After getting reinstated the first time, I messed up my GPA again. It happened for many personal reasons, none of which I know aren't really valid excuses. I was hoping to get reinstated a second time but was just curious as to what the process is the second time.

I know I have to actually prove myself this time through marks, so I went to college and have been getting really good grades, but I feel like my good grades aren't enough. Is there more I should be doing to get reinstated into the engineering faculty again?

Do they even do 2 reinstatements? I'm pretty sure both university and you can find a better use for your time and resources.

I went to college

A blindfolded monkey can get good marks in College. It has nothing to do with University work load.

Best course of action would be to pursue another career.

Once again, talk to your faculty. They know best and have all the right answers. Additionally, it may not be possible for you to be reinstated AGAIN into engineering. You may have a shot at an alternate program i.e. Life Sciences or BTech! Good luck!