Client’