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North America Immigration Law Group (Chen Immigration Law Associates) is a U.S. immigration law firm dedicated to representing corporations, research institutions, and individuals from all 50 U.S. states regarding I-140 immigration petitions. We specialize in employment-based immigration petition and have a proven record of high success rate for the categories of:

We keep close track of the latest immigration trends and regulations of USCIS (U.S. Citizenship and Immigration Services), decisions of AAO (Administrative Appeal Office) and judicial review opinions. The massive collected material contributes to the winning strategies for our clients' cases.

Approval of each case is the goal of our law firm. The key to our success is how we present supporting evidence and the high-quality petition letters based on systematic knowledge and comprehensive database developed by our firm. To provide the best immigration service, North America Immigration Law Group only hires attorneys with J.D. degrees from top law schools.

We have one hundred percent confidence in our capability to successfully represent our clients, and we are the only U.S. immigration law firm with refund policy on I-140 petitions. This is not an empty guarantee but specifically laid out in the attorney-client contract and is binding on our law firm.

We are pleased to announce that North America Immigration Law Group has so far received over 6,000 EB-1A, EB-1B and EB-2 NIW I-140 approval notices. In 2015 and 2016, the approval rate is 97.9% for cases using our Approval or Refund® (money back guarantee) service and 96.9% for all cases.

Our approval rate is 99.6% for NIW petitions using our "Approval or Refund®" (money back guarantee) service and the overall approval rate for all NIW cases is 99.2%.

In terms of EB1A petitions, the approval rate is 96% for cases entitled to our "Approval or Refund®" (money back guarantee) service and the overall approval rate for all EB1A cases is 94.3%.

As one of the leading U.S. immigration law firms providing the most comprehensive services focusing on EB-1/NIW petitions, we are proud to maintain our high approval rates with a large volume of approved cases.

* The number of EB1B approvals is under-estimated because we calculated our approval rates based on the approval notices we received. Some EB-1B petitioning employers did not submit a G-28 so only the employers received the approval notices.

** One denied case was not originally filed by our firm. We took the case after an RFE (Request for Evidence) was issued and the case was denied after the RFE response.

*** Among 125 EB-1A denials, 71 were processed in NSC (Nebraska Service Center) and 54 were processed in TSC (Texas Service Center). The majority of the EB-1A denials processed in NSC were issued by officers who requested thousands of citations for EB-1A approval.

In 2015-2016, our approval rate for O1A I-129 cases is 100%.

Note: These statistics are based on the final adjudication received in the specified year.

Client Testimonial

  • PhD student

    My EB1A got accepted in 14 days from NSC. It is great news for myself and my family. I first contacted them with a big question of "Am I eligible for EB1A?". The answer being YES came as a big surprise. I also received advise to strengthen my application before submission. The Approval or Refund policy gives peace of mind while nervously waiting for the result of the application. All my answers were responded in a timely, professional and complete manner. The petition letter was exceptional; I didn't even know that my research had so much impact. The petition package itself was prepared with utmost accuracy and they made sure that each and every component of petition letter had sufficient documentation. I very strongly recommended WeGreened for anyone applying for EB1A I-140.
  • Asst Research Scientist

    North America Immigration Law Group are professional immigration lawyers and they offered me the "Approval or Refund" service. My EB1A approved in 3 & 3/4 months (around 2 weeks after PP). The attorneys are very professionals and they prepared my I140 application in a wonderful way. They are very confident about my I140 application. During the course of application preparation, they responded all my queries in a professional way and i used to get a response within 24 hrs. I was so happy that i chose Chen immigration for my I140 application. I strongly recommend North America Immigration Law Group to anyone consider the Greencard.
  • SBP
    Staff Scientist

    My first EB1B I-140 got a NOID in 2015 because of our institute's attorney who did a very bad job. I soon realized how important it is to have a good immigration attorney. So, I contacted "North America Immigration Law group " a.k.a Chen associates who are one of the best in this business in 2016. In spite of my first denial, based on my credentials I was given a approve or refund offer. I first filed in the EB1A and got an RFE. The officer handling my case had a history of denying strong candidates on very flimsy grounds . Because of the expertise and professional acumen of Chen Associates, I was advised to refile in the EB1B category. I was very fortunate that my employer agreed and to top it, I was able to retain Chen associates. They honored the agreement and I paid nothing for refiling except the premium processing fee. They did a very thorough and wonderful job. In fact, the international office director complimented me for the excellent petition letter that was drafted by Chen associates. My case was approved approved within 1 week of premium processing request. I will definitely refer my friends to the "North America Immigration Law group".
  • Post-Doctoral Associate

