No, the subjunctive is 'were' in the 3rd person also.
If I were
If you were
If he/she/it were
So 'If he/she/it were ..., he/she/it would ...' is right.
If he were from the EU, he could easily work in Germany.
(But he isn't, so he can't. The condition isn't true.)
If she weren't _so_ lazy, she could become a doctor.
(But she isn't, so she can't. The condition isn't true.)
You may also hear 'If he/she/it was,' but in a contrary-to-fact sentence, that's actually wrong, or rather, colloquial/spoken, just like in the 1st person.
Of course, there are other sentences with 'if' in the past that are not contrary to fact, but conditional. In that case, the verb in the if-clause is in the indicative, not the subjunctive.
If he was in the Communist party, that might explain why he fled Germany in 1936.
(It's possible, but we don't know. The condition could be true.)
If she was a doctor, she must have known the symptoms of tuberculosis.
(Another way of saying that in fact, she was a doctor, and given that condition, we can make the following assumption. The condition is, as far as we know, true.)
Does that help?