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北美联合律师事务所(North America Immigration Law Group; Chen Immigration Law Associates)是一家从事美国移民的律师事务所,致力于代表来自美国50个州的公司、研究机构和个人,针对I-140移民申请提供法律服务。 我们专精于职业移民申请,并在下列移民类别保有高成功率的证明记录: EB2-NIW(国家利益豁免)EB1-A(杰出人才)EB1-B(杰出教授/研究员)

我们所累积的上万件I-140批准通知让我们对美国移民局的裁决趋势有着前所未有的洞察力
拥有上万笔的EB-1A,EB-1B和EB-2 NIW批准纪录,我们对USCIS判决I-140案件的方式有着丰富的第一手资料。 由于USCIS会不断改变对EB-1A,EB-1B和EB-2 NIW类别的裁决标准,我们事务所累积的庞大成功案例数据库能提供您前所未有且透彻的USCIS裁决趋势。 我们仔细分析我们所有案例的数据,将分析结果应用于为客户提供最新的建议,并随时调整我们的策略,使我们与美国不断变化的移民法规局势保持一致。 与我们合作,您可以随时得知重要的更新、策略和信息,让您可以对您的申请做出最明智的决定。

我们已经成功帮助过上万位背景和条件与您相似的客户
我们经手过众多的成功案例。无论您的条件、背景、专业领域、签证身份或国籍为何,我们极有可能已经帮助过数百名甚至数千名和您相似的客户。 我们的客户通常对我们能如此了解他们的研究和工作感到印象深刻。 我们的洞察力和理解来自于我们已经处理过许多与您条件类似的案例,这使我们有能力为每份申请量身订制最佳策略。

许多客户都是因为他人的推荐而与我们接洽
多年来,我们事务所吸引了许多新客户与我们合作,他们全都是基于我们的口碑、他人的推荐以及朋友和家人所分享的愉快合作经验而选择我们。 我们以我们的声誉自豪,也努力确保我们提供令人满意的绿卡申请服务给每位客户,让客户乐于与他们的朋友和同事分享经验。 这就是为何截至2025年,我们累积的批准案件总数已从2013年的600件成长至超过61,000件。

北美联合律师事务所 2020 年至 2024 年EB1 / NIW 案件批准数据

顾客见证

The efforts put forth by Chen Immigration and Attorneys has been instrumental in obtaining the approvals for my O1-A and EB-1B (I-140) petitions. The approvals came in 4 and 8 days respectively after request for premium processing. However, this did not happen overnight and neither did I want them to happen overnight. Although my credentials were in place for both the petitions, most of the time was spent on preparing the materials and revising them over and over again. I was very busy in my job and barely had time to go over revisions in a continuous basis. However, the team kept at it, always responding to my questions and carefully going over every single piece of text and supporting evidence. Being trained as a scientist during my PhD, I would say, it was more like writing an academic paper with collaborators - everybody invested time and energy into the process and in the end the paper got accepted. This is a win for us all!
It took around 5 months to prepare the materials mostly because of my intermittent involvements but it was worth the wait. That being said, the logical constructs and inferences laid down by my team of lawyers to construct the reasoning as to why I may be suitable candidate in the area of O1-A and EB-1B criteria is outstanding - there simply was not much room to refute the arguments. Very well done! I will always keep you in mind.

- P. D., Senior Research Scientist

I am Associate Professor in Mechanical Engineering. I would like to extend my deepest gratitude to Chen immigration group for their great help on my NIW-I-140 case preparation and filing. Undoubtedly without your help, it was not possible to get my application approved. Thank you for such an amazing support. Their professional guidance, patience, and prompt responses make the whole process efficient and successful. I highly recommend Chen immigration group!

- A. A. D. S., Associate professor at Engineering

I had a great experience working with Chen Immigration Law Group. I applied for EB1A premium processing and the case was approved within 2 weeks without any RFE.
I was impressed with the quality of petition letter and the reference letters drafted by their team. Although my field is highly technical, the attorneys seemed highly knowledgeable and were able to present my research in a manner which was easy to understand, impressive and yet not 'over-selling'.
They went over my research/citations meticulously and were able to catch mistakes which honestly I would have missed if I was preparing my own case. They were also very prompt with replying to any questions I had during the process.
In short, I would strongly recommend them to all who want to get through the green card process without stress.

- P. J., Postdoctoral Researcher

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.

I heard about this law firm from one of my friends who had high recommendation. Before approaching Chen Immigration Law Associates, I had personally talked to an immigration lawyer whose fee was expensive and the lawyer did not seem much positive regarding my EB2-NIW case. When I first contacted Chen Immigration Law Associates for free EB2-NIW evaluation and heard that my case is eligible for approval or refund, it energized me and made me believe that my case is strong enough too. Though communication was only through email, it was easy and reliable. The timeline set in the contract is always fulfilled. I am really happy that I chose this law firm and I highly recommend it to anyone seeking immigration advice and services. Once again, I am very thankful to the team of Chen Immigration Law Associates for all their effort in making my petition a success.

- O. P.

My EB1A was approved four days after USCIS received my documents. I'm very impressed by the professionalism and enthusiasm of NAmILG during preparation and filing of my case. The prompt approval of my case wouldn't be possible without the expertise and hard working of the attorneys of NAmILG.
One of the advantages of NAmILG I want to point out is they drafted all of the required letters, which saved huge amount of time for me. I'll definitely recommend to my friends who are looking for immigration attorneys.

