07年交的140，是A学校的博后，现在换了好几个学校了，还是博后，做的工作也类似，排期到了，可以交485了吧
-Yes. You need an employment verificattion letter for the I-485 filing from your current employer(either the Dept. Chair, Dean or Human Resources Director) indicating your job tiltle (do not use Post Doc, but use Research Associate or Research Scientist), job duties, salary and say "this position has no definite term and Dr. XXX (your name) has the expectation to be employed continually" in the letter.
