Considering that you have a Materials Engineering degree from
NTU, you can try yourself in the profession of a welder. I think that in the field in which you work, this will be very popular. It seems that this requires special training, it will be even better if you try yourself as a welding supervisor. You can read more about this profession here
https://weldingnearyou.com/careers/welding-supervisor/, I am sure that you can find online courses for this and not expose yourself to the risks of getting infected during the coronavirus pandemic. My cousin used to do it and got very good money for it .