    My EB1A I-140 petition with Premium Processing got approved in 9 days. Thanks so much for their professional and efficient service. I will strongly recommend "North America Immigration Law group".
  • Process Engineer

    My Heartfelt thanks to Chen immigration law group.
    Firstly, when O approached them by e-mail for initial evaluation, I was thinking of applying for EB-2 NIW but after reviewing my CV and Google scholar citations, they told me that I have bright chance to get approval in EB-1A in case if I consider it. I couldn't believe it and told them I don't have enough confidence. After that, they offered me approval or refund if I complete 15 reviews. Their encouragement meant a lot to me and finished reviewing 19 articles in 3 months.
    Their drafting is extraordinary and when I saw my petition letter the first time, I was astonished looking at details I don't know about the impact of my research and ranking in google scholar. Overall, my experience with them was fantastic and impeccable. I already recommended them to four of my friends for EB-1A/EB-2NIW. I will be very much grateful to them forever!
  • University of Washington
    Research Associate

    Thanks to Chen immigration law group for my I-140 approval. It took 13days by PP. I came to know Chen group from one of my friend. Together we prepared Petition letter strong by doing several revisions. Chen group is good at what to keep what to not in petition letter. They created exhibits to petition letter make it strong and easy to understand Immigration Officer.
    My case was proved that "Chen group is good at making I-140 for science back ground people".
    I can recommend Chen group to others.
    Rao (Research Associate)
  • Postdoc

    Got my EB1A I-140 approved in just 10 days after filing the petition (PP). Chen immigration associates were thorough, patient and professional throughout. Very prompt with their responses to all my queries. The petition letter they drafted was well organized with the right balance of science/technical and law/immigration language - something that I could've never written on my own. Very happy and satisfied with the whole process. Highly recommend them. Thank you NAmILG!
  • Cancer Researcher

    I would strongly recommend anyone for filing their I-140 EB1A petition with Chen Immigration Law Associates (North America Immigration Law Group). I found their “free evaluation” of credentials to apply for I-140 EB1A petition very motivating as their success rate is simply the best. Ms. Victoria Chen is highly professional and she has answered all of my queries very promptly from the beginning. After a careful evaluation, they offered me the "Approval or Refund" service which means if my EB1A petition is denied, the attorney fee will be refunded. Working with Chen’s team is equally very smooth. Her team members are also very professional as well as careful and they go through every minute details of my case and respond to the queries within 24 hour. I am extremely happy with the whole process and the importance and care given to draft my petition and other supporting documents. My case is now approved within just 9 working days. Thank you North America Immigration Law Group.
  • Texas A&M University
    Assistant Research Scientist

    People always say it is you that know yourself better than anyone else, when you has such a question whether to choose a lawyer for immigration affairs or not. That's true. But Chen immigration law group knows the immigration affair better than others, to the best of my knowledge. With their excellent professional work, I, as well as my current colleague, and my previous lab mate, succeeded in getting approval of the I140 petition in eb1a. Accordingly, I strongly recommend Chen Immigration Law Group.
  • PhD student

    I am glad to know that my EB-1A I-140 is approved. I strongly recommend anyone for filing their EB-1A petition through, I had a very pleasant experience with them.
  • Associate Research Scientist

    I think Chen immigration is very professional and did a great job in my EB1B-I140 approval (with PP). They are/were very prompt to answer any queries and have an excellent portal to communicate. I found them very honest in initial evaluation of a profile and they are perhaps only law firm to give money back guarantee. The petition/recommendation/experience letters were drafted very efficiently. I highly recommend them to any prospective immigrants who are considering filing an application.
  • Harvard Medical School
    Staff Scientist

    Having never worked with lawyers before in my life, I wasn't sure what to expect. However, from the time I got in touch the first time with Chen Immigration lawyers, I noticed a very professional approach. Before signing the contract, I asked them multiple questions asking details about everything and not only did I receive systemic answers for all my questions (and more clarifications whenever I asked), but also the answers were provided in less than 24 hours. This led me to go ahead and retain their services.
    As pointed out by everybody else, these guys work with highest level of professionalism. However, I must admit - it does feel a little impersonal. You are never addressed by your name, and you never know who is replying to your messages. Having said that, getting your case approved is of the highest priority and of course I will take that above anything else.
    I think there is no reason to go to anyone else for the following reasons:
    - extremely fast turn around time
    - letters actually drafted by the lawyers and not just edited (unlike most other lawers)
    - legal fees about the same as all other lawyers
    - money-back guarantee if offered

    You might get 1 or 2 of these things but not all of them with others. I am VERY happy with this team and will recommend them to all my friends looking for immigration services/advice.

