Basically spread yourself thin hoping somebody notices
To be real that is how I moved up quick and got to where I am. It involved a lot of luck admittedly as not all companies or managers appreciate that shyt. Some managers see the go getter and see it as competition and will find ways to keep them down to keep their own spot secure.
Long story short for me, I got a help desk job working the campus computer desks. I'm not even sure how I got that job as I had no previous experience working with computers and was damn near the only one out of over 100 employees not studying something involving computers. We were doing an orientation event where we all would work with one student at a time. I figured out a way to work with three at a time which caught the eye of a director working the event. She had me apply for a promotion to supervisor which I ended up getting.
I used that experience to eventually get a job as software support. Within a year got bumped to assistant manager and in two years manager. That mainly happened due to me going above and beyond by teaching myself SQL, basic networking, and 3rd party software which freed our dev team and IT team up to work on other stuff. Eventually any time we discovered a new department the company was missing they'd have me lead it.
I was lucky as hell though because we were a really small company and the owner of the company was hands on enough to see the extra work I was putting in. He was also a very employee-friendly owner. So he would just give raises out of the blue. He'd give nice ass bonuses. At one point pulled me aside and gave me the talk about how in most companies 10% of the people do 90% of the work. He told me that me and one other guy were that 10% so that's why he always took care of me.
I signed on for 25K, when I went in for my 3 month review he told me I had already been bumped up to 27 and then gave another raise for the three month. By my second full year I had made 54 and within another two years was making 70+. Raises slowed when we were sold to a corporation. Even after selling to the corporation he moved me and the other guy into being product managers directly under him and functioning as our own department.
All of that without any certs, STEM degrees, or any previous experience. Just me grinding lead to me being promoted ahead all of these people with a lot more experience all who were older than me. Add on I was the only minority in the company. Now once we sold to the corporation all that shyt changed. Then it didn't matter how much work you did as it all became about politics and self-promotion. Add in dealing with some racist a$$holes and my career completely stagnated.