Immigration as a Computer Engineer

In a scenario where a 31-year-old Computer Engineer with a master’s degree, 4/5 years of work experience and looking for an employer to sponsor him for the H-1B visa to work in the US, how much time on average will he need to find one? And above all, can you find it from abroad? Also, if I'm from a Western European country, would it be possible for me to get the Green Card through EB?