US Immigration from Greece

Hi all!

I would like to schedule in a while my travel to USA (incuding a 14 day quarantine - second time i will do that...) but this time I want to stay longer of course under 90 days and 180 days per year have not been reached. We have started the K-1 and received NOA 1 few days ago.

My questions are the following:

1- If in general is ok having the ESTA to work for my normal work online as employee of the greek company? My employer is ok with that but not sure if for US is illegal?

2- As my work is online anyway now with covid and actually i will not take many days off how i will prove that i have no intention to stay in US regarding the job part? I can have my work contract, is that enough? (of course will have air train tickets for my return back at home, proofs of relationship etc etc.)

Any advices?

Thank you in advance!

Best

Christine