North America Immigration Law Group (Chen Immigration Law Associates - WeGreened®) is a U.S. immigration law firm dedicated to representing corporations, research institutions, and individuals from all 50 U.S. states regarding I-140 immigration petitions. We specialize in employment-based immigration petition and have a proven record of high success rate for the categories of: EB2-NIW (National Interest Waiver), EB1-A (Alien of Extraordinary Ability), EB1-B (Outstanding Researcher/Professor) and O-1 (Alien of Extraordinary Ability).

Our Ten Thousand I-140 Approvals Provide Unprecedented Insight into the USCIS Adjudication Trend
With more than 58,000 EB-1A, EB-1B, EB-2 NIW and O-1 cases approved, we have first hand information on the manner in which the USCIS adjudicate I-140 cases. As the USCIS has constantly changed its adjudication standards for the EB-1A, EB-1B and EB-2 NIW categories, our firm's huge database of successful cases gives you unprecedented insight to USCIS adjudication trends. We carefully analyze the data for all of our cases and apply the results of our analyses toward giving our clients up-to-date advice and adapting our strategies such that we remain on par with the ever-shifting landscape of immigration law in the U.S. With us, you will always have access to important updates, strategies, and information so that you can make the most informed decisions about your case.

We Have Helped Hundreds and Thousands of Clients with Credentials and Backgrounds Similar to Yours
With our exceedingly large number of successful petitions, no matter what credentials you have, no matter your background and field of expertise, no matter your visa status or nationality, chances are we have helped hundreds or even thousands of clients just like you. Our clients are usually impressed with how well we understand their research and work. Our insight and understanding stems from the fact that we have handled many cases with elements similar to yours already, and this helps us devise the best strategies for each individual petition.

Please see our success stories at https://www.wegreened.com/blog/

Vast Majority of Clients Came to Us Because of Referrals
For years, our firm has attracted new clients based solely on word of mouth, recommendations, and the positive collaboration experiences shared with them by their friends and family. We take pride in our reputation and work hard to ensure that we provide a green card application experience that our clients are happy to share with their friends and colleagues. That is how our cumulative total of approved cases grew from 600 in 2013 to over 58,000 in 2025. See what our clients have to say about our service.

Approval Rate For EB1 / NIW Cases Filed By North America Immigration Law Group From 2020 To 2023

Client Testimonials

I have to say the team at Chen Immigration Law Associates are very professional and responsive. My I-140 NIW EB-2 was approved recently and I truly appreciate all the patience and efforts that their team did for my case. As a result of this satisfactory experience, I am planning to continue working with Chen Immigration group for my I-485 case. Before applying for NIW, I searched many other lawyers and this firm was the best among them. Good luck everyone!

- A. S., Teaching/Research Assistant

Thank you to the North American Immigration Law Group/Chen Immigration and Attorneys for their unwavering support and help in helping my secure my I-140 approval under EB1A and also under NIW. Their service was professional and timely. They answered my million and one questions with patience and worked with me on every stage of the process. They helped draft the letters and were open to edits and comments from me. What I also liked was that they were open to receiving suggestions from me to help strengthen my case especially when we were responding to our RFE.
Thank you to this team for working diligently and patiently with me to help build my case and get the EB1A petition approved.
I highly recommend them.

- S. V., Assistant Professor

My EB1B I-140 got approved within 10 business days. I have worked with Chen Immigration Team from North America Immigration Law Group for 4 months before submitting my application. They were extremely thorough, meticulous and prompt with their service. They drafted all the necessary letters (employment verification, recommendation letters and petition letter) within the agreed timeline. They helped me to choose potential recommenders and were always quick to answer any of my questions. They are very professional and definitely know what they are doing. I will definitely recommend Chen Immigration Team to anyone who is planning to apply for Permanent Residency Status in USA.

- B., Scientist

I highly appreciate the outstanding work and help provided by North America Immigration Law group to me during my I-140 petition. They have very good understanding of the case and even easily understood my research and full profile to make the petition. There response before committed time is really appreciable. I found that the case taken by them is a big assurance that it is going to be approved. My EB1A- I-140 got approved very quickly even the day after the premium processing application was received without any RFE or difficulty.
I highly recommend Chen Immigration Team for green card petitions. Thanks a lot for their big help.

- S. S., Group Scientist

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 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

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Success Stories: A Chinese Lecturer Working in the Field of Artificial Intelligence Gets I-140 NIW Approval with Our Assistance

“This is very good news. Thank you and your team for your hard work and effort.”

Approved in 60 days

State of Residence: Hong Kong

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Success Stories: We Helped a Researcher from China in the Field of Developmental Biology Achieve NIW Approval Without Any Request for Evidence [RFE], Thanks to Our Team’s Efforts

“Thank you very much along the way!”

Approved in 304 days

State of Residence: Utah

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Success Stories: NIW Approval Granted to a GIS Analyst in the Field of Geography with Our Assistance

“Excellent work. I loved working with Katelyn and the team.”

