Dear Aspirant,

Getting a job in US or UK after an M.S is possible but there are many things to be considered before hand such as:

• Research Field you pick in your M.S
• University you join for your M.S
• Country you were about to Relocate
• Companies you seek for your placement
• Your ability to surf online regularly and hitting up the opportunities in right way via career pages of different organisations.

I recently answered a similar question with little more details over here:
https://www.careers360.com/question-after-completion-of-my-ms-in-canada-can-i-go-for-uk-or-usa-for-job

Make sure you have a look over it
All the best