What OpsBloke said was true, 'tis a good way in, but and a big but, expect no more than USD15K as remuneration, these posts tend to be taken by folks who are straight out of, or are still in Uni Avtn Studies positions. Sign up for your C&G either direct in class or remote learning then I would suggest make an application to both:
Jeppesen UK International Trip Planning as an assistant Planner, they are at LGW just south of airport peri. Check
www.jeppesen.com click on International Trip Planning for overview of poss job functions.
or
Universal WX & Avtn. They are US HQ'd the UK base is at STN. Check
www.univ-wea.com.
Both advertise on
www.aviationjobsearch.com. Both of the above have a route into the US, either way it is an easier way in getting a grounding on a US thought process.
Keep us all advised. Cheers