Approved in 49 days

State of Residence: Arkansas

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Success Stories: Our Team Successfully Obtained NIW Approval for a Chinese Data Scientist in the Field of Applied Machine Learning

“Thank you very much for your guidance and support throughout the case preparation.”

Approved in 247 days

State of Residence: Connecticut

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Success Stories: NIW Petition Approved for a Mid-level Software Engineer in the Field of Computer Science, Thanks to Our Guidance and Premium Processing Service

“Wegreened made my NIW approval smooth and stress-free. Highly recommend them for immigration success!”

Approved in 46 days

State of Residence: Washington

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Success Stories: An Italian Battery Materials Specialist Working in the Field of Waste Management Received O1A as well as NIW Approvals with the Help of NAILG’s Teamwork

“I am incredibly grateful to the team at NAILG for their exceptional work in securing both my O1A and NIW approvals. Their expertise, dedication, and strategic approach made the entire process seamless. From the very beginning, they demonstrated a deep understanding of my field and crafted a compelling petition that highlighted the significance of my work in battery recycling and waste management. Their professionalism, timely communication, and meticulous attention to detail ensured that every aspect of my case was presented in the strongest possible light. Thanks to their efforts, I was able to navigate this complex process with confidence and achieve a successful outcome. I highly recommend NAILG to anyone seeking immigration support, they truly go above and beyond for their clients.”

Approved in 470 days

State of Residence: Texas

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Success Stories: A Computer Vision Scientist Achieves NIW and EB1A Case Approvals with the Help of Our Assistance and The Premium Processing Service

“I want to express my sincere gratitude to everyone who contributed to the smooth processing of my EB-1 application. The experience was remarkably similar to the positive one I had when working with the team to file my EB-NIW application. I am truly impressed by the prompt responses to my inquiries, the meticulous revisions made to recommendation letters and petition letters, and the overall professionalism displayed throughout the process. All of these factors ensured that my application was handled efficiently and received a timely response within a day. I highly recommend this service to my friends and colleagues in the future.”

Approved in 33 days

State of Residence: Washington

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Success Stories: A Singaporean Senior R&D Scientist Working in the Field of Biomedical Sciences Received O1-A Approval with the Expert Advice of NAILG

“The entire team provided consistent and excellent service, care, expertise and work on behalf of our O1and O3 applications. Please keep up the great work as you have assisted us tremendously during this trying period of our lives. Many and much thanks for the excellent and superlative work!!!! Congrats to you too for another successful mission to be added to the long list of accomplishments by you and the North American Immigration Law Group. Best wishes.”

Approved in 16 days

State of Residence: Florida

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Success Stories: NAILG Helped a Process Engineer from China to Obtain NIW Approval in the Field of Materials Science Without Any RFE Issuance

“I would like to sincerely thank Chen’s Immigration attorneys who were helping me preparing NIW case for the past year. All the attorneys are extremely knowledgeable and responsible. From time to time, I was busy and could not follow the case preparation on time, but all the attorneys were patient. Also, the writing skills are amazing, and the case preparation steps are done well. The entire time, I communicated and responded. Thank you all so much!”

Approved in 468 days

State of Residence: California

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Success Stories: Our Dedicated Expert Team Supported an Epidemiologist from India to Achieve an EB-2 NIW Petition Approval in 68 Days

“Thank you for all your help and effort towards my case.”

Approved in 68 days

State of Residence: California

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Success Stories: We Helped a Ph.D Candidate from Vietnam in the Field of Power Electronics Achieve NIW Approval in Just Two Months with Our Intelligence and Guidance. Also, Thanks to the Premium Processing Service!

“Thank you so much for your support and guidance throughout my I-140 NIW petition process. Thank you again for everything!”

Approved in 60 days

State of Residence: Canada

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Success Stories: A Chinese Postdoctoral Researcher Working in the Field of Mechanical Engineering Gets I-140 NIW Approval with Our Assistance

“Thank you for your email and for all your support throughout my I-140 NIW petition process. I am thrilled to receive this approval, and I truly appreciate your guidance and professionalism in making this happen. It has been a pleasure working with you and your firm. Thank you again for your excellent support!”

Approved in 34 days

State of Residence: China

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Success Stories: We Assisted a Chinese Senior Autonomy Engineer in Transportation Engineering to achieve NIW Approval, With the Premium Processing Service

Approved in 58 days

State of Residence: California

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Success Stories: NIW Petition Approved for A Research Assistant in the Field of Computational Engineering, Thanks to Our Guidance and Premium Processing Service

“I appreciate your hard work along the way!”

Approved in 65 days

State of Residence: Indiana

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Success Stories: With Our Meticulous Efforts, a Hardware Engineer III from Egypt Working in the Field of Electrical and Electronics Engineering Achieved NIW Approval

“I had an outstanding experience with Chen Immigration Law Associates. They provided exceptional support for my EB2-NIW case, helping me build a strong and well-prepared petition, which was approved without any issues. Thanks to their clarity and guidance, the entire process was smooth and straightforward. I truly appreciate their dedication and professionalism and highly recommend them for immigration services.”

Approved in 124 days

State of Residence: Oklahoma

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