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

Thank You Chen Immigration and Attorneys for your tremendous effort on helping me approve my NIW EB-2 petition. They are very professional from start to end. All the questions asked were answered in a professional manner in timely basis. I really appreciate all your work and suggestion during the process. If anyone of you plan to file your NIWS, Chen Immigration and Attorneys are probably the best options out there.

- M. K., Geophysicist

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

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.

The fact I like most about the Chen Immigration and Attorneys is their communication systems and responses. Throughout the whole application process until approval, I had lots of questions in different phases regarding case file preparation, EAD cards, travel with AP, service request etc. What I needed to do was to leave a message in the case management system and got detailed and satisfactory responses in a timely manner.
Their services ranging from the free evaluation at the first day to case preparation and drafting recommendation and petition letters have exhibited high professionalism and standard. I would suggest anyone to retain them for his/her I140 and I485 case preparation.

- S. A., Postdoctoral Researcher

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

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

Success Story: An Indian Principal Deep Learning Software Engineer Working in the Field of Artificial Intelligence Obtains both NIW and EB1A Approvals with the help of NAILG’s Experts

“Thank you so much! This is fantastic!”

Approved in 74 days

State of Residence: Washington

Success Stories: NAILG Fast-Tracks EB-1A Approval in Just 19 Days for Doctor in Rehabilitation Medicine

“Thank you so much for your help throughout the whole process. You are always helpful and efficient, and I hope your firm will continue to be successful in the future.”

Approved in 19 days

State of Residence: Taiwan

Success Stories: NAILG Helped Laboratory Manager in Analytical Chemistry Secure NIW Approval After RFE Response

“This is amazing news. Thank you very much for the professionalism and the thoroughness with which you handled my case. I can’t thank you enough in words.”

Approved in 181 days

State of Residence: Canada

Success Story: Swift NIW Approval for Brazilian Urologist Thanks to Our Expert Guidance

“Thank you very much to the NAILG for your professionalism and assistance during the process. I would not be able to get this approval without your help. It was a long process, but I felt very confident all the way through, thanks to your guidance. You are by far the best immigration law firm I have worked with.”

Approved in 303 days

State of Residence: Georgia

Success Stories: Optimizing the Future: Machine Learning Researcher Secures EB-2 NIW Approval for Work in AI-Based Financial Forecasting

“I am deeply grateful to the team for their exceptional support on my NIW petition. Their expert guidance was instrumental in navigating the RFE, and they were always incredibly patient and responsive in answering all of my questions. I wholeheartedly recommend their services.”

Approved in 443 days

State of Residence: Massachusetts

Success Story: Seamless Approval Thanks to Our Expert Team! NIW Success for a Postdoctoral Researcher – No RFE Required

“I am extremely satisfied with the whole case preparation process and outstanding support and response during case preparation.”

Approved in 370 days

State of Residence: Italy

Success Stories: From Application to Approval: NAILG Secured EB-1A for Machine Learning Scientist

“Thank you for the help during the process. I really like your professionalism, prompt responses, and expertise.”

Approved in 381 days

State of Residence: Canada

Success Stories: NAILG Partnered with Orthodontics Innovator to Secure NIW Approval

“I want to thank you for your support during this process. I just commented on your site, and I am so honored to have such a wonderful attorney beside me.”

Approved in 488 days

State of Residence: Iran

Success Secured! NIW Approved for 1st year Ph.D. Student from Bangladesh with a B.Sc. Degree with Our Expert Support

“I’m overall happy with the case preparation. The petition letter seems very good to me. I must recommend WeGreened to my peers. Good luck! Thank you for your support throughout my case process. I truly appreciate the excellent service provided by your team.”

Approved in 181 days

State of Residence: Illinois

Success Story: NAILG’s Expert Team Helped a China Postdoctoral Fellow Secure NIW Victory with Premium Processing Service

“I am incredibly grateful to the Chen’s team for their exceptional support throughout my NIW application process. Their expertise and dedication ensured that every aspect of my case was meticulously handled, leading to a successful outcome. The attorney was consistently responsive, providing prompt and precise answers to all my questions. I highly recommend their services to anyone navigating complex immigration matters.”

Approved in 63 days

State of Residence: Missouri

Success Stories: NIW Success for Associate Professor in Pharmaceutics Focused on Improving Drug Safety and Efficacy

“Thank you for your efforts and support!”

Approved in 505 days

State of Residence: Egypt

Success Stories: NIW Petition for Biomedical Scientist Approved with NAILG’s Expert Legal Strategy

“Congratulations to us for the I-140 approval. Thank you so much for your help with this. I really appreciate your support and for working with me on this.”

Approved in 36 days

State of Residence: Maryland

Success Story: NIW Win! Our Firm Helped a Machine Learning Scientist from China Get Approved Through the Premium Processing Upgrade

“Thank you for the help with the whole process. I’m very glad with the result.”

Approved in 43 days

State of Residence: California

Success Stories: Building Inclusive Futures: How a Rehabilitation Researcher is Advancing Vocational Support for Individuals with Autism.

“Thank you so much for your kind message and for all your support throughout this process. I truly appreciate the opportunity to share my experience to help others who are going through a similar journey.”

Approved in 55 days

State of Residence: Wisconsin

Success Story: Only 10 Days! EB1A Refile Success for India-Based Lead Data Scientist, Thanks to Our Expert Assistance and Premium Processing Service

“The Chen firm is very professional, making the entire process smooth and timely. I was always impressed with how they interpreted the complexities of my work and case while presenting it in the best possible manner for the petition.”

Approved in 10 days

State of Residence: California

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