    My EB1b (with PP) got approved in 9 business days.
  • Project Scientist

    My EB-1A petition got approved in 3.5 months (10 days after premium processing). I will strongly recommend chen immigration for handling such cases. They are very professional and will go above and beyond to help your application look strong. From drafting high quality recommendation letters to generating the final petition letter, they provide excellence. I would like to thank North American Immigration Law firm for accepting and filing my case.
  • Postdoc Researcher

    My eb2/niw petition was approved after only 38 days. I would like to strongly recommend anyone for filing their eb1/eb2 petition with we They are professional in their work and their service was very satisfying for me. North American Immigration Law firm has a great track record of success and i strongly recommend this firm for anybody who want to hire a lawyer for his/her immigration case.
  • Medical oncologist/ physician-scientist

    Medical oncologist/ physician-scientist
    My eb1a/I140 petition with PP was approved after 11 calendar days, and within less than 3 months since I retained chenimmigration firm. Ms. Victoria Chen gave me initially an objective assessment of my application and provided me with very helpful guidance as to how to proceed. The team is extremely professional, efficient and knowledgeable. The petition and offer letters were prepared on a timely manner, and accurately described my scientific contributions while highlighting what is deemed to be “extraordinary ability”, which is key for a successful application. The whole application was carefully reviewed and filed to uscis on a timely manner.
    I highly recommend North America Immigration Law Group for eb1a petition.
  • senior scientist in bioanysis

    My EB1B petition with Premium Processing was approved around 10 days. We greened group are supper professionals and give me help in every stage of my application . They answer my questions fast and accurately. Their group are the best!
  • ESX corporation
    Director of Technology

    My EB1B petition with Premium Processing was approved within 10 working days.
    My colleague recommends this great law group to me, since he also got his petition approved smoothly and fast with their service.
    No doubt, this law group is professional, careful on every detail, responsible and patient with every question you have.
    When preparing the petition, they are experienced, high quality and quite fast compared with many other law groups.
    Considering the immigration is one of our most important legal affairs, we should choose the best.
    Based on what I have experienced, Chen Immigrations and Attorneys is the best.
  • Postdoctoral Scholar

    My EB1a petition with premium processing was approved in 9 days! Initially, I had reached out to a handful of law firms with my credentials and the possibility of filing for permanent residency. Ms. Victoria Chen was the most upfront about my qualifications and discussed my case objectively. After retaining their firm, I realized that the Chen Immigration Law Associates is professional, superbly organized, and courteous; they did an excellent job of preparing my case, which included writing five excellent recommendation letter drafts and an extremely convincing petition letter. I am particularly impressed by their secure case management system, and how quickly and efficiently they deal with client questions and meet deadlines.
    I strongly recommend the Chen Immigration Law Associates ( for your I-140 immigration petitions.
  • Post-doctoral Scholar

    I would strongly recommend anyone for filing their EB1A I-140 petition through we They are timely, thoroughly professional and their service is excellent. Moreover, they are extremely careful in the case preparation and filing the application in time. My EB1A is approved without any RPE which is a welcome news. Definitely, we has a great track record of success and i strongly recommend for anyone applying through EB1A category.
  • Postdoctoral Fellow

    I am glad to know that my EB1 I-140 is approved. You made my dream come true. I am very thankful to North America Immigration Law Group. In addition to one's extraordinary credential, it is very important to have very good attorney for this success. Chen immigration attorneys are very brilliant and professional. They are very prompt in replying every query.
    My several friends recommended Chen immigration and indeed they are great. I worked with Ms. Chen and Mr. Ingebritson. They have explained and simplified all process. Their wining strategy of selecting most useful credentials and presentation helped me in success of my case. I am completely satisfied with their service and highly recommending to everyone who is interested in employment-based green card application.
    Thank you very much for all your help and advice during entire process of my application.

Success Stories: EB-1A Petition Approved within 13 days for a North Carolina-based Assistant Professor of Biostatistics

Great, thank you very much! I really appreciate your help in the process. I want to proceed with your company to file I-485 for me and my husband.

Approved in 13 days

State of Residence: North Carolina

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Success Stories: Iranian Environmental Engineering Associate Professor based in Japan with an Approved NIW Is Ready for Immigrant Visa Processing

I would like to thank you again for all your efforts and would be very glad to share my experience of working with you with others...

