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:

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'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

I applied for EB-2 trough North America Immigration Law Group. I got the I-140 approval in one month ! I would like to greatly appreciate for their professional jobs. According to my interaction with them in filling out the I-140 application during several months, I found them very trustful and expert. Therefore it is my pleasure to highly recommend this firm to persons who like to apply for EB-2 green card or related ones. In addition, the application fee is cheaper that other immigration attorneys. Thanks a lot

- R. N., Independent Research Scientist

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

It is with great pleasure that I here come to express my highest gratitude and respect for North America Immigration Law Group. Victoria Chen and her incredible competent and professional Team of Attorneys are highly recommended by me. They diligently worked on my application and provided me with the best word of advice and expertise regarding my I-140 case. My process was approved within the standard and current processing time of four months. I am now, undoubtedly working with them again to apply for the I-485. I would recommend one and only Law Immigration Group, and that is Chen Immigration & Attorneys. This Team is stupendous.

- L. O., Senior Applications Engineer

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

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

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Success Story: Empowering Social Impact through Data Science: Chinese Researcher Secures NIW Approval

“I greatly appreciate the Chen Immigration Law Associates for your support with my NIW application! You are an excellent team. Many thanks for your hard work, prompt and clear response, and professional expertise! Special thanks to Belinda Bu for her great help and expertise!”

Approved in 63 days

State of Residence: Colorado

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Success Stories: Mapping Global Disease to Shape Local Solutions: A Vietnamese Researcher’s Ascent to Extraordinary Ability

“I am truly grateful for the thorough and professional support provided by the entire Chen Immigration team. You addressed all of my questions promptly and in detail, guiding me through each step and helping me prepare the strongest possible case. You demonstrated a clear understanding of the intricacies of my work and skillfully crafted a compelling case on my behalf.”

Approved in 9 days

State of Residence: Indiana

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Success Story: We Helped a Postdoctoral Scholar from China Achieve NIW Approval Without RFE

“I am glad to hear this good news. Thank you for your guidance and kind support.”

Approved in 472 days

State of Residence: California

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Success Stories: NAILG Expert Strategy Secured 21-Day NIW Approval for Computer Science Research Scientist

“Thanks for all the help in putting this petition together. Your team responded in a very timely manner and was very professional.”

Approved in 21 days

State of Residence: Iowa

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Success Stories: Associate Professor in Neuroscience Achieved EB-1A Approval with NAILG’s Expert Legal Support

“I will definitely refer you to my friends.”

Approved in 609 days

State of Residence: -

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Success Stories: Surgical Pathology Fellow Investigating Molecular Cancer Mechanisms Secured NIW in Just Over a Week With NAILG

“I got in touch with North America Immigration Law Group through a referral by a friend who also had a great experience. It was a wonderful experience working with them on my application. They always reply within 24 hours. They provided a high level of guidance as well as attention to detail. They suggested some extra documents based on recent trends. I am so happy for the case approval and want to thank them so much for guiding me through this path. Highly recommend them.”

Approved in 9 days

State of Residence: Florida

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Success Story: NIW Approved Without RFE: We Helped an Iranian Human Genetics Expert Achieve Success

“I am very thankful to the team for their help with my EB-2 NIW application. They worked hard and gave me clear advice, which made the process easier. Their support was important in getting my application approved without any problems. I am happy with their service and recommend them to anyone needing help with U.S. immigration.”

Approved in 347 days

State of Residence: Switzerland

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Success Stories: Strategic Petition Yielded 16-Day NIW Approval for Applied Researcher in Machine Learning

“Thank you so much for your support during my NIW petition! I’m truly grateful for your expertise, responsiveness, and guidance every step of the way.”

Approved in 16 days

State of Residence: California

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Success Stories: NAILG Guides PhD Candidate in Electrical Engineering to NIW Approval in 2 Months – No RFE, No Delays

“Thank you so much for your hard work! It was really a great experience.”

Approved in 60 days

State of Residence: North Carolina

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Success Story: NAILG Helped a Chinese Expert Earn NIW Approval via Premium Processing

“WeGreened’s streamlined process and responsive team made my NIW application smooth and stress-free. Their clear guidance saved me time and helped me present my achievements effectively. Highly recommended.”

Approved in 57 days

State of Residence: -

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Success Stories: Building Tomorrow’s Technologies: A Dual Win in Mechanical Engineering

“NAILG made my immigration journey much smoother than I expected. They really understood my research and knew exactly how to present it to USCIS. What stood out was how they turned my technical work into a compelling story that highlighted its importance to the U.S. The team was professional, responsive, and clearly experienced in handling cases like mine. Getting both NIW and EB1A approved speaks to their expertise. I’d definitely recommend them to fellow researchers looking for reliable immigration help!”

Approved in 457 days

State of Residence: California

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Success Stories: Statistical Physics PhD Candidate Earned NIW Approval for Advancing Understanding of Intelligent Systems

“My attorney was both professional and dependable. Thanks to his support, my case was successfully prepared within just a month and a half.”

Approved in 57 days

State of Residence: California

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Success Stories: EB-1A Approval Secured for Nuclear Physics Expert, NAILG’s Strategic Support Key to Success

“I greatly appreciate your help with my approved EB-1A.”

Approved in 397 days

State of Residence: New York

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Success Stories: NAILG Helped Cancer Immunotherapy Researcher Win NIW for High-Impact Research in Tumor Treatment

“I had a great experience working with NAILG on my NIW case. They understood the scientific details of my work and built a strong, well-organized petition. The process was smooth, and their team was always responsive and helpful. I’d definitely recommend them to other researchers.”

Approved in 126 days

State of Residence: Pennsylvania

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Success Stories: With NAILG’s Help, Plant Biology Postdoctoral Fellow Earned NIW for Contributions to U.S. Agriculture

“Thank you very much!”

Approved in 489 days

State of Residence: California

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