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)

Client Testimonials

I'm so excited that my I-140 got approved within such a short time! I do think the North America Immigration Law Group did a great job. They are so patient to answer lots of my questions. The recommendation letters and petition letter are well prepared. That saved lots of my time! I will definitely recommend to my friends, as well as other people who prepare to apply for green card!

- X. L., Postdoctoral Fellow

It was a privilege to work with Chen immigration attorneys during my NIW I-140 application. They were really professional and kept the deadlines depicted by the client-attorney agreement. They will answer your questions within a day with the maximum clarity. I would definitely recommend them to anyone looking to apply for a NIW green card. Thanks once again and keep up the good work.

- I. S., Research Scientist

My I-140 petition under NIW category got approved. I have a phd in mechanical engineering and was a postdoctoral fellow at the time of submitting my petition. I would like to thank Chen Immigration Team in drafting the petition and recommendation letters. I am impressed by their professionalism, their willingness to respond to any question in a timely manner and their dedication in emphasizing every aspect of my work and research. I would not be able to draft such an assuring petition letter myself. I am so grateful to have Chen Immigration Team as my attorney. I highly recommend Chen immigration law group. Thank you so much.

- V. V.

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

The folks at Chen Immigration know what they are doing and did a fantastic job. They are extremely knowledgeable and helped me throughout the application process. Their letters were of top quality and would recommend them any day for any immigration related matters. Kudos to North America Immigration Law Group's team. Keep up the good work!!!

- A. S., Principal Consultant

WeGreened has been a pleasure to work with. They were so thorough with everything. With their very knowledgeable and able support and timely help in every respect I could finally get my I-140 approved in EB-1A category.
I would therefore highly recommend them to all who wants to file a permanent residency.

- R. C., Senior Development Scientist

Success Stories: Dental Scientist Approved for NIW with NAILG’s Legal Guidance

“Working with NAILG was a truly reassuring and empowering experience. From day one, their team demonstrated an exceptional understanding of both the legal process and the scientific value of my work. Thanks to their expertise, my NIW petition was approved in under two months with premium processing. I highly recommend NAILG to any researcher seeking immigration support — they are professional, knowledgeable, and genuinely committed to your success.”

Approved in 46 days

State of Residence: Minnesota

Success Story: NIW Success! Iranian Postdoctoral Associate Earns Approval Through Our Tailored Approach and Team Expertise

“I had a great experience working with your team and truly appreciate all the support provided throughout the process.”

Approved in 141 days

State of Residence: USA

Success Story: Only 17 Days to EB1A Success! We Helped an Iranian Postdoctoral Scholar Get Approved via Premium Processing

“I want to extend my heartfelt thanks to the entire Chen Team for your incredible support, guidance, and expertise throughout this process. This wouldn’t have been possible without your dedication and thorough assistance. Congratulations to us all on this success!”

Approved in 17 days

State of Residence: Washington

Success Stories: No RFE, 13-Day Approval: EB1A Granted to Postdoctoral Fellow in Computational Chemistry

“Every process was great for me. Many thanks for your kind support!”

Approved in 13 days

State of Residence: Texas

Success Story: Without RFE, An India-Based Assistant Research Professor of Medicine Achieves NIW Success

“I truly appreciate your hard work and the team’s focus on detail. Your dedication gives me confidence in a positive outcome in my case. Thank you.”

Approved in 264 days

State of Residence: Indiana

Success Story: Overcoming RFE! Our Firm Helped an Iraqi Senior Manager of Data Science Secure NIW Approval via Premium Processing

“I’m incredibly grateful to NAILG for guiding me through every step of the NIW petition process, especially when responding to the RFE. It meant a lot to have a team that understood both the technical depth and national importance of my work. Their attention to detail, responsiveness, and strategic framing of my case played a key role in the approval. From initial consultation to premium processing submission, they handled everything with professionalism and care. I highly recommend NAILG to any researcher or professional pursuing the NIW path.”

Approved in 174 days

State of Residence: North Carolina

Success Stories: Healing Through Evidence: Nepalese Physician Secures EB-2 NIW with Premium Processing for Impactful Research in Internal Medicine

“Thank you so much for your help on this matter.”

Approved in 23 days

State of Residence: New York

Success Story: An Iranian Mechanical Engineer Secured NIW Approval Quickly via Premium Processing with Our Expert Guidance

“I’m so incredibly happy to hear this wonderful news! Thank you so much for all your support and help throughout this process.”

Approved in 49 days

State of Residence: California

Success Stories: Accelerated NIW Approval for Postdoctoral Research Fellow in Cutting-Edge Ophthalmic Imaging for Neurological Disorders

“Thank you so much for the wonderful news! I’m truly grateful for all your support throughout the I-140 NIW process. It has been a smooth and professional experience working with your team, and I appreciate your responsiveness and guidance at every step.”

Approved in 10 days

State of Residence: Florida

Success Story: We Helped a Postdoctoral Associate from Poland Secure NIW Approval with Our Expert Guidance

“Very prompt replies, professional interaction, clear instructions, and high-quality documents prepared by the attorneys assigned to my case. Thank you all!”

Approved in 489 days

State of Residence: California

Success Stories: NIW Granted for Breakthrough Research in Tumor Immunology and T Cell Modulation

“I am truly grateful to the North America Immigration Law Group (NAILG) for their professional and meticulous support throughout my EB-2 NIW petition process. They demonstrated a deep understanding of both immigration law and the scientific relevance of my research. What stood out most was their rigorous attention to detail—they carefully reviewed every word of my documents to ensure clarity, accuracy, and compliance. Every time I had a question, they responded promptly and professionally, which gave me great peace of mind.”

Approved in 354 days

State of Residence: California

Success Story: Strategic Win: A Chinese PhD Candidate & Optometrist Secures NIW Approval Through Premium Processing Upgrade

“Thank you very much for the wonderful news!”

Approved in 48 days

State of Residence: Canada

Success Story: NIW Victory Without RFE! We Helped an Iranian Ph.D. student, Teaching Assistant & Part-time Graduate Researcher Secure Success

“Thank you so much for the happy news. I enjoyed collaborating with your firm, and I will definitely suggest your firm to other applicants.”

Approved in 483 days

State of Residence: California

Success Stories: Designing Defenses at the Molecular Level: A Microbiologist’s Extraordinary Journey to EB1A Approval

“Thank you, Chen Immigration Attorneys! You did an excellent job preparing my EB1A, I-140 application. The petition letter was drafted very nicely. Thank you for your support. I appreciate your efforts. I will recommend Chen Immigration to my friends in the future.”

Approved in 396 days

State of Residence: Texas

Success Story: Our Firm Assisted an Assistant Research Scientist from India to Achieve NIW Approval

“They have been wonderful throughout the process.”

Approved in 296 days

State of Residence: Texas

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