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

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

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

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

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

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

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.

Success Stories: EB1A Approval Granted to Cardiovascular Disease Researcher Despite RFE

“Thank you for all your help and guidance.”

Approved in 118 days

State of Residence: Arizona

Success Stories: EB-1A Approved with NAILG’s Assistance of a PhD Candidate in Biostatistics

Approved in 433 days

State of Residence: New York

Success Stories: We Helped a Manufacturing Project Engineer from China in the Field of Renewable Energy Achieve NIW Approval in Just 1 Month, 28 Days with Our Intelligence and Guidance. Also, Thanks to the Premium Processing Service!

“Thank you for making this happen!”

Approved in 58 days

State of Residence: Kansas

Success Stories: We helped a Ph.D. student from China in the Field of Electrical and Electronics Engineering achieve NIW Approval in just 1 month, thanks to Premium Processing!

“Thank you very much for your quick update. I am also glad to work with you to have this swift approval. Thank you again for all your help.”

Approved in 31 days

State of Residence: Maryland

Success Story: Without RFE Issue, We Helped A Postdoctoral Research Associate in the Field of Biochemistry and Molecular Biology Secure an NIW Petition Approved

“Thank you for the message, and thanks so much for all your help during my case preparation.”

Approved in 488 days

State of Residence: Missouri

Success Stories: Electrical Engineering Expert Secures NIW Approval with Our Strategic Guidance

“Thank you for all your help and prompt service every step of the way.”

Approved in 361 days

State of Residence: Georgia

Success Stories: Biophysics Researcher Wins NIW Approval for Transformative RNA Investigation

“I am extremely satisfied with the overall case preparation process and the outstanding support I received from my attorney, Ashley L., at Chen Immigration Law Associates. From the very beginning, Ashley demonstrated a deep understanding of the NIW I-140 process and provided exceptional guidance at every stage of the case preparation. She assisted me thoroughly in drafting and refining the petition letter, recommendation letters, SOC details, and the proposed endeavor—each document was thoughtfully crafted and tailored to highlight the strengths of my case. Her professionalism, attention to detail, and prompt responses to all my questions made the entire process smooth and stress-free. Ashley’s dedication and expertise gave me great confidence in the quality and strength of my petition. The filing process, including premium processing, was completed efficiently and without delay. I’m truly grateful for Ashley’s support and highly recommend Chen Immigration and Attorney Ashley L. to anyone pursuing an employment-based immigration petition. Thank you for your outstanding service!Thank you again for your kind message and for all the support you and the Chen Immigration Team provided throughout my I-140 NIW petition process. I’m truly grateful for your professionalism, responsiveness, and expertise. Thanks again for everything!”

Approved in 37 days

State of Residence: Oregon

Success Stories: Success Stories: Cardiovascular Researcher from China Secures NIW Approval for Groundbreaking Medical Discoveries

“Thank you very much for your great help throughout the whole process! I am happy to write a review on the website.”

Approved in 321 days

State of Residence: China

Success Story: No RFE Needed: A Postdoctoral Researcher Achieves NIW Approval with Our Expert Support

“Very helpful. The news makes my day.”

Approved in 478 days

State of Residence: Midwestern US

Success Story: I-140 EB1B Approval Secured for a Researcher from China After NOID and Premium Processing Upgrade

“I appreciate the attorney’s full support regarding my decision on the NOID, thank you for the prompt and professional suggestions throughout the evidence collection and letter drafting processes”

Approved in 761 days

State of Residence: Minnesota

Success Stories: Indian Computer Security Researcher Secures NIW Approval in Just 39 Days with Our Dedicated Assistance

“Many thanks for all the work to make it happen :).”

Approved in 40 days

State of Residence: Washington

Success Stories: NIW Approval Granted to Battery Materials Engineer in Under a Month Using Our Premium Processing

“Thank you so much for helping me get through this process, as I had a lot of changes in my status during the preparation of this case. Without the guidance I received, it would have taken much longer for me to fill out any forms. I cannot thank you enough for such great service! I will always recommend Chen Immigration Team to my colleagues, friends, family, etc. when they are in need of an immigration attorney.”

Approved in 28 days

State of Residence: California

Success Stories: Iranian Associate Professor Secures NIW Approval Through Research in Corporate Governance

“Thank you very much for your kind message and support throughout the process. I am very satisfied with your services and would happily leave a 5-star review. Thank you again for your excellent work. I truly appreciate it.”

Approved in 490 days

State of Residence: Iran

Success Stories: A PhD candidate in the Field of Industrial Engineering Secures I-140 NIW Approval with the Help of Our Expert Team in just 10 days, Thanks to the Premium Processing Service

“I am writing to sincerely thank you all for the incredible care, guidance, and detailed documentation you provided throughout my I-140 NIW petition process. I truly feel fortunate to have had your team handle my case—your professionalism, responsiveness, and expertise made the entire experience so much smoother and less stressful. I’m very happy to share that I’ll definitely be keeping your firm for the next steps in this immigration journey. Your continued support is deeply appreciated. Thank you again for everything.”

Approved in 10 days

State of Residence: Kentucky

Success Stories: Two Wins, One Expert: NIW and EB-1A Granted to Research Scientist in Material Science

“Thank you very much! I really appreciate the professional service provided by your team for my NIW and EB1A applications. I like that the team does a very thorough review of the application package in the pre-filing stage to correct any minor errors and put together a quality package for the client. I enjoyed working with NAILG and would recommend it to my friends and colleagues. I would also definitely use their services if needed in the future. # Best Immigration Attorneys for NIW and EB1A. The attorney answered my queries quickly and with detailed explanations, which helped me at every point of the preparation process!”

Approved in 433 days

State of Residence: Virginia

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