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:

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'd like to thank Chen Immigration and attorneys for the great job they did on my I-140 application for NIW. They put together a compelling petition letter with appropriate exhibitions which resulted in my I-140 approval only in 72 days at Nebraska Service Center (the average wait time at this center is more than 10 months now). The team at this firm are experts and experienced. They meticulously prepare all the required documents and effectively communicate with the client. They deliver on time & with the highest quality. I have recommended them to my friends who would like to apply for NIW or EB1A. Chen group knows what they are doing and they are the best, go with them!

- H. C., Postdoctoral Scholar

It has been a pleasure working with the Wegreened Team. I always received prompt, courteous and professional responses from them throughout the EB1A filing process. They guided me in developing the material for the reference letters, drafted the letters in a timely manner and prepared a strong case which eventually lead to success. I am really grateful to them for all their help.

- V. J., Senior Engineer

Many thanks to NAmILG/Chen Immigration for the quality and efficiency of their services. They have always replied very fast to any of my requests or questions. They have provided me with very clear answers and guidelines to navigate the I-140 application process. Their preparation of the file and their drafting of letters were thoroughly thought out and meticulous. I consider they have played a key role in the success of my I-140 application.
I would highly recommend Chen Immigration for their professionalism, honesty, and straightforwardness.

- P. A. M., Postdoctoral fellow

My EB1A was approved four days after USCIS received my documents. I'm very impressed by the professionalism and enthusiasm of NAmILG during preparation and filing of my case. The prompt approval of my case wouldn't be possible without the expertise and hard working of the attorneys of NAmILG.
One of the advantages of NAmILG I want to point out is they drafted all of the required letters, which saved huge amount of time for me. I'll definitely recommend to my friends who are looking for immigration attorneys.

- T. W., Postdoc

I cannot describe how excited I was when I got to know that my I-140 EB1A application has been approved. This simply could not be true if without the professional help from the North America Immigration Law Group. I don't think that my background conditions were safe for this application. But I knew that their preparation strategy made my case pretty strong. Although the application was long and challenging, it was very nice to work with their team during the whole process period. They impressed me with excellence, professionalism, and highly responsiveness. I do believe that their service is the best one in the immigration business.
Thank you so much for your effort to help me get through the EB1A application. I have recommended and will be happy to continue recommending your professional team to other people who really want to be greened.

- K. J., Electrical Engineer at New York State

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

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Success Story: EB1A Approved for Nanotechnology Engineer Advancing Energy and Sensor Applications

“Thank you for all the help.”

Approved in 29 days

State of Residence: Canada

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Success Stories: Rapid NIW Approval for Translational Epidemiology Specialist Shaping U.S. Chronic Disease Treatment Strategies

“Thank you so much for this excellent news! And thank you so much for all your help throughout this process.”

Approved in 20 days

State of Residence: Massachusetts

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Success Stories: A Strategic Race Against Time- Securing Approval Under EB-2 NIW for a CSPA-Impacted Family

“Thanks again for your outstanding support throughout this process.”

Approved in 392 days

State of Residence: Libya

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Success Story: NIW Win for Turkish Postdoctoral Associate – Approved with the Help of Our Expert Support and Premium Processing Service

“As a researcher in the field of semiconductor technologies, I was looking for a reliable and experienced legal team to handle my EB2-NIW petition. Working with Chen Immigration Group exceeded my expectations. They carefully reviewed my scientific background and built a compelling petition that effectively communicated the national importance of my work. Their system is very organized, and their attorneys are extremely knowledgeable. My petition was approved swiftly, and I sincerely thank them for their excellent service.”

Approved in 58 days

State of Residence: Connecticut

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Success Stories: NAILG Collaborated with PhD Candidate Specializing in Mechanical Engineering to Secure NIW Approval

“I had an excellent experience working with NAILG on my EB2-NIW petition. Their professionalism and responsiveness were outstanding, addressing all my questions about the process promptly and thoroughly. I highly recommend their services!”

