your expectations and budget. Because the majority of these shops will make you drain your wallet faster than anything !
Good luck !