Yes, that's perfectly fine. I got my nomination approval just today and I had declared experience my current employer's experience, both in work history and resumé in OINP and work history in Eexpress Entry.
So, effectively, I skipped including experience from last 2 employers although I did mention this fact in an LoE as follows -
"In my Work History and Résumé, I have only included the work experience that I have specified in my Express Entry profile. I am not claiming any points for work experiences with past employers partly to avoid the difficulties in obtaining a detailed reference letter from past employers and partly because these experiences were not required to satisfy the criteria for the FSW program. If these omitted experiences are required for my current application, I am happy to readily provide relevant documentation at my disposal."
Needless to say, you should be able to show at least 3 years of experience and for your chosen NOC code.
Good luck!