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'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

The best thing to happen to me in my GC process was my friend's recommendation of NAILG. They have been impeccable when it comes to keeping their promised time. They have also been giving me appropriate advice at appropriate times and have prepared a 1i140 packet that I could not have done myself in 100 years. I can't thank them enough.

- K. K., 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

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

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

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

Success Stories: RFE Successfully Addressed: NAILG Helped a Former Software Engineer Secure NIW Approval for Critical Transportation Safety Work

“Thank you so much! I really appreciate all your support and guidance throughout this process. It’s been a huge help.”

Approved in 185 days

State of Residence: Tennessee

Success Stories: Economist Granted NIW Thanks to NAILG’s Tailored Legal Strategy

“Thank you so much for your hard work and support in securing my I-140 NIW approval!”

Approved in 41 days

State of Residence: China

Success Stories: Indian Cardiovascular Biology Specialist Secures EB1A Approval in Just 6 Days with Premium Processing

“This is much faster than I expected! Thank you for all the help in drafting and filing the petition.”

Approved in 6 days

State of Residence: Connecticut

Success Story: NIW Victory for Life Science Expert from the Philippines – Approved Despite RFE with Premium Processing

“Thank you very much for your help and for making this process as smooth as possible! Greatly appreciate it!”

Approved in 150 days

State of Residence: California

Success Stories: Senior Data Analyst’s Machine Learning Research in Predictive Health Earned NIW Approval

“Thanks for all your work!”

Approved in 42 days

State of Residence: Texas

Success Stories: EB-2 NIW Approval for a Mechanical Engineering Researcher: Supporting Safer, Smarter Surgeries through Robotics Innovation

“The staff members are professional and attentive. They provided a timely and accurate response to the legal process. They guided the material preparation throughout, and polished the petition letter that emphasizes the customer’s strength.”

Approved in 475 days

State of Residence: California

Success Stories: At the Molecular Crossroads: Biomedical Researcher Secures NIW Approval

“Thank you very much for your continuous support.”

Approved in 520 days

State of Residence: Pennsylvania

Success Stories: Unlocking New Avenues in Cancer Treatment: Biomedical Scientist Secures EB1A Approval

“Thank you so much for the tremendous support from you. We enjoyed working with you as well.”

Approved in 9 days

State of Residence: Nebraska

Success Stories: NIW Approval for a Musculoskeletal Health Researcher from Iran — Approved Just 2 Days After PP Upgrade, Even With RFE

“I truly appreciate your expertise.”

Approved in 363 days

State of Residence: New York

Success Stories: NIW Granted to Assistant Professor Shaping the Future of Geological Intelligent Mining Technologies

“Thank you very much for your considerable consultation and help during my case.”

Approved in 483 days

State of Residence: Iran

Success Story: A Professor Wins NIW Petition Approved, Thanks to Our Expert Team

“I am happy to appreciate their contribution; they are very prompt and responsible.”

Approved in 345 days

State of Residence: Bangladesh

Success Story: NIW Approved Through Premium Processing: Our Expert Teams Supported Indian Researcher V in Earning a Successful Outcome

“It was indeed a great experience working with the Chen Immigration Attorney team. I have found this firm highly experienced, responsive and efficient in their job. I have applied for EB-2 NIW through premium processing and received a positive outcome in the desired time frame. I highly recommend Chen Attorneys for Immigration related concerns. If you need one, go with the best one.”

Approved in 58 days

State of Residence: Alabama

Success Stories: NAILG Secured EB-1A Approval for Expert in Health Informatics Following Successful NIW Approval

“Thank you to the WeGreened team for patiently answering all my queries. The team has been tremendously helpful throughout the process, and I am actively referring WeGreened to my colleagues, many of whom have already retained Chen Immigration for their own petitions.”

Approved in 14 days

State of Residence: Georgia

Success Stories: NIW Approved in 5 Days, EB1A in Just Over a Month – NAILG Secured Dual Success for Biomedical Postdoctoral Fellow

“It has truly been a pleasure working with you, and I greatly appreciate your support and assistance thus far.”

Approved in 36 days

State of Residence: Kentucky

Success Story: Securing U.S. Interests in Sustainability and Equality: NIW Granted to Pakistani Assistant Professor Despite RFE

“I am incredibly thankful for your help and support throughout this journey.”

Approved in 359 days

State of Residence: Pakistan

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