Both cards are valid unless withdrawal of first EAD is acknowledged by the USCIS. As EAD is not a status, the "last action" rule does not apply.

Can I switch my employer after getting EAD and I-140 approved but I-485 still in process?

If you change employers your I-485 can still be approved your I-485 has been pending for at least 180 days, the new job is in the same/similar...

Can I go from H1B to H4 and back to H1B? Not planning to leave the US during this time?

An H1B petition can be filed by a prospective employer in the future. You would need to wait until USCIS approval with change of status to be...

Green card question?

A translated document does not expire. It can be submitted again.

TN visa job terminated, grace period?

The 60 day grace period applies unless the TN visa (assuming you obtained TN status through entry to the U.S. versus change or extension of status...

Are H1-B workers on valid 1-year extension still eligible for H1-B transfer after 6-year expiry?

If PERM or I-140 by Employer B will have been filed at least one year prior to July 2019, H1B extension can be filed by Employer B.

Can I file I-140 concurrently with I-485 and EAD Forms as an EB-1 Extraordinary Ability Applicant from Israel these days?

I-485 will be denied if I-140 is denied. Since I-140 can be filed through premium processing, it may be prudent to wait to file I-485 until after...

If the USCIS applies additional scrutiny to this case, the filing may need to be amended with substantial documentation showing good faith marriage...

Will a pending cap-subject H1B case with RFE request affect my approved cap-exempt H1B?

If you were not reliant on cap gap and F1 OPT guidelines were followed (you started working for the new employer prior to H1B approval granting...

Generally the H1B visa category would be recommended, requiring the equivalent of a four-year U.S. bachelor's degree. Employment experience can...