I just put in notice at my current position, which is a lead systems engineer at a small MSP. It's such a difficult thing to do. I'm leaving some good people and some really enjoyable aspects behind. The stress, constant work, and broad, but shallow exposure to technology along with other reasons described in
Are MSP jobs that terrible? led me to seek employment elsewhere. I was also fairly salary limited.
I'm moving into a ~$500M company based here in the Twin Cities as a Senior Systems Engineer. It will be much more project work, and one of the reasons I was hired was actually my interest in getting deeper into security. The team lead and I hit it off in our interviews and we're both very excited for me to start. It was a tough decision, but I think it's the right career move and the best move for my general happiness. My commute gets cut in half and I get ~25% raise, which is pretty enormous at this point, so I'm very excited.