North America Immigration Law Group - specialized in NIW (National Interest Waiver) and EB1 Greencard

North America Immigration Law Group (Chen Immigration Law Associates – WeGreened^®) is a U.S. immigration law firm dedicated to representing individuals, research institutions, and corporations across all 50 states in employment-based immigration matters, with a focus on I-140 immigrant petitions. We specialize exclusively in talent-based immigration categories and have a long-standing record of success in:

EB-2 NIW (National Interest Waiver)
EB-1A (Individuals of Extraordinary Ability)
EB-1B (Outstanding Researchers/Professors)
O-1 (Individuals of Extraordinary Ability)

64,000 Approvals: Unmatched Insight into USCIS Trends
With almost 64,000 approvals in the EB-1A, EB-1B, EB-2 NIW, and O-1 categories, we offer unparalleled insight into how USCIS evaluates these petitions. As USCIS standards continue to evolve, our vast case database enables us to track adjudication patterns and adapt strategies accordingly. We provide our clients with real-time guidance informed by tens of thousands of successful cases.

Attorney-Led, Individually Tailored Petitions
Each petition is prepared under the direct supervision of our experienced immigration attorneys. We do not use generic templates. Every case is individually crafted to highlight your strongest qualifications and align with the latest adjudication trends.

Approval or Refund^® — Our Confidence, Your Security
Since 2011, we’ve proudly offered our Approval or Refund^® service for eligible cases. If your petition is not approved, we refund our attorney fee in full—an offer that reflects our confidence and commitment to your success.
Both Approval or Refund^® and Approve or Refund^™ are exclusively owned trademarks of North America Immigration Law Group. These marks represent our long-standing dedication to excellence in legal representation and client service.
Approval or Refund^® is a registered trademark with the United States Patent and Trademark Office (USPTO), Registration Serial No. 86150599.

We’ve Helped Thousands with Profiles Like Yours
No matter your background, field of expertise, visa status, or nationality, chances are we’ve successfully represented hundreds or even thousands of individuals in similar situations. Our team understands the nuances of technical, academic, and professional work, and we use that insight to craft compelling, case-specific strategies.

We are trusted by professionals from top universities, national laboratories, Fortune 500 companies, startups, and leading medical institutions.

Browse our Success Stories to see how we’ve helped clients across every discipline and career stage.

Built on Trust, Proven by Referrals
Most of our clients come to us through personal referrals—from friends, colleagues, or family members who have experienced our results firsthand. Our reputation for success has fueled our growth—from 600 approvals in 2013 to almost 64,000 in 2025.

If you're looking for an experienced EB2 NIW attorney or I-140 petition expert with a proven record of success, you're in the right place.

Request a Free Evaluation today to see if you qualify—and let us help you secure your future in the United States.

Track Record of Success: EB-1 and NIW Approvals (2020–2024)

A Clear Path to

Your U.S. Green Card

Watch our experts walk you through the essential steps for first-time applicants.

Client Testimonials

I highly appreciate the outstanding work and help provided by North America Immigration Law group to me during my I-140 petition. They have very good understanding of the case and even easily understood my research and full profile to make the petition. There response before committed time is really appreciable. I found that the case taken by them is a big assurance that it is going to be approved. My EB1A- I-140 got approved very quickly even the day after the premium processing application was received without any RFE or difficulty.
I highly recommend Chen Immigration Team for green card petitions. Thanks a lot for their big help.

- S. S., Group 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

I applied for EB-2 trough North America Immigration Law Group. I got the I-140 approval in one month ! I would like to greatly appreciate for their professional jobs. According to my interaction with them in filling out the I-140 application during several months, I found them very trustful and expert. Therefore it is my pleasure to highly recommend this firm to persons who like to apply for EB-2 green card or related ones. In addition, the application fee is cheaper that other immigration attorneys. Thanks a lot

- R. N., Independent Research Scientist

Three of my friends who already got green card in EB1 category with the help of Chen immigration recommended me to contact this firm. They gave me free evaluation and approve and refund policy for my EB1B. I don’t know about other firm but I can say that I had a very good experience with Chen immigration. My attorney guided me on every single step and never got irritated even if asked same question several times. I got the answer of all my questions within 24 hours of time. As they promised, they wrote very strong letter of recommendation and drafted my petition within timeline. I was impressed the way they presented my case in the petition and as a results my case got approved in 7 days. I would strongly recommend Chen immigration to anyone trying to get green card under EB1 category. As I heard from my friends and I also experienced that they are the best with impressive team of attorneys. Thank you so much Chen immigration. It would not have been possible without your help. You are doing really good job. Keep it up !
Highly Recommended !!!!

- Dr. S. R., Assistant Professor

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

Many thanks to Chen immigration & Attorneys for their great help, and I had a very good experience working with this professional attorney team, they prepared high quality recommendation letters and petition letters, provide guide in detail and response questions in time, I am lucky to have such a team to help me get the approval. I strongly recommended them to all who are seeking green card.

- Y. H., Postdoctoral Research Associate

Success Story: EB1A Approved for Nanotechnology Engineer Advancing Energy and Sensor Applications

“Thank you for all the help.”

Approved in 29 days

State of Residence: Canada

Success Stories: Rapid NIW Approval for Translational Epidemiology Specialist Shaping U.S. Chronic Disease Treatment Strategies

“Thank you so much for this excellent news! And thank you so much for all your help throughout this process.”

