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)

Client Testimonials

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

It was an incredible experience working with Chen lawyers. I got my EB1A approved in 10 days. They were so perfect in their work and and took care of every little detail necessary. Very dependable and very friendly to work with. They were very prompt in answering every of my questions; and trust me they have been very kind to have responded to silliest of my doubts and concerns. I strongly recommend them to all my friends. Needless to mention, I am going to work with them for I-485 as well.

- T. K., Research Scientist

I am glad to know that my EB1 I-140 is approved. You made my dream come true. I am very thankful to North America Immigration Law Group. In addition to one's extraordinary credential, it is very important to have very good attorney for this success. Chen immigration attorneys are very brilliant and professional. They are very prompt in replying every query.
My several friends recommended Chen immigration and indeed they are great. I worked with Ms. Chen and Mr. Ingebritson. They have explained and simplified all process. Their wining strategy of selecting most useful credentials and presentation helped me in success of my case. I am completely satisfied with their service and highly recommending to everyone who is interested in employment-based green card application.
Thank you very much for all your help and advice during entire process of my application.

- P. N., Postdoctoral Fellow

The Chen Immigration Law group was recommended to me by a fellow postdoc at a networking event. He claimed that if they say that my credentials are good enough to file a case for a green card then it is almost certain success. He was absolutely right.
After evaluating my credentials we decided to apply under the EB2-NIW category. Overall, it was a pleasure working with them. All my questions were answered promptly and to the point. Although the communication was only through emails, it was very effective. They made very clear to me what documents are necessary and how to obtain them and they drafted amazing reference letters and the I-140 petition letter. The price was very reasonable (the best I could find) and they always keep their timeline.
I am really grateful for their service and I highly recommend them. Thank you so much!

- P. F., Post-doctoral Scientist

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

It was a long and tough journey to prepare the EB-1A I-140. However, with the professional assistance and prompt feedback from the NAIL firm, this process has become much easier. They always stick to the deadlines that have been promised (preparing reference letter in 10 days, petition letter in 10 days). Thank you Chen associates for your enormous help, which helped me get my case approved one day after USCIS received my Form I-140. I will absolutely recommend you to every of my friends who will be applying for the green card in the future.

- J. L., Postdoctoral Fellow

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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

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

Approved in 433 days

State of Residence: New York

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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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