- T. W., Postdoc

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Success Story: NIW Victory! Indian Postdoctoral Associate Approved with Our Help

“It was great working with you as well! Thank you so much for your hard work and support throughout the process. I’ve already left a 5-star review mentioning my NIW petition and have recommended your firm to a couple of friends—I will continue doing so.”

Approved in 313 days

State of Residence: New Mexico

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Success Story: NAILG Helped An India AI Research Scientist Receive EB1A and NIW Approvals

“Thank you for helping me prepare my I-140 application and for thoroughly ensuring the correctness of the evidence packet.”

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Success Stories: EB-1A Granted to Post-Doctoral Research Fellow in the Field of Neurology Thanks to NAILG’s Tailored Petition Strategy

“Thank you so much for your kind message — it has truly been a pleasure working with your firm. I am incredibly grateful for your professional guidance and support throughout my EB1A case.”

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Success Stories: Cancer Metabolism Instructor Granted EB-1A Status with Strategic Support from NAILG

“Highly professional and helpful. I really appreciate the help and support with filing my I-140 petition.”

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Success Stories: Fast-Tracked EB2-NIW Approval for an Indian Data Science expert via the Premium Processing

“Chen Immigration Law Firm truly stands out as the No. 1 in the field. From start to finish, their process was incredibly smooth and efficient. The team works ultra-fast, yet never compromises on attention to detail—they know exactly what USCIS wants to see in your petition, which gave me peace of mind throughout the entire process.
 
Beyond their technical expertise, the team is also highly responsive and supportive. They answered all my questions promptly and provided clear guidance every step of the way. I would highly recommend Chen Immigration Law Firm to anyone looking for top-notch service.”

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Success Story: NIW Petition Approved for PhD Student from China with Our Help from Expert Teams

“Wegreen is highly efficient and responsive.”

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Success Stories: Swift I-140 NIW Approval for a Biomedical Informatics PhD Student from China in Just 1 Month and 18 Days, Thanks to the Premium Processing

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Success Story: NIW Approved for MRI Researcher Enhancing Imaging Speed, Resolution, and Safety

“Working with Chen Immigration was a smooth and professional experience. Their team clearly understood the value of my research and presented it effectively in the petition.
 
They were organized, responsive, and skilled at translating technical work into a strong case for national benefit. Thanks to their guidance, my NIW petition was approved under standard processing. I highly recommend NAILG to any researcher pursuing this path.”

Approved in 480 days

State of Residence: California

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Success Story: NAILG Secure Fast-Track NIW Approval for an Indian Staff Research Scientist with Direct Premium Processing

“That is great news! Thank you for sharing this update and thank you again for all your work. I appreciate the competence of the staff and their promptness in answering all of my questions.”

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Success Story: NIW Approved! Iranian Full Professor in E-Commerce Field Achieves Success with Our Support

“Thank you so much for this fantastic news and all of your team’s hard work for my case.”

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Success Stories: NAILG Secured EB-1A Approval for an Assistant Professor in the Field of Medical and Public Policy After Prior NIW Success

“Thanks for your services.”

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Success Stories: From Algorithms to Acclaim — Computer Vision Scientist Secures O-1A Visa Approval

“Thank you for your excellent support on both my EB2-NIW and O1A petitions. I am very happy with your service and would be glad to leave a 5-star review. Thanks again for everything!”

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Success Stories: Premium Processing Accelerates EB2-NIW Approval for a Biotechnology Postdoctoral Associate from India

“I would like to express my deepest gratitude to the entire team at North America Immigration Law Group (NAILG) for their outstanding support and expert guidance throughout my EB2-NIW petition process. NAILG far exceeded my expectations in every regard.
 
From our first interaction, the team was highly organized, communicative, and deeply knowledgeable. They took the time to carefully assess my academic and research profile and provided a realistic and transparent evaluation of my case. 
 
What I especially appreciated was how effectively NAILG translated complex scientific findings into accessible, persuasive language suitable for USCIS officers. Their legal writing was sharp, evidence-based, and strategic. The process from document collection to final petition submission was smooth, well-structured, and always on schedule.
 
I wholeheartedly recommend NAILG to any researcher or professional navigating the EB2-NIW process. Their team combines legal precision with a genuine commitment to their clients’ success. Choosing them was one of the best decisions I made in my immigration journey, and I am sincerely thankful for their support.”

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State of Residence: Massachusetts

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Success Stories: Internal Medicine Assistant Professor Earned NIW for Precision-Focused Research with Help from NAILG

“I am currently working with Chen Immigration on my I-140 EB2-NIW petition, and I have been very impressed with their professionalism and expertise so far. My attorney has been incredibly thorough, responsive, and thoughtful throughout the entire process. They helped me carefully prepare my petition and provided detailed guidance at every step, making a complex process feel much more manageable. I highly recommend Chen Immigration to anyone looking for a dedicated and knowledgeable team to assist with their immigration journey.”

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Success Stories: From Swift NIW to EB-1A: NAILG Guided Research Assistant Professor in Electrical Engineering to Dual Approvals

“Thank you for the extraordinary services which led to the successful approval of my EB1A petition. I am truly grateful.”

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