If you are worried about jobs in the USA after doing an MS, I assure you that you got covered here. Not just in the core civil engineering industry but the relevant sectors like mechanical, computational, transport etc. are all well set in the USA. And I think I don't need to remind you that the best universities for MS in civil engineering are primarily located in the country as well.
For example, UC Berkeley, Illinois at Urbana-Champaign and Carnegie Mellon are the top names for civil engineering MS degrees in the world. The only reason I can see a country like the UK instead of the USA is for a research-based career. Judging by your question, I don’t think that is what you want, instead your major concern is jobs in the USA.
As you said, the USA is a developed country. This means that even if there is a drop in the job market there will be development opportunities. Jobs in engineering fields are constantly in demand because of its usage in everyday operation. Take structural engineering as an example. If there is no need to build a new department at some institute, there will be pre-existing buildings that can be redesigned.
Regarding the actual numbers, in the USA the employment of civil engineers is projected to grow 8% from 2020 to 2030. This data is specifically for civil engineering and not combined sectors in engineering. It is more than enough to grant you jobs after you do a civil engineering MS from the country. The job market and industry in the USA are always growing.
One more reason why I am sure that it is a good decision is because universities like MIT and Stanford. If you can make your way into such universities for civil engineering, a job guarantee will be definitely not just in the USA but anywhere. These two universities are like the top 2 universities globally. Every major ranking organization either put MIT or Stanford on #1 spot, and the other one at #2.
Compared to any other country, the economy of the USA is most significant. Finding a job in civil engineering with a good MS will be very optimal in the country. I suggest you start working on your profile to get into top civil engineering universities there. If you need any help with that, you can ask me. Here we help students to start their masters in abroad countries like the USA, UK, Canada, Australia and more.