Approved in 279 days

State of Residence: NA

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Success Stories: EB-1A Petition Approved in 11 Days for Senior Research and Development Engineer in New Jersey in the Field of Computational Engineering (PP Requested)

After having an unsatisfactory experience with another law firm wherein no petition was filed, I decided to hire Victoria Chen and associates to file for my self-petitioned EB1A green card, and I could not be happier about that decision! She is extremely meticulous and detail-oriented, and very prompt at responding to questions/concerns. I was very pleased with the management of my whole case. Every statement in the petition letter had evidence to back it up, making the case stronger and stronger with every iteration. Even though the whole case management from start to finish was electronic, I never felt the need to speak to any of her associates on the phone. Although every case may differ, with her assistance, my application was filed within 4 months. She is highly skilled in her field and comes with my strongest recommendation. Thank you so much for your help!

Approved in 11 days

State of Residence: New Jersey

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Success Stories: Research Associate from China with 108 Citations in the Field of Biological and Chemical Process Systems Engineering Obtains EB-1A Petition Approval

I noticed that my case has been approved. Thanks so much for your effort. That means a lot to me. I have recommended your service to my friends who have the plan to apply their greencard. Thanks again!

Approved in 10 days

State of Residence: Maryland

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Success Stories: EB-1A Petition Approved without RFE for Postdoctoral Researcher in Missouri in the Field of Polymer Chemistry (128 Citations, PP Requested)

Again, I greatly appreciate your professionalism and efficiency for getting my 140 case approved!

Approved in 11 days

State of Residence: Missouri

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Success Stories: EB-1A Petition Approved for Chinese Postdoctoral Research Fellow in Illinois with 151 Citations in the Field of Mechanical Engineering

Thank you very much again for your great help. I'm very willing to share my experience working with you great team and will do that shortly. I will definitely strongly recommend your law team to my friends and my colleagues.

Approved in 267 days

State of Residence: Illinois

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Success Stories: EB-1A Petition Approved in 5 Days for Research Scientist in Maryland in the Field of Electronic Engineering (134 Citations, PP Requested)

Thank you very much for your fantastic and amazing job on my Eb1A I-140 in the past unforgettable four months! The quick response, professional service saved me so much time and calmed me a lot, which have given me such a great impression.

Approved in 5 days

State of Residence: Maryland

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Success Stories: EB-1A Petition Approved for Postdoctoral Researcher in New Jersey in the Field of Molecular Biology (PP Upgrade, No RFE)

Thank you for the confirmation and thanks for all the support and efforts. Really appreciate it!

Approved in 132 days

State of Residence: New Jersey

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Success Stories: EB-1A Petition Approved Without RFE for Postdoctoral Research Associate from China in the Field of Biomedical Engineering (121 Citations)

Thank you so much!

Approved in 9 days

State of Residence: Texas

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Success Stories: EB-1A Petition Approved Without RFE for Biochemistry Research Associate in Massachusetts with 127 Citations

Hi Wegreened, Thanks much for your help! Really appreciate your effort.

Approved in 264 days

State of Residence: Massachusetts

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Success Stories: EB-1A Petition Approved in 10 Days for Optical Engineer from China in the Field of Optical Engineering (148 Citations, PP Requested)

Wegreened attorney is very profession and responsible. The PL and RLs drafted by them are excellent. They did not just saved my time but also enhanced my case by rightly elaborate my work and contribution. The communication between wegreened and me is smooth. My messages or questions were also responded within 24 hours. Really a big help to me on my I-140 petition.

Approved in 10 days

State of Residence: California

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Success Stories: Public Policy Economist in Virginia with 130 Citations Secures EB-1A Petition Approval in 22 Days (No RFE, PP Upgrade)

That is great news. Thank you so much for your help. I really appreciate what you have contributed to the success of my case.

Approved in 22 days

State of Residence: Virginia

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Success Stories: EB-1A Petition Approved for Research Engineer from China in the Field of Electrical Engineering (156 Citations, PP Upgrade)

Thank you so much for confirming the approval status. I am really happy and appreciated!

Approved in 18 days

State of Residence: Michigan

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Success Stories: EB-1A Petition Approved in 14 Days for Chemical Engineering Postdoctoral Scholar from China (PP Requested, No RFE)

Thank you so much for your excellent work on my case. You are really professional and efficient. I'd like to recommend you to my friends in the future.

Approved in 14 days

State of Residence: California

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Success Stories: EB-1A Petition Approved in 8 Days for Postdoctoral Associate in New York in the Field of Neuroscience (135 Citations, PP Requested)

I had a great experience working with the North America Immigration Law Group. They are efficient at preparing the application materials, responsible for the application process, professional and patient at solving all the questions that you have. Because of that, I have recommended the NAILG to my friend for the Greencard application. I am quite confident that they will do a good job.

Approved in 8 days

State of Residence: New York

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