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
For eligible cases, we offer our Approval or Refund® service. If your petition is not approved, we refund our attorney fee in full—an offer that reflects our confidence and commitment to your success.

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

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 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.

One word to define Chen immigration: 'Professional'

First of all, I want to thank the immigration team for their timely and excellent services. They were absolute joy to work with and the team was thorough, experienced and well placed to provide me excellent reviews, advice throughout my EB2-NIW application process. I have already recommended a few of my friends who already echo my sentiments and will continue to refer Chen Immigration services to anyone who seek my advice.

- D. T.

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 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

The fact I like most about the Chen Immigration and Attorneys is their communication systems and responses. Throughout the whole application process until approval, I had lots of questions in different phases regarding case file preparation, EAD cards, travel with AP, service request etc. What I needed to do was to leave a message in the case management system and got detailed and satisfactory responses in a timely manner.
Their services ranging from the free evaluation at the first day to case preparation and drafting recommendation and petition letters have exhibited high professionalism and standard. I would suggest anyone to retain them for his/her I140 and I485 case preparation.

- S. A., Postdoctoral Researcher

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Success Story: NIW Approved Without RFE for Chinese Research Engineer in the Field of Materials Science

“This is great news to hear the case has been approved. Really appreciate all the hard work and effort in drafting, document preparation, and answering my related questions.”

Approved in 497 days

State of Residence: Minnesota

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Success Stories: NAILG Facilitates NIW Success for an Upcoming Postdoctoral Researcher Specializing in Cardiovascular Medicine

“Thank you so much for your incredible work and dedication on my petition. I truly appreciate all your help and support throughout the process.”

Approved in 59 days

State of Residence: Minnesota

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Success Stories: NIW Petition Approved for a Physicist from China without any Request for Evidence [RFE]

“Working with WeGreened on my EB2 NIW case, I found their practical approach and experience invaluable – they anticipated potential issues before they arose and made sure my application highlighted my genuine contributions.”

Approved in 443 days

State of Residence: -

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Success Stories: Chinese Electrical Engineer Achieves NIW Approval in Just 41 Days with Direct Premium Processing

“Thank you very much!”

Approved in 40 days

State of Residence: West Virginia

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Success Story: In Just 11 Days, A Chinese Robotics Development Engineer working in the Field of Computer Vision Received O1-A Approval with the help of NAILG’s teamwork

“The approval of O1A means a lot to me. Many thanks to my attorney Mr. Robert and Chen’s team for their dedication and hard work throughout this process. They are fast and professional, handling every challenge with ease.”

Approved in 11 days

State of Residence: Florida

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Success Stories: NIW Approved in 12 Days: PhD Student in Biotechnology Benefits from Premium Processing

“Thanks to the NAILG group for the assistance!”

Approved in 12 days

State of Residence: New York

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Success Stories: NAILG Secures NIW Approval for an Assistant Professor Specializing in Artificial Intelligence

“I am incredibly grateful to NAILG for their expertise and support throughout the NIW process. Their team meticulously gathered and presented the evidence of my work’s impact, which ultimately led to the successful approval of my petition. I am now able to continue my research in artificial intelligence in the United States, contributing to advancements that have significant implications for various industries and the nation as a whole.”

Approved in 313 days

State of Residence: New Jersey

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Success Stories: EB2-NIW Approved in 58 Days for Chinese Physicist Through Premium Processing

“It was an absolute pleasure working with you”

Approved in 58 days

State of Residence: China

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Success Stories: Rapid EB-1A Approval in 5 Days for Research Specialist in the Field of Cancer Biology with Premium Processing

“Thank you very much for this great news! It is much faster than I expected.”

Approved in 5 days

State of Residence: Utah

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Success Stories: With NAILG’s Guidance, a Postdoc Researcher in the Field of Condensed Matter Physics Successfully Gained NIW Approval

“I want to say thank you to your firm for my I-140 case preparation because your prompt response and consistent guidance mapped out the overall case strategy, which paid off. You worked hard in the case preparation, finding all the right legal angles and cases to back us up. Your strategy was crystal clear from start to finish. It kept us on track and focused. Your written and spoken communication skills were top-notch. You made complex legal stuff sound simple and convincing. Overall, your guidance, support, and case preparation were spot-on and will make a huge difference. I will highly recommend your services to my other friends and colleagues. Thanks for your hard work and dedication.”

Approved in 158 days

State of Residence: New York

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Success Stories: NAILG Guides Assistant Professor in Information and Telecommunication Technology to Successful NIW Petition Approval

“I want to say thank you to your firm for my I-140 case preparation because your prompt response and consistent guidance mapped out the overall case strategy paid off. You worked hard in the case preparation, finding all the right legal angles and cases to back us up. Your strategy was crystal clear from start to finish. It kept us on track and focused. Your written and spoken communication skills were top-notch. You made complex legal stuff sound simple and convincing. Overall, your guidance, support, and case preparation were spot-on and will make a huge difference. I will highly recommend your services to my other friends and colleagues. Thanks for your hard work and dedication.”

Approved in 358 days

State of Residence: Pakistan

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Success Stories: Electronics Engineering PhD Candidate Achieves NIW Approval in Less Than a Month with NAILG’s Premium Processing

“I am very happy with the Chen Immigration Law Firm. I appreciate your efforts and attorney Ziqian’s work in preparing the petition letter. The PL had a great presentation in general, and I think everything was mentioned thoroughly. I really liked how much attention to detail was done in my I-140 form and other forms to have a very consistent package. Thank you!”

Approved in 27 days

State of Residence: Vermont

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Success Stories: In Just 32 Days, a Ph.D. Student in Marine Science Earns NIW Approval via Premium Processing with NAILG

“Many thanks. Got the approval. It was nice working with you and, of course, the attorney I worked with.”

Approved in 32 days

State of Residence: Massachusetts

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Success Stories: Indian HCI Researcher Receives EB1A Approval in Just 15 Days with Direct Premium Processing

“This is great news, thank you so much! I appreciate all the work the team put in, a very big thank you to you all for the meticulous and detailed work that got this through. I am very grateful to you all, this makes such a big difference to my family and me.”

Approved in 15 days

State of Residence: New York

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Success Stories: Our Client’s Deep Learning Research Leads to NIW Approval in Just Over a Month with Premium Processing

“I hope this message finds you well. I wanted to take a moment to express my deepest gratitude for your exceptional guidance and support throughout the process of securing approval for my NIW I-140. Your expertise and dedication have been invaluable, and I am truly appreciative of all your efforts. Once again, thank you for your professionalism, patience, and unwavering commitment to my case. I am grateful to have you on my side.”

Approved in 50 days

State of Residence: New York

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