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

Words can not describe my level of satisfaction working with folks at WeGreened. They have a rigid systematic approach to submit cases to USCIS (i.e. EB2-NIW in my case).
No hitting around the bush during working with you. Straight forward and logical folks. They throw it into your face when you are wrong, accept it with big heart if they fail. Turn-back time to your questions is within 24 business hours with no doubt at every single step of the progress. Do not doubt for even a single second to choosing them, regardless of your geographical point.

- T. J., Affiliate Faculty

I had a great experience working with Chen Immigration Law Group. I applied for EB1A premium processing and the case was approved within 2 weeks without any RFE.
I was impressed with the quality of petition letter and the reference letters drafted by their team. Although my field is highly technical, the attorneys seemed highly knowledgeable and were able to present my research in a manner which was easy to understand, impressive and yet not 'over-selling'.
They went over my research/citations meticulously and were able to catch mistakes which honestly I would have missed if I was preparing my own case. They were also very prompt with replying to any questions I had during the process.
In short, I would strongly recommend them to all who want to get through the green card process without stress.

- P. J., Postdoctoral Researcher

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

I highly appreciate the support and professionalism of Chen Immigration Law firm. Although it took me a long time to gather all my documents but attorneys from WeGreened.com were never late in replying to any of my concerns. They were extremely meticulous in analyzing my documents and made sure all my supporting exhibits were appropriate. In only 30-days my EB2/NIW was approved and I'm sure it was due to their experience handling of my case. I'll certainly recommend others to consider hiring Chen Immigration Law Assoc. for any kind of immigration purposes. One of my friends is already in touch with them after hearing my success story. I sincerely appreciate their time and effort in preparing my case.

- A. R., Postdoctoral Scholar

I worked with this firm for my I-140 EB2-NIW application. They delivered everything as promised. Preparing documents for this application is a cumbersome work but WeGreened makes it really straightforward and simple. All I had to do was to write a research summary and contact my references for recommendation letters. Even for these steps they provided some samples and templates. Their messaging platform is great! Although I never talked to any of the attorneys on the phone, all my questions were responded within less than 24 hours on the messaging platform.

- B. M., RF Computational Engineer

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 Stories: Dental Scientist Approved for NIW with NAILG’s Legal Guidance

“Working with NAILG was a truly reassuring and empowering experience. From day one, their team demonstrated an exceptional understanding of both the legal process and the scientific value of my work. Thanks to their expertise, my NIW petition was approved in under two months with premium processing. I highly recommend NAILG to any researcher seeking immigration support — they are professional, knowledgeable, and genuinely committed to your success.”

Approved in 46 days

State of Residence: Minnesota

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Success Story: NIW Success! Iranian Postdoctoral Associate Earns Approval Through Our Tailored Approach and Team Expertise

“I had a great experience working with your team and truly appreciate all the support provided throughout the process.”

Approved in 141 days

State of Residence: USA

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Success Story: Only 17 Days to EB1A Success! We Helped an Iranian Postdoctoral Scholar Get Approved via Premium Processing

“I want to extend my heartfelt thanks to the entire Chen Team for your incredible support, guidance, and expertise throughout this process. This wouldn’t have been possible without your dedication and thorough assistance. Congratulations to us all on this success!”

Approved in 17 days

State of Residence: Washington

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Success Stories: No RFE, 13-Day Approval: EB1A Granted to Postdoctoral Fellow in Computational Chemistry

“Every process was great for me. Many thanks for your kind support!”

Approved in 13 days

State of Residence: Texas

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Success Story: Without RFE, An India-Based Assistant Research Professor of Medicine Achieves NIW Success

“I truly appreciate your hard work and the team’s focus on detail. Your dedication gives me confidence in a positive outcome in my case. Thank you.”

Approved in 264 days

State of Residence: Indiana

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Success Story: Overcoming RFE! Our Firm Helped an Iraqi Senior Manager of Data Science Secure NIW Approval via Premium Processing

“I’m incredibly grateful to NAILG for guiding me through every step of the NIW petition process, especially when responding to the RFE. It meant a lot to have a team that understood both the technical depth and national importance of my work. Their attention to detail, responsiveness, and strategic framing of my case played a key role in the approval. From initial consultation to premium processing submission, they handled everything with professionalism and care. I highly recommend NAILG to any researcher or professional pursuing the NIW path.”

Approved in 174 days

State of Residence: North Carolina

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Success Stories: Healing Through Evidence: Nepalese Physician Secures EB-2 NIW with Premium Processing for Impactful Research in Internal Medicine

“Thank you so much for your help on this matter.”

Approved in 23 days

State of Residence: New York

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Success Story: An Iranian Mechanical Engineer Secured NIW Approval Quickly via Premium Processing with Our Expert Guidance

“I’m so incredibly happy to hear this wonderful news! Thank you so much for all your support and help throughout this process.”

Approved in 49 days

State of Residence: California

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Success Stories: Accelerated NIW Approval for Postdoctoral Research Fellow in Cutting-Edge Ophthalmic Imaging for Neurological Disorders

“Thank you so much for the wonderful news! I’m truly grateful for all your support throughout the I-140 NIW process. It has been a smooth and professional experience working with your team, and I appreciate your responsiveness and guidance at every step.”

Approved in 10 days

State of Residence: Florida

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Success Story: We Helped a Postdoctoral Associate from Poland Secure NIW Approval with Our Expert Guidance

“Very prompt replies, professional interaction, clear instructions, and high-quality documents prepared by the attorneys assigned to my case. Thank you all!”

Approved in 489 days

State of Residence: California

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Success Stories: NIW Granted for Breakthrough Research in Tumor Immunology and T Cell Modulation

“I am truly grateful to the North America Immigration Law Group (NAILG) for their professional and meticulous support throughout my EB-2 NIW petition process. They demonstrated a deep understanding of both immigration law and the scientific relevance of my research. What stood out most was their rigorous attention to detail—they carefully reviewed every word of my documents to ensure clarity, accuracy, and compliance. Every time I had a question, they responded promptly and professionally, which gave me great peace of mind.”

Approved in 354 days

State of Residence: California

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Success Story: Strategic Win: A Chinese PhD Candidate & Optometrist Secures NIW Approval Through Premium Processing Upgrade

“Thank you very much for the wonderful news!”

Approved in 48 days

State of Residence: Canada

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Success Story: NIW Victory Without RFE! We Helped an Iranian Ph.D. student, Teaching Assistant & Part-time Graduate Researcher Secure Success

“Thank you so much for the happy news. I enjoyed collaborating with your firm, and I will definitely suggest your firm to other applicants.”

Approved in 483 days

State of Residence: California

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Success Stories: Designing Defenses at the Molecular Level: A Microbiologist’s Extraordinary Journey to EB1A Approval

“Thank you, Chen Immigration Attorneys! You did an excellent job preparing my EB1A, I-140 application. The petition letter was drafted very nicely. Thank you for your support. I appreciate your efforts. I will recommend Chen Immigration to my friends in the future.”

Approved in 396 days

State of Residence: Texas

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Success Story: Our Firm Assisted an Assistant Research Scientist from India to Achieve NIW Approval

“They have been wonderful throughout the process.”

Approved in 296 days

State of Residence: Texas

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