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)

61,000 Approvals: Unmatched Insight into USCIS Trends
With more than 61,000 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 over 61,000 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 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.

We just wanted to thank Chen Immigration for their help during this process. They were absolutely amazing. They responded to all our questions with such detail and were thorough in their examination of all our supporting documentation. They were quick with their responses and always stuck to the timeline. They provided us amazing templates for all out letters of recommendation and overall were exceptional. Highly competent and would strongly recommend to anybody looking for immigration assistance.

- G. B.

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.

- N. F., PhD

I had a great experience working with Chen Immigration Law Group. I applied for EB1A premium processing and the case was approved within 2 weeks without any RFE.
I was impressed with the quality of petition letter and the reference letters drafted by their team. Although my field is highly technical, the attorneys seemed highly knowledgeable and were able to present my research in a manner which was easy to understand, impressive and yet not 'over-selling'.
They went over my research/citations meticulously and were able to catch mistakes which honestly I would have missed if I was preparing my own case. They were also very prompt with replying to any questions I had during the process.
In short, I would strongly recommend them to all who want to get through the green card process without stress.

- P. J., Postdoctoral Researcher

It was a long and tough journey to prepare the EB-1A I-140. However, with the professional assistance and prompt feedback from the NAIL firm, this process has become much easier. They always stick to the deadlines that have been promised (preparing reference letter in 10 days, petition letter in 10 days). Thank you Chen associates for your enormous help, which helped me get my case approved one day after USCIS received my Form I-140. I will absolutely recommend you to every of my friends who will be applying for the green card in the future.

- J. L., Postdoctoral Fellow

It was fantastic to work with Chen Immigration Law Group. I got my I140 approval just in 4 months.Chen Immigration Law Group is a very professional company.They answered all my questions with timely manner and prepared my I140 package really good that I received my approval way before than I expected. I also really like their online service which makes everything easy to understand and to follow the instructions correctly and help you to handle such a complex paper work efficiently.

- A. C., Postdoc

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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