It was really a great experience working with Chen Immigration Group. I got my Ph.D. in Iran in electrical engineering (major of telecommunication). At the time of submitting I-140 petition, I had 14 published journal papers and some conference papers which were cited 56 times based on Google scholar record. During preparation of my summary of contribution and petition letter, the attorney group helped a lot. They acted very carefully with regard to the recommendation letters (I had 2 dependent and 4 independent recommenders). The attorney group always responded to my questions/inquiries very shortly and precisely. I remember that once I sent all of my documents to be submitted to USCIS, they read my package multiple times word by word! and they found some minor corrections which had to be done in my packages! I really recommend the group to those who are seeking for a reliable attorney group.