Approved in 20 days

State of Residence: Massachusetts

Success Stories: A Strategic Race Against Time- Securing Approval Under EB-2 NIW for a CSPA-Impacted Family

“Thanks again for your outstanding support throughout this process.”

Approved in 392 days

State of Residence: Libya

Success Story: NIW Win for Turkish Postdoctoral Associate – Approved with the Help of Our Expert Support and Premium Processing Service

“As a researcher in the field of semiconductor technologies, I was looking for a reliable and experienced legal team to handle my EB2-NIW petition. Working with Chen Immigration Group exceeded my expectations. They carefully reviewed my scientific background and built a compelling petition that effectively communicated the national importance of my work. Their system is very organized, and their attorneys are extremely knowledgeable. My petition was approved swiftly, and I sincerely thank them for their excellent service.”

Approved in 58 days

State of Residence: Connecticut

Success Stories: NAILG Collaborated with PhD Candidate Specializing in Mechanical Engineering to Secure NIW Approval

“I had an excellent experience working with NAILG on my EB2-NIW petition. Their professionalism and responsiveness were outstanding, addressing all my questions about the process promptly and thoroughly. I highly recommend their services!”

Approved in 319 days

State of Residence: Arkansas

Success Story: We Helped a Ph.D. Student and Researcher Achieve Dual Success With EB1A and NIW Approvals – EB1A Approved via Premium Processing in Just 13 Days

“It’s been a great pleasure working with you, and I appreciate your support and assistance throughout what is otherwise a sensitive, stressful and complicated process that is immigration.”

Approved in 13 days

State of Residence: Georgia

Success Stories: Driving the Future of Clean Energy: EB2-NIW Approved for Solar Materials Scientist Advancing Perovskite Technologies

“I want to express my sincere gratitude to the entire team for their exceptional work throughout my petition process. From the beginning, the professionalism, expertise, and dedication displayed by everyone involved were outstanding. The attention to detail in preparing and documenting my case was remarkable, and I was consistently impressed by how seamlessly every step was handled. The clarity and efficiency with which the process was navigated made a challenging experience much easier, and I am deeply appreciative of the hard work and commitment shown. Communication was another standout feature of my experience. The timely responses and thorough guidance I received instilled confidence and support every step of the way. I extend my best wishes for continued success and prosperity for the firm. It has truly been a pleasure working with such an invaluable team, and I look forward to future opportunities to collaborate. Thank you once again for your exceptional support.”

Approved in 136 days

State of Residence: Vermont

Success Stories: Scaling Robotic Intelligence: EB2-NIW Approved for AI Researcher Revolutionizing Robot Learning Systems

“Thank you for your effort.”

Approved in 18 days

State of Residence: California

Success Story: Approved Without RFE! Graduate Research Assistant Achieves Seamless NIW Success, Thanks to Our Assistance

“I really appreciate the professionalism, prompt responses to my inquiries, the courtesy, and detailed guidance provided by my Attorney and the staff of the Chen Immigration team to me during my I-140 petition preparation process. The reference letters and the petition letter provided to me were incredibly detailed and strengthened my case. I appreciate the patience displayed throughout the process. I would highly recommend the North America Immigration Law Group to anyone with immigration issues. Thanks for all you do.”

Approved in 476 days

State of Residence: Nebraska

EB1A Approved for Cancer Biology Researcher Advancing Genome Stability and DNA Damage Response Research

“It was a great pleasure working with your team: the responses were professional and prompt.”

Approved in 21 days

State of Residence: California

Success Stories: EB-1A Petition Approved for Highly Cited Expert in Health Economics and Pharmacoeconomics

“Thank you so much for sending the approval notice for my EB1A case. It has been a pleasure working with you throughout this process, and I truly appreciate your support.”

Approved in 227 days

State of Residence: Ohio

Success Stories: Innovator in Computer Vision Secured NIW Approval for Nationally Important Research

“I am glad it got approved at the earliest without RFEs, thank you very much for your great efforts behind this :)”

Approved in 47 days

State of Residence: Arkansas

Success Stories: Decoding Memory and Decision-Making: NIW Approved in 23 Days with NAILG’s Support

“Thank you so much for your help! This is wonderful news.”

Approved in 23 days

State of Residence: New York

Success Story: A Research Assistant in the Field of Computer Science Won NIW Approval with Our Expert Filing and Strategy

Approved in 295 days

State of Residence: Alabama

Success Stories: A Postdoctoral Associate in the field of Biomedical Science from Bangladesh Earns EB2-NIW Approval

“I am incredibly grateful for the vigorous support and expertise of my immigration attorney throughout the successful approval of my I-140 petition. Their responses were consistently prompt, and their case writing was exceptional—thorough, well-organized, and enriched with relevant scientific citations that added strong weight to my petition.

I was particularly impressed by how carefully they analyzed and enhanced my research profile, crafting compelling statements around my journal articles and clearly articulating their scientific and societal impact. Their orientation toward scientific writing and attention to detail in presenting my work were instrumental to the strength of the petition.

I am fully satisfied with their service and would highly recommend them to any researcher seeking expert guidance in the immigration process.”

Approved in 309 days

State of Residence: Massachusetts

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