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

I will definitely recommend North America Immigration Law Group to all my friends who is seeking for immigration services. I am very, very impressed by their excellent service. The entire process is very professional and they have been responsive and responsible. They will do their best in every little detail to make you case stronger. Their service and attitude towards every case define their high reputation.

- B. H., Postdoctoral Research Fellow

I received my EB1 A I 140 approval notice a few days ago.
Chen Immigration made this possible. it would have been very difficult to pull this through without their help!
They are very thorough in evaluating your case , respond within 24 hours to every questions you post and work diligently in getting petition letter and LOS done in time . There is no doubt in my mind that Chen immigration are the best attorneys to represent your case.
I have recommended several of my friends and will continue to do so. Thank you so much!

- S. S.

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

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 had worked with Chen Immigration group for my O-1A visa first and then retained with them for my I-140 petition under EB1A category. Their services are rapid and prompt with an affordable fee structure. They also have very high success rate of approvals. They have taken utmost care on all the required documentation. They usually respond to my questions in 1 business day. I highly recommend Chen Immigration group for my fellow colleagues for their petitions under various categories.

- R. V., Chief Technology Officer

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

Success Stories: Expert Advocacy in Action: NAILG Achieves NIW Approval for Machine Learning Applied Scientist

“I’m very satisfied with the service provided. The team was highly professional, responsive, and thorough throughout the entire process. All documents, including the petition and reference letters, were well-prepared and thoughtfully written. I truly appreciate the support and expertise—thank you for making this experience smooth and stress-free.”

Approved in 24 days

State of Residence: California

Success Stories: Flexible Technology, Tangible Impact: NIW Approved for Researcher in 3D-Printed Soft Robotics

“It was a great experience working with WeGreened.com. I received answers to all my questions in a fast and precise manner. Once I finished some steps in the process, I typically received feedback and further instructions the same or the next day. Thus, the process was only delayed by my capability and time availability.”

Approved in 506 days

State of Residence: New York

Success Stories: Bridging Global Economies: EB1B Approval Secured for Researcher Advancing Trade and Immigration Policy

“I am very happy with my experience with WeGreened, and I highly recommend them to all. My EB1B was approved without an RFE and the whole process was very seamless. Their clear guidance and attention to detail were instrumental for the success of my application.”

Approved in 18 days

State of Residence: Virginia

Success Story: 16-Day NIW Success! China-Based Postdoc Wins Approval with Our Strategy and Premium Processing

“I’m truly thankful to the WeGreened team for their outstanding support throughout my NIW petition. As a postdoctoral researcher in computational chemistry, I was impressed by their deep understanding of both immigration law and scientific research. They helped me frame my work in a way that clearly aligned with national interest, and their attention to detail and responsiveness made the entire process smooth and reassuring. Thanks to their expertise, my case was approved in just 16 days. I highly recommend WeGreened to any researcher seeking a strong and strategic NIW application.”

Approved in 16 days

State of Residence: North Carolina

Success Stories: Another Record: A Health Scientist in Public Health Received EB-1A Approval in 8 Days with NAILG’s Premium Processing

“This is great news! Thank you so much for all your efforts. I truly appreciate you and your team. It was a worthwhile experience. Thank you so much. It has been my utmost pleasure working with your team and the best experience I have had so far in America. I wish I could leave more than a 5-star review. I thank you so much.”

Approved in 8 days

State of Residence: Georgia

Success Stories: EB1A Approval for a Biotechnology Expert from China

“Thank you for your efforts!”

Approved in 21 days

State of Residence: -

Success Story: With Our Expert Guidance, A Pakistani Senior Researcher Achieved NIW Approval

“This firm is very cooperative and is very fast in replying to any queries.”

Approved in 293 days

State of Residence: South Korea

NIW Approved for a Staff Scientist Advancing Natural Product Drug Discovery

“I really appreciate the excellent work done by Chen Immigration Law Firm.”

Approved in 115 days

State of Residence: Florida

Success Stories: NIW Petition Approved for a Bioengineering Researcher with NAILG’s Support

“Working with Chen for my green card application has been very systematic and streamlined. They provided a detailed framework to pen down my expertise and gave me advice on how best to formulate the petition. The final petition letter was drafted with utmost care and detail.”

Approved in 393 days

State of Residence: California

Success Stories: Precision in the Genome: EB2-NIW Approved for South Korean Bioengineer Advancing Gene Therapy and Disease Modeling

“Overall, the process was super smooth, and attorneys were very helpful and informative in answering whatever questions I had throughout the process. I highly suggest anyone considering applying for NIW use the Chen Immigration Attorneys service.”

Approved in 249 days

State of Residence: California

Success Stories: No RFE, Fast Approval: NAILG Secured EB-1A for Leading Researcher in Human Liver Disease

“I wanted to take a moment to sincerely thank you for your exceptional support and guidance throughout the I-140 EB1A petition process. I am thrilled to know that the petition has been approved, and I truly could not have reached this milestone without your expertise, diligence, and encouragement. Your deep knowledge of the process, meticulous attention to detail, and unwavering commitment to presenting the strongest possible case were evident every step of the way. I greatly appreciate the time you invested in understanding my background and helping to frame my qualifications effectively.”

Approved in 16 days

State of Residence: Indiana

Success Story: Accelerating Precision Cardiovascular Therapies: Vietnamese PhD Candidate Earns NIW Approval

“Thank you so much for your amazing work and for all your support throughout the I-140 NIW process!”

Approved in 49 days

State of Residence: North Carolina

Success Stories: A Precision Mind Behind the Lens: EB1A Approved for Fluorescence Microscopy Researcher

“Thank you so much for all your efforts on my green card application. I’m very grateful for all your help.”

Approved in 503 days

State of Residence: New Mexico

Success Story: NIW Approval for a Chinese Ph.D. Student in Materials Science Despite RFE

“I am grateful to Chen Immigration Law Firm for their outstanding support during my EB-2 NIW application. Their team provided professional and highly detailed guidance throughout the entire process, and the response is always timely. Their letters were well-drafted. highly recommended.”

Approved in 173 days

State of Residence: California

Success Stories: EB1A Approval Secured for a Biomedical Scientist from India, Advancing Global Cancer Research

“I am very thankful to the team’s support and continuous guidance throughout my EB1 process, as well as my previous NIW process. They are very professional, meticulous, responsive, and very detailed. They know all the immigration processes in depth and guide you with all the details. I appreciate all their help and recommend them to anyone going through the same journey.”

Approved in 458 days

State of Residence: Washington

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