Approved in 319 days

State of Residence: Arkansas

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Success Story: We Helped a Ph.D. Student and Researcher Achieve Dual Success With EB1A and NIW Approvals – EB1A Approved via Premium Processing in Just 13 Days

“It’s been a great pleasure working with you, and I appreciate your support and assistance throughout what is otherwise a sensitive, stressful and complicated process that is immigration.”

Approved in 13 days

State of Residence: Georgia

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Success Stories: Driving the Future of Clean Energy: EB2-NIW Approved for Solar Materials Scientist Advancing Perovskite Technologies

“I want to express my sincere gratitude to the entire team for their exceptional work throughout my petition process. From the beginning, the professionalism, expertise, and dedication displayed by everyone involved were outstanding. The attention to detail in preparing and documenting my case was remarkable, and I was consistently impressed by how seamlessly every step was handled. The clarity and efficiency with which the process was navigated made a challenging experience much easier, and I am deeply appreciative of the hard work and commitment shown. Communication was another standout feature of my experience. The timely responses and thorough guidance I received instilled confidence and support every step of the way. I extend my best wishes for continued success and prosperity for the firm. It has truly been a pleasure working with such an invaluable team, and I look forward to future opportunities to collaborate. Thank you once again for your exceptional support.”

Approved in 136 days

State of Residence: Vermont

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Success Stories: Scaling Robotic Intelligence: EB2-NIW Approved for AI Researcher Revolutionizing Robot Learning Systems

“Thank you for your effort.”

Approved in 18 days

State of Residence: California

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Success Story: Approved Without RFE! Graduate Research Assistant Achieves Seamless NIW Success, Thanks to Our Assistance

“I really appreciate the professionalism, prompt responses to my inquiries, the courtesy, and detailed guidance provided by my Attorney and the staff of the Chen Immigration team to me during my I-140 petition preparation process. The reference letters and the petition letter provided to me were incredibly detailed and strengthened my case. I appreciate the patience displayed throughout the process. I would highly recommend the North America Immigration Law Group to anyone with immigration issues. Thanks for all you do.”

Approved in 476 days

State of Residence: Nebraska

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EB1A Approved for Cancer Biology Researcher Advancing Genome Stability and DNA Damage Response Research

“It was a great pleasure working with your team: the responses were professional and prompt.”

Approved in 21 days

State of Residence: California

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Success Stories: EB-1A Petition Approved for Highly Cited Expert in Health Economics and Pharmacoeconomics

“Thank you so much for sending the approval notice for my EB1A case. It has been a pleasure working with you throughout this process, and I truly appreciate your support.”

Approved in 227 days

State of Residence: Ohio

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Success Stories: Innovator in Computer Vision Secured NIW Approval for Nationally Important Research

“I am glad it got approved at the earliest without RFEs, thank you very much for your great efforts behind this :)”

Approved in 47 days

State of Residence: Arkansas

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Success Stories: Decoding Memory and Decision-Making: NIW Approved in 23 Days with NAILG’s Support

“Thank you so much for your help! This is wonderful news.”

Approved in 23 days

State of Residence: New York

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Success Story: A Research Assistant in the Field of Computer Science Won NIW Approval with Our Expert Filing and Strategy

Approved in 295 days

State of Residence: Alabama

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Success Stories: A Postdoctoral Associate in the field of Biomedical Science from Bangladesh Earns EB2-NIW Approval

“I am incredibly grateful for the vigorous support and expertise of my immigration attorney throughout the successful approval of my I-140 petition. Their responses were consistently prompt, and their case writing was exceptional—thorough, well-organized, and enriched with relevant scientific citations that added strong weight to my petition.
 
I was particularly impressed by how carefully they analyzed and enhanced my research profile, crafting compelling statements around my journal articles and clearly articulating their scientific and societal impact. Their orientation toward scientific writing and attention to detail in presenting my work were instrumental to the strength of the petition.
 
I am fully satisfied with their service and would highly recommend them to any researcher seeking expert guidance in the immigration process.”

Approved in 309 days

State of Residence: Massachusetts

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