North America Immigration Law Group (Chen Immigration Law Associates - WeGreened®) 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: EB2-NIW (National Interest Waiver), EB1-A (Alien of Extraordinary Ability), EB1-B (Outstanding Researcher/Professor) and O-1 (Alien of Extraordinary Ability).

Our Ten Thousand I-140 Approvals Provide Unprecedented Insight into the USCIS Adjudication Trend
With more than 58,000 EB-1A, EB-1B, EB-2 NIW and O-1 cases approved, we have first hand information on the manner in which the USCIS adjudicate I-140 cases. As the USCIS has constantly changed its adjudication standards for the EB-1A, EB-1B and EB-2 NIW categories, our firm's huge database of successful cases gives you unprecedented insight to USCIS adjudication trends. We carefully analyze the data for all of our cases and apply the results of our analyses toward giving our clients up-to-date advice and adapting our strategies such that we remain on par with the ever-shifting landscape of immigration law in the U.S. With us, you will always have access to important updates, strategies, and information so that you can make the most informed decisions about your case.

We Have Helped Hundreds and Thousands of Clients with Credentials and Backgrounds Similar to Yours
With our exceedingly large number of successful petitions, no matter what credentials you have, no matter your background and field of expertise, no matter your visa status or nationality, chances are we have helped hundreds or even thousands of clients just like you. Our clients are usually impressed with how well we understand their research and work. Our insight and understanding stems from the fact that we have handled many cases with elements similar to yours already, and this helps us devise the best strategies for each individual petition.

Please see our success stories at https://www.wegreened.com/blog/

Vast Majority of Clients Came to Us Because of Referrals
For years, our firm has attracted new clients based solely on word of mouth, recommendations, and the positive collaboration experiences shared with them by their friends and family. We take pride in our reputation and work hard to ensure that we provide a green card application experience that our clients are happy to share with their friends and colleagues. That is how our cumulative total of approved cases grew from 600 in 2013 to over 58,000 in 2025. See what our clients have to say about our service.

Approval Rate For EB1 / NIW Cases Filed By North America Immigration Law Group From 2020 To 2023

Client Testimonials

Thank you to the North American Immigration Law Group/Chen Immigration and Attorneys for their unwavering support and help in helping my secure my I-140 approval under EB1A and also under NIW. Their service was professional and timely. They answered my million and one questions with patience and worked with me on every stage of the process. They helped draft the letters and were open to edits and comments from me. What I also liked was that they were open to receiving suggestions from me to help strengthen my case especially when we were responding to our RFE.
Thank you to this team for working diligently and patiently with me to help build my case and get the EB1A petition approved.
I highly recommend them.

- S. V., Assistant Professor

The efforts put forth by Chen Immigration and Attorneys has been instrumental in obtaining the approvals for my O1-A and EB-1B (I-140) petitions. The approvals came in 4 and 8 days respectively after request for premium processing. However, this did not happen overnight and neither did I want them to happen overnight. Although my credentials were in place for both the petitions, most of the time was spent on preparing the materials and revising them over and over again. I was very busy in my job and barely had time to go over revisions in a continuous basis. However, the team kept at it, always responding to my questions and carefully going over every single piece of text and supporting evidence. Being trained as a scientist during my PhD, I would say, it was more like writing an academic paper with collaborators - everybody invested time and energy into the process and in the end the paper got accepted. This is a win for us all!
It took around 5 months to prepare the materials mostly because of my intermittent involvements but it was worth the wait. That being said, the logical constructs and inferences laid down by my team of lawyers to construct the reasoning as to why I may be suitable candidate in the area of O1-A and EB-1B criteria is outstanding - there simply was not much room to refute the arguments. Very well done! I will always keep you in mind.

