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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 7,500 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. Some of the cases were approved after appeal, motions, or re-filing.

Client Testimonial

  • I am a PhD student at Texas A&M University in Mechanical Engineering. Undoubtedly without your help, it was not possible to get my application approved within only 3.5 months. Indeed, I cannot be more satisfied with your service. Thank you for such an amazing support.
  • Ohio State University
    Post doctoral Researcher

    Thank you for your excellent services in the preparation of I-140 in EB1-A category which I obtained without any REFs.
  • Washington University in St. Louis
    Post-doc

    I would like to thank Chen Associates for their great help to get the approval for my I-140 petition. I have extremely satisfied with their service. They response to my questions not only about 140 petition but also for my other visa problems very quickly and are so profession about how to present my case to get it approved. I have my EB-1A petition approved in NSC in 7 days with premium processing.I have retained them for the 485 service.
    I highly recommend to any other people who is considering to file an 140 with the help of lawyers.
  • PhD Environmental Eng.

    I would like to thank Chen Associates for their great help to get the approval for my I-140 petition. I had very pleasant experince working with them and I am highly satisfied with their work.They are very professional and have many experiences on preparing the documents for the immigrant petition. They know about the strength of your case and I receive the I-140 approval notice (NIW) just after 3 months. I also retained them for the I-485 service. I highly recommend your firm to scientists and research scholars. This is one of the best choices in my life.

  • Stanford University
    Research Associate

    I am very happy with the service provided by Chen Immigration team. I retained them for both my NIW and EB1A case. The NIW was approved earlier this year and EB1A was just approved in only 9 days with premium processing. It’s a long process and since the beginning they have been prompt in answering my questions, giving sound legal advice and meticulous in reviewing all the materials. I couldn’t have done it without them. I will enlist their help to file the 485. I would recommend their service to my friends and colleagues.
  • Biomedical Engineer

    I am extremely satisfied with Chen Immigration Team’s service and I highly recommend them to other researchers. They have a quick response time. They knew the strength of the case and presented it an effective manner so that a non-researcher can easily understand.
  • M.S. Field Applications Scientist

    I would like to thank Chen Immigration Law Firm. Throughout the entire process, they were prompt and professional with their answers to my questions related not only to my I-140 petition but also regarding other visa questions I had that had an indirect effect on my petition. Additionally, they were meticulous in reviewing any documents I submitted. I am currently using them to also file my I-485, and would recommend them to any one.
  • Postdoctoral Scholar/Materials Science

    What a thrilling news, my I-140 under EB1A category got approved in just 10 days and without any RFEs. Amazing service by Chen Attorney and co-workers. They deserve my highest recommendations to researcher looking for the best attorneys for their green card. Chen and associates did not leave any stone unturned to make my case stronger. Their way of case preparation and resolving queries as their utmost priority make clients confident at every single step they proceed. They guide me diligently throughout the case preparation and had clear perceptions on what accolades should be included in my case. I was quite sure/confident for my I-140 approval even before filing; Kudos to North America Immigration Law Group for this fantabulous job.

    Retaining Chen Immigration and Attorneys is best decision I could take for my career endeavors. That said, I'm going to retain them for my I-485 as well :)
  • University in Greensboro, NC
    Post Doctoral Research Associate

    Your service was very excellent and professional. You answered all my concerns throughout the process and helped me build a very strong case and have it approved in just 2 months. You're worth the money. And I'll recommend you to all my friends and colleagues.
  • Radar Communication Engineering
    Research Assistant


    I would like to thank Chen Immigration Law Firm, especially Victoria and Mary for their great help to approve my NIW I140 approval within such a short period of time. They were very professional for answering my all questions within 24 hours. Their online portal management system is phenomenal. They helped me in preparation of my petition letter, recommendation letters and arranging my documents in a very systematic manner. From the time I first communicated with them, I instantly felt that they are detailed oriented and delicate to help my case successful. I had very pleasant experience working with them and I am highly satisfied with their work. I would refer anyone to them those who plan to apply for NIW green card.
  • General Motors
    CAE Engineer

    Thank you for your excellent service and legal advice that helped with my case's quick and smooth approval. Without your help, I would have never realized my strength and thought of even filing NIW, not to mention EB1-A. I've never worked with an immigration law firm before and the entire experience working with Victoria Chen's team was a totally positive one.

    A BIG thank-you to your team.
  • EB1A I140 approved with premium processing without RFEs. Exceptional service, quick responses, always on top of things. Great work Chen team, very satisfied and will definitely recommend you to others. Great bang for the buck.
  • Michigan Medicine
    Research analyst , Ph.D.

    Many thanks to Chen Attorney team! They are very professional and have many experiences on preparing the documents for the immigrant petition. I was not confident if my case was strong enough to get the approval. (PhD, 8 published papers,1 first author, 82 citations). However, Chen Attorney team was able to make my case strong and it took about 13 months to receive the I-140 approval notice (NIW). They even provide the I485 DIY package if you retain them for the I-140 service. I used that package was able to submit my I-485 application within 1 week. I strongly recommend this law firm if you want to apply for the green card. This is one of the best choices in my life.
  • Michigan Medicine
    Research analyst , Ph.D.

    Many thanks to Chen Attorney team! They are very professional and have many experiences on preparing the documents for the immigrant petition. I was not confident if my case was strong enough to get the approval. (PhD, 8 published papers,1 first author, 82 citations). However, Chen Attorney team was able to make my case strong and it took about 13 months to receive the I-140 approval notice (NIW). They even provide the I485 DIY package if you retain them for the I-140 service. I used that package was able to submit my I-485 application within 1 week. I strongly recommend this law firm if you want to apply for the green card. This is one of the best choices in my life.
  • California State University Fullerton
    Associate Professor

    I would like to thank Chen Associates for their great help to approve my EB1B I 140 approval. They were very professional for answering my all questions within 24 hours. Their online portal managent system is amazing. They helped me in preparation of my petition letter, recommendation letters and arranging my documents in a very systematic manner. I had very pleasant experince working with them and I am highly satisfied with their work. I would refer anyone to them those who plan to apply for EB1 green card.
  • I want to offer my thanks to the Chen Attorney team for preparation of my EB1A packet. I was very impressed with their overall service and professionalism: First, the quality and attention to detail is phenomenal. They pay attention to seemingly minor details and go the extra mile to strengthen the case. Second, the speed of response is truly phenomenal again. Third, the online portal for managing documents is a very good system. Tracking the various versions of the documents was streamlined. Overall great experience working with them. I always felt they had my best interests in mind.
  • I really want to thank Chen Immigration & Attorneys Group for their help with the preparation of my EB1A case. They did a great job in this whole process. First of all, they are very responsive to my questions and stick to the timeline they promised. Whenever I left them a message, I can always get a response within 24 hours during the weekdays. They completed the drafting of reference letters and petition letter within 10 business days respectively without any delay, just as they promised. Secondly, they provided very helpful and concrete template as well as the most relevant example to my case to collect the necessary information regarding my research experience. As far as I know, this is not a service that every law group is able to provide. According to some of my friends, some attorneys just give their clients a 1-page synopsis with several bullet points, which makes it very hard for the clients to start with. In comparison, the template provided by Chen Group was so concrete that writing the summary of my contributions is as easy as filling the blanks for me. Thirdly, after receiving my summary of contributions, the Chen Group take all the responsibilities to draft all the documents. Whenever there is something that needs to be modified, the Chen Group always takes an active role in revising and editing the documents until I am satisfied instead of asking me to revise again and again until they are satisfied. This is the most pleasant experience I have with Chen Group, because this suggests they work diligently and try their best to save the time and trouble for their clients. In summary, I really think the Chen Group provided immigration legal service with very high quality and it is a very pleasant experience working with them. I will highly recommend Chen Group to my friends who need this service.
  • Thank you, Chen group for helping with my EB-1 petition. The group of attorneys that worked with me were extremely professional, diligent, stuck meticulously to the timeline, were forthcoming with information (including the strengths and weaknesses of my case) and overall did a great job preparing my case. I was specifically satisfied with the intense review process of the petition letter, where we can suggest changes and actively participate. They looked into each of my comments carefully and either agreed to the change or explained to me why that should remain as such.

    As long as we are prompt and spend the time and effort to work on the template, we can be assured of an excellent package that will be put together by Chen group of attorneys. They are also extremely responsive to messages left on their portal and very quick in their review and editing of petition letters once the first draft has been prepared. Will be very happy to recommend the group to other potential clients.
  • Research Fellow

    I would like to thank Dr. Victoria Chen and her immigration Law team for their constant support and highly professional work throughout my case preparation. My case was approved 13 days after RFE from TSC immigration officers. When I first contacted Wegreened Immigration Law Group, they directly offer me the "approved or refund" service. When I filed I-140 case, my google scholar profile gains 253 citations in total, and published over 60 papers in journals and conferences, and total numbers of reviews reached 67. The major topic I announced was Optical Physics. With meticulous case preparation and highly professional work by Dr. Chen and his team, my EB-1A got approved within 13 days after RFE under the category of premium processing. I am fully satisfied with services and highly recommend it to the potential aspirants. I am sure more friends of mine will hear about my success cooperation with Chen Immigration Law Group, and they will also be confident to file their cases with the assistance of Dr. Chen and her team members.
  • Postdoctoral Research Scholar

    My I-140 application was approved recently under regular processing after a wait of ~325 days at the NSC. I greatly appreciate the work of Chen Immigration as they ensured my case was handled meticulously. I think the most important tool that they provided me was the template to which I was supposed to stick to while describing my research. Until recently I was quite nervous because of the spike in RFEs at the NSC, especially under premium processing. I stuck to the regular processing, and and I was pleasantly surprised that my case was approved relatively faster than most other profiles I could track on www.trackitt.com. In addition to an element of luck, I owe this largely to the strong case that Chen Immigration have built around my profile. I highly recommend their service, and I am fortunate having you prepare my case.

Success Stories: A Massachusetts-based Iranian Postdoctoral Associate Specializing in Space Physics Obtained NIW Petition Approval (With 31 Citations)

Excellent! I would like to thank you for handling my I-140 petition. Regardless of the outcome of my petition, this has been the best experience I have had with an organization/firm as a customer. The level of professionalism is impressive.

Approved in 238 days

State of Residence: Massachusetts

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Success Stories: A Chinese Information and Communications Specialist with 75 citations Received NIW Petition Approval 11 months after filing

Thanks for your support.

Approved in 333 days

State of Residence: NA

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Success Stories: A Postdoctoral Researcher from India who Benefits from the Rules of Cross Chargeability Received NIW Approval Based on Matter of Dhanasar

Thank you very much for all your help, guidance and patience. My application would not have been approved without your legal assistance. I have nothing but high praise for you guys. Fantastic job!

Approved in 343 days

State of Residence: California

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Success Stories: NIW Petition Approved (based on the Matter of Dhanasar) for Iranian Ph.D. Candidate/Graduate Research Assistant in the Field of Electrical Engineering

That is a great news. Thanks for your help through the process. I really appreciate it.

Approved in 364 days

State of Residence: California

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Success Stories: NIW Petition Approved for Postdoctoral Research Associate from Sri Lanka in the Field of Inorganic and Organometallic Chemistry (based on Matter of Dhanasar)

I'm very thrilled to inform that I received my I140 approval through mail yesterday and would like to thank you all for your support.

Approved in 170 days

State of Residence: Tennessee

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Success Stories: Associate Professor Based in Pakistan is Ready for Immigrant Visa Processing Now That He Has an Approved NIW Petition

This is great news. I would like to express my sincere thanks for your efforts in this regard. I am very impressed by the extremely professional manner my case was handled right from the start. Interacting with your team of highly competent professionals was indeed a rewarding experience.

Approved in 168 days

State of Residence: NA

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Success Stories: Iranian Medical Image Processing Expert Received NIW Petition Approval and Is Now Ready for Immigration Visa Processing

Your support is highly appreciated, it was a great news.

Approved in 333 days

State of Residence: N/A

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Success Stories: NIW Petition Approved for Postdoctoral Fellow in Virginia in the Field of Virology (50 Citations, 4 Publications)

Great news! I received the approval notice for my I-140 application this weekend. Thank you very much for all!

Approved in 145 days

State of Residence: Virginia

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Success Stories: In Just 5 days, Nebraska Service Center (NSC) Approved the EB-1A Petition of an Indian Pharmacogenomics Research Specialist

Thanks so much for all your help. You are the best.

Approved in 5 days

State of Residence: Illinois

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Success Stories: Roughly 2.5 Months after Filing, EB-1A Petition Approved for A Texas-based Postdoctoral Researcher in the Field of Medical Imaging

Thanks a lot for your great service. I am very happy with the great news.

Approved in 76 days

State of Residence: Texas

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Success Stories: EB-1A Petition Approved Despite RFE for Postdoctoral Fellow in California in the Field of Genomics

I am very glad to find that my I-140 was approved by USCIS. I would like to express my appreciation to your professional services for my case.

Approved in 119 days

State of Residence: California

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Success Stories: EB-1A Petition Approved in 7 Days for Senior Scientist in California in the Field of Nanomaterials Science (PP Requested)

Today we noticed that our case was approved! We are very excited...

Approved in 7 days

State of Residence: California

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Success Stories: EB-1A Petition Approved in a Week for Chinese Postdoctoral Associate in Rhode Island in the Field of Physical Chemistry

It has been a great experience working with your firm. With the deep understand of the requirements for various kinds of immigration visas from your group, the assessment of the eligibilities of the candidates was very precise and sufficient. Your professional strategy for my case was particularly effective and helpful to make my work comprehensive to everyone. All my questions were answered within one day, and I appreciated your patience to help and support me even with couple of my individual problems. Working as a postdoc, I didn\'t really have time to prepare and optimize my petition, all the materials was very well prepared, customized and assembled in a way that my contributions was highlighted and clear to the immigration officer. I can tell the great effort and work you have put in for my case. Thank you so much!! I would love to recommend to everyone who will need professional assistance for immigration visa!

Approved in 7 days

State of Residence: Rhode Island

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Success Stories: EB-1A Petition Approved Despite RFE for Research Specialist from India in the Field of Biochemistry

I would like to thank highly talented professional North America Immigration Law Group team for their extraordinary work to make it possible. Thank you very much for your help during the process of I-140. I highly recommend their services for green card process. They are really prompt in answering questions or drafting letters/petitions.

Approved in 98 days

State of Residence: New Jersey

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Success Stories: Despite an RFE, a Postdoctoral Research Fellow in Oklahoma in the Field of Neurophysiology Attained EB-1A Petition Approval

That would not have happened without your great help.

Approved in 123 days

State of Residence: Oklahoma

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