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)

Client Testimonials

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

A real pleasure to work with Chen Immigration. I'm very satisfied with the process and, of course, with the result!
It was a persistent, systematic everyday job of their team for several months, tons of e-mails, all replied professionally. No need for a single phone call! No nerves, no hash, no mess, just persistent professional work that resulted in my approval.
Yes they ask for many supporting documents and evidence but the result is a very strong case approved without any RFE. That's extremely important to save time and nerves.

- A. B.

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

I have to say the team at Chen Immigration Law Associates are very professional and responsive. My I-140 NIW EB-2 was approved recently and I truly appreciate all the patience and efforts that their team did for my case. As a result of this satisfactory experience, I am planning to continue working with Chen Immigration group for my I-485 case. Before applying for NIW, I searched many other lawyers and this firm was the best among them. Good luck everyone!

- A. S., Teaching/Research Assistant

I am thankful to Victoria Chen and her immigration team for making this happen. I got my I-140 approved in EB1A category. This group is highly professional and I am very satisfied with the services. The reply to all of my questions were prompt. The team is extremely meticulous with documentation and drafting of letters, especially the petition. I strongly recommend North American Immigration Law group for US immigration!!!!

- P., Neuroradiologist and Research Scientist

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

Success Story: NIW Victory! Indian Postdoctoral Associate Approved with Our Help

“It was great working with you as well! Thank you so much for your hard work and support throughout the process. I’ve already left a 5-star review mentioning my NIW petition and have recommended your firm to a couple of friends—I will continue doing so.”

Approved in 313 days

State of Residence: New Mexico

Success Story: NAILG Helped An India AI Research Scientist Receive EB1A and NIW Approvals

“Thank you for helping me prepare my I-140 application and for thoroughly ensuring the correctness of the evidence packet.”

Approved in 396 days

State of Residence: Washington

Success Stories: EB-1A Granted to Post-Doctoral Research Fellow in the Field of Neurology Thanks to NAILG’s Tailored Petition Strategy

“Thank you so much for your kind message — it has truly been a pleasure working with your firm. I am incredibly grateful for your professional guidance and support throughout my EB1A case.”

Approved in 122 days

State of Residence: Maryland

Success Stories: Cancer Metabolism Instructor Granted EB-1A Status with Strategic Support from NAILG

“Highly professional and helpful. I really appreciate the help and support with filing my I-140 petition.”

Approved in 438 days

State of Residence: Texas

Success Stories: Fast-Tracked EB2-NIW Approval for an Indian Data Science expert via the Premium Processing

“Chen Immigration Law Firm truly stands out as the No. 1 in the field. From start to finish, their process was incredibly smooth and efficient. The team works ultra-fast, yet never compromises on attention to detail—they know exactly what USCIS wants to see in your petition, which gave me peace of mind throughout the entire process.

Beyond their technical expertise, the team is also highly responsive and supportive. They answered all my questions promptly and provided clear guidance every step of the way. I would highly recommend Chen Immigration Law Firm to anyone looking for top-notch service.”

Approved in 46 days

State of Residence: Texas

Success Story: NIW Petition Approved for PhD Student from China with Our Help from Expert Teams

“Wegreen is highly efficient and responsive.”

Approved in 239 days

State of Residence: Washington

Success Stories: Swift I-140 NIW Approval for a Biomedical Informatics PhD Student from China in Just 1 Month and 18 Days, Thanks to the Premium Processing

“I’m deeply grateful to WeGreened for their exceptional work on my NIW petition. Their expertise, responsiveness, and attention to detail made the entire process smooth and stress-free. Thanks to their guidance, my case was approved quickly. I highly recommend them to anyone pursuing a similar path.”

Approved in 48 days

State of Residence: Connecticut

Success Story: NIW Approved for MRI Researcher Enhancing Imaging Speed, Resolution, and Safety

“Working with Chen Immigration was a smooth and professional experience. Their team clearly understood the value of my research and presented it effectively in the petition.

They were organized, responsive, and skilled at translating technical work into a strong case for national benefit. Thanks to their guidance, my NIW petition was approved under standard processing. I highly recommend NAILG to any researcher pursuing this path.”

Approved in 480 days

State of Residence: California

Success Story: NAILG Secure Fast-Track NIW Approval for an Indian Staff Research Scientist with Direct Premium Processing

“That is great news! Thank you for sharing this update and thank you again for all your work. I appreciate the competence of the staff and their promptness in answering all of my questions.”

Approved in 37 days

State of Residence: New York

Success Story: NIW Approved! Iranian Full Professor in E-Commerce Field Achieves Success with Our Support

“Thank you so much for this fantastic news and all of your team’s hard work for my case.”

Approved in 289 days

State of Residence: Iran

Success Stories: NAILG Secured EB-1A Approval for an Assistant Professor in the Field of Medical and Public Policy After Prior NIW Success

“Thanks for your services.”

Approved in 15 days

State of Residence: Washington

Success Stories: From Algorithms to Acclaim — Computer Vision Scientist Secures O-1A Visa Approval

“Thank you for your excellent support on both my EB2-NIW and O1A petitions. I am very happy with your service and would be glad to leave a 5-star review. Thanks again for everything!”

Approved in 12 days

State of Residence: France

Success Stories: Premium Processing Accelerates EB2-NIW Approval for a Biotechnology Postdoctoral Associate from India

“I would like to express my deepest gratitude to the entire team at North America Immigration Law Group (NAILG) for their outstanding support and expert guidance throughout my EB2-NIW petition process. NAILG far exceeded my expectations in every regard.

From our first interaction, the team was highly organized, communicative, and deeply knowledgeable. They took the time to carefully assess my academic and research profile and provided a realistic and transparent evaluation of my case.

What I especially appreciated was how effectively NAILG translated complex scientific findings into accessible, persuasive language suitable for USCIS officers. Their legal writing was sharp, evidence-based, and strategic. The process from document collection to final petition submission was smooth, well-structured, and always on schedule.

I wholeheartedly recommend NAILG to any researcher or professional navigating the EB2-NIW process. Their team combines legal precision with a genuine commitment to their clients’ success. Choosing them was one of the best decisions I made in my immigration journey, and I am sincerely thankful for their support.”

Approved in 30 days

State of Residence: Massachusetts

Success Stories: Internal Medicine Assistant Professor Earned NIW for Precision-Focused Research with Help from NAILG

“I am currently working with Chen Immigration on my I-140 EB2-NIW petition, and I have been very impressed with their professionalism and expertise so far. My attorney has been incredibly thorough, responsive, and thoughtful throughout the entire process. They helped me carefully prepare my petition and provided detailed guidance at every step, making a complex process feel much more manageable. I highly recommend Chen Immigration to anyone looking for a dedicated and knowledgeable team to assist with their immigration journey.”

Approved in 31 days

State of Residence: Arkansas

Success Stories: From Swift NIW to EB-1A: NAILG Guided Research Assistant Professor in Electrical Engineering to Dual Approvals

“Thank you for the extraordinary services which led to the successful approval of my EB1A petition. I am truly grateful.”

Approved in 439 days

State of Residence: Texas

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