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

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.

My I-140 (NIW) was approved this week!
I was fortunate to come across Chen immigration when I started looking into my options for green card. I quickly realized they are extremely professional and would handle my case at a personal level. Indeed, over the last 1 year they have performed beyond my expectations.
Chen immigration team gave me a free evaluation after assessing my portfolio. Their timing for my case has been impeccable at every step. The lawyers have worked with me as a team. Communication with the whole firm has just been outstanding. I would recommend Chen Immigration extremely highly to all my friends and anyone who is in my shoes and looking into the process for Green card.

- M. R., Physician

It was an incredible experience working with Chen lawyers. I got my EB1A approved in 10 days. They were so perfect in their work and and took care of every little detail necessary. Very dependable and very friendly to work with. They were very prompt in answering every of my questions; and trust me they have been very kind to have responded to silliest of my doubts and concerns. I strongly recommend them to all my friends. Needless to mention, I am going to work with them for I-485 as well.

- T. K., Research Scientist

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

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

I am Associate Professor in Mechanical Engineering. I would like to extend my deepest gratitude to Chen immigration group for their great help on my NIW-I-140 case preparation and filing. Undoubtedly without your help, it was not possible to get my application approved. Thank you for such an amazing support. Their professional guidance, patience, and prompt responses make the whole process efficient and successful. I highly recommend Chen immigration group!

- A. A. D. S., Associate professor at Engineering

NIW Approved for a Researcher Advancing Wireless Networks Despite a Request for Evidence (RFE)

“I truly appreciate your support and guidance throughout this process — it’s been a pleasure working with your team. Once again, thank you for your excellent service.”

Approved in 422 days

State of Residence: -

EB1A Approved for Computational Scientist Advancing AI-Driven Cancer Genomics and Molecular Modeling

“Thank you to the team for helping me through this process.”

Approved in 14 days

State of Residence: California

Success Stories: EB2-NIW Petition Approved for an Iranian Power Electronics Expert Despite the RFE (Request for Evidence), Thanks to NAILG

“I am truly grateful to the North America Immigration Law Group (NAILG) for their outstanding support throughout my EB2-NIW petition process. From the initial consultation to the final approval, the team demonstrated exceptional professionalism, attention to detail, and a deep understanding of immigration law. Despite receiving a Request for Evidence (RFE), they crafted a thorough and compelling response that ultimately led to a successful outcome. Their guidance was instrumental in presenting my research and achievements in the best possible light. I highly recommend NAILG to any researcher or professional seeking a trusted partner on their immigration journey.”

Approved in 403 days

State of Residence: New Zealand

Success Stories: With NAILG’s Expert RFE Response, EB1A Approved for Biomedical Engineering Lecturer

“Thank you for your message! This is the best news I have received in a while! Thank you so much for your team’s hard and excellent work!”

Approved in 112 days

State of Residence: China

Success Story: Our Strategic Filing and Premium Processing Service Leads to 14-Day O1-A Approval for Interventional Cardiologist from Nepal

“I was extremely satisfied with the service they provided. They were prompt, professional, and highly responsive—always getting back to me in less than 12 hours. They communicated effectively with my employer, which made the entire process smooth and stress-free. They clearly knew what needed to be done and guided me every step of the way. I would definitely recommend this lawyer for O-1 visa services to my colleagues.”

Approved in 14 days

State of Residence: Texas

Success Stories: Physician Resident in Neurology Achieved NIW Approval After RFE, Supported by NAILG’s Expert Legal Team

“Thank you so much! I really appreciate all your support throughout this process. It’s been a pleasure working with you guys as well!”

Approved in 185 days

State of Residence: Ohio

Success Stories: 13-Day NIW and 18-Day EB-1A Approvals for Welding Expert, Thanks to NAILG’s Premium Processing

“Today, my EB1 A application was approved under Premium processing in 15 business days. I am very happy the way the Chen team has worked with me, preparing all the required documents. I always got a reply in 48 hours with clear information on what needed to be done. I was offered regular service rather than refund service, but I do have faith in my credentials and gave it a try.

I 100 % recommend and truly appreciate the way the attorney worked with me throughout the application process. They are very professional, and I will give a 5-star rating to this firm.”

Approved in 18 days

State of Residence: Virginia

Success Stories: Accelerating a Greener Grid: Energy Scientist from Pakistan Secures EB-2 NIW Approval for Pioneering Work in Power Sustainability

“Thanks a lot for all your assistance and timely messages! I don’t have any complaints – the entire process was seamless and prompt.”

Approved in 485 days

State of Residence: California

Success Stories: Accelerating Drug Discovery with AI: NAILG Supports a Machine Learning Innovator from Bangladesh in Securing NIW Approval

“I sincerely appreciate the outstanding support from my attorney throughout my EB2-NIW petition. Their clear communication, prompt responses, and careful preparation of the petition made the entire process smooth and successful. I highly recommend their expertise to anyone pursuing similar immigration goals.”

Approved in 344 days

State of Residence: South Carolina

NIW Approved for Quantum Physics Researcher Advancing Photonic Materials and Quantum Technologies

“I would like to thank you for all your help and communication.”

Approved in 485 days

State of Residence: New York

Success Stories: Premium Processing Enabled 14-Day EB-1B Approval for Assistant Professor in Artificial Intelligence

“This is really great news. Thank you so much for your help.”

Approved in 14 days

State of Residence: Michigan

Success Stories: Dual Wins for Senior Transmission and Interconnection Engineer – NIW and O-1A Approved with NAILG’s Strategic Advocacy

“I am incredibly grateful to North America Immigration Law Group for their exceptional legal support and expertise in successfully securing approvals for both my EB2-NIW and O-1A immigration petitions. From the initial consultation to the final approvals, the team demonstrated a deep understanding of the complexities involved in both visa categories. They took the time to thoroughly assess my background, achievements, and goals, and then crafted highly strategic and persuasive petition packages that highlighted my qualifications and national interest contributions. What truly stood out was their meticulous attention to detail, strong writing skills, and the ability to present my professional record in a compelling, well-documented narrative. The attorneys were responsive, knowledgeable, and transparent throughout the process, patiently addressing my questions and guiding me through each step.”

Approved in 412 days

State of Residence: Florida