- P. D., Senior Research Scientist

I'm very happy with all the work and advice Chen Immigration Team have put into my NIW application. The responses were always timely, the letters drafted were polite, well-structured and timely. When I got my RFE, I was worried, but with the help of the attorneys working with me, the answer to the RFE lead to approval.
Not only do the members of the team work extremely hard and with highest professionalism, they also show that they believe in their clients, are able to emphasize all the achievements better than I ever could, and they genuinely care.
Thank you so very much!
I cannot be happier with everything you've done for me!

- M, Postpoc

One word to define Chen immigration: 'Professional'

First of all, I want to thank the immigration team for their timely and excellent services. They were absolute joy to work with and the team was thorough, experienced and well placed to provide me excellent reviews, advice throughout my EB2-NIW application process. I have already recommended a few of my friends who already echo my sentiments and will continue to refer Chen Immigration services to anyone who seek my advice.

- D. T.

I would like to thank the Chen Immigration team for getting my I-140 (EB-1B) approved with no RFE. I choose premium processing and the case was approved in 13 days. The team is very professional and helpful in every step on your way to the approval. I had many questions from time to time during the preparation process and they were answered in a timely manner. I have also retained them for I-485 and hope that it will also be approved in a timely manner.

- A. K.

I decided to choose North America Immigration Law Group based on some positive feedback and experiences that some of my friends had with. Working with them was great. They are very supportive and professional and they are well familiar with the rules and process. Everything was delivered on-time exactly as they promised. My application was approved in less than 60 days
I highly recommend them to anyone who needs their service, specially for NIW category. I already have referred some of my friends to Chen Immigration Law Services and they are also very happy and satisfied with their service.

- M. M., Postdoc

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Success Stories: Without RFE, a PhD Candidate in the Field of Biomedical Engineering Secures I-140 NIW Approval with the Help of Our Expert Team

“I would like to thank you for preparing my application! The petition letters you drafted, along with the recommendation letters, are very helpful. My questions have always been answered promptly. Overall, the whole process was fast, smooth, and well-guided. Thank you so much!”

Approved in 360 days

State of Residence: Wisconsin

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Success Stories: In Just 1 Month, 22 days, an Indian Research Scientist in the Field of Public Health Secures NIW Case Approval with the Help of Our Expert Team

“Thank you for your notice. Your services have been exceptional.”

Approved in 52 days

State of Residence: New York

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Success Stories: NIW Petition Approved for a Food Technologist – Quality Assurance from Nepal in the Field of Microbial Food Safety, Thanks to Our Team’s Efforts and the Premium Processing Service

“Great Work! Completely met and exceeded my expectations. They were swift to respond and also made sure to verify all documents and information precisely. All issues were instantly resolved and any confusion or issues I had were immediately addressed. I would recommend it to everyone.”

Approved in 49 days

State of Residence: Tennessee

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Success Stories: NIW Petition Approved for a Researcher from Togo in the Field of Nutrition Without Any Request for Evidence [RFE], Thanks to Our Team’s Dedication and Guidance

“I appreciated the work you did, especially the promptness with which you responded. Thank you so much for your kind words and support throughout the process. I’m thrilled to have my I-140 NIW approved, and I truly appreciate your expertise and guidance.”

Approved in 290 days

State of Residence: Togo

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Success Stories: A Senior Research Engineer from China in the Field of Wireless Communications Achieves EB1A Case Approval in Just 19 days with the Help of Our Assistance and Premium Processing

“Thank you team! It has been a great pleasure to work together, and thank you so much. This cannot happen without your professional and great effort.”

Approved in 19 days

State of Residence: Texas

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Success Stories: A Researcher in the Field of Electrical Engineering Successfully Obtained His NIW Petition Approved

“I am writing to express my deepest gratitude for your outstanding support and guidance throughout my EB2 NIW petition process. Your expertise, dedication, and professionalism were crucial in ensuring a smooth filing and, ultimately, a successful approval. A special thanks to Attorney Lei Lei for invaluable assistance, patience, and meticulous attention to detail. Your insights and strategic approach made a significant difference in strengthening my case. I truly appreciate the effort and dedication you and your team put into every step of the process. I am incredibly grateful for your exceptional service and unwavering support. I will gladly recommend Chen Associates to anyone seeking immigration assistance. Thank you again for everything!”

