I’d be thrilled to join a team; I work as a senior developer (web and mobile apps) but unfortunately have no CTF or “real” cybersecurity experience. I have a deep interest in space and relevant technologies. Would such a skillset be useful?
A full weekend around May, per year.
Of course if you really want to make sure your team can go to the final event you may want to practice on past challenges, which could be done at your own pace (or just don't, you may still make meaningful contributions to a team as long as you can learn new shit really fast).
the comp is only one weekend, but most people participate in a few smaller ctfs throughout the year to stay sharp.
there are hundreds of ctfs that are always up that you can use to practice. one evening a week is more than enough to become and stay a serious ctf'r. it's a whole sport where people are constantly playing throughout the year. we have plenty of people on our team who put in both more and less time than that too.