Approved in 93 days

State of Residence: Alabama

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Success Stories: In Just 2 Months, a Chinese AI Engineer in the Field of Machine Learning Systems Secures NIW Case Approval with The Help of Our Expert Team

“That’s great news! Thanks for handling my case with care and efficiency.”

Approved in 60 days

State of Residence: California

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Success Stories: NAILG Helps Biomedical Scientist from Zimbabwe Achieve NIW Approval

“I am extremely grateful to the Chen Immigration for their professionalism and expertise when I filed my EB-2 NIW petition. They were very helpful and answered all the questions I had during the process. In addition, they compiled an excellent petition packet which resulted in my case being approved with no RFE. I definitely recommend the team!”

Approved in 297 days

State of Residence: Massachusetts

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Success Stories: NAILG Assists Geotechnical Engineer in Securing NIW Approval for Advancing Deep Foundation Systems and Infrastructure Safety

“I am extremely satisfied with the exceptional service provided by the North America Immigration Law Group. Their expertise and meticulous approach in preparing my EB-2 NIW petition made the entire process smooth and stress-free. They effectively highlighted my contributions, ensuring my case was presented in the strongest possible way. Thanks to their guidance and professionalism, my petition was approved efficiently. I highly recommend NAILG to anyone seeking a reliable and knowledgeable team for their NIW petition.”

Approved in 65 days

State of Residence: Kansas

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Success Stories: We Helped a Ph.D. Candidate from Thailand in the Field of Digital Economy Achieve NIW Approval in Just 1 Month, 25 Days with Our Intelligence and Guidance. Also, Thanks to the Premium Processing Service

“Thank you all so much for the preparation, hope I can get the good news from the USCIS.”

Approved in 55 days

State of Residence: Thailand

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Success Stories: NIW Petition Approved for a Ph.D. Candidate from Pakistan in the Field of Civil Engineering, Thanks to Our Team’s Dedication and Guidance

“Thank you for your excellent service. The entire process of composing the petition letter was quite enjoyable. Every detail ran smoothly. Each of the responses received from the Attorney was highly informative and well directed. Overall, I am extremely satisfied with your service. Thank you.”

Approved in 297 days

State of Residence: Texas

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Success Stories: Biostatistics Expert Secures EB-1A Approval with Our Law Firm’s Assistance

“Thanks for all the efforts!”

Approved in 37 days

State of Residence: Massachusetts

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Success Stories: Despite a Request for Evidence [RFE], Our Team Successfully Secured NIW Approval for a Full Professor in the Field of Chemistry

“I want to express my profound gratitude to you and the Firm for this wonderful news of the approval of my I-140 petition. Your passion, dedication, dexterity, and professionalism made this possible. Even when it looked gloomy, you reassured me that the final result would be good. The manner in which you handled the appeal gave me the confidence that you are doing the needful. I am really grateful and very proud of you. Surely I will be glad to recommend your firm to my friends who will be interested. I will not have a problem with you sharing the success story in the manner you have stated. Once again, a very big thank you.

Chen Attorney has shown a lot of professionalism in preparing my case. They painstakingly look at every detail with the goal of getting the best results. They are very timely in attending to the various stages involved in the case preparation. I must commend their efforts.”

Approved in 521 days

State of Residence: Nigeria

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Success Stories: NIW Petition Approved for a Senior Scientist from China in the Field of Pharmaceutical Sciences in 1 Month, 21 Days, Thanks to Our Team’s Dedication and the Premium Processing Service

“It has also been a great experience working with your firm.”

Approved in 51 days

State of Residence: New Jersey

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Success Stories: A Chinese Ph.D. Candidate Working in the Field of Computer Science Gets I-140 NIW Approval with Our Assistance

“The team is responsive and professional. I am very happy with the entire process!”

Approved in 50 days

State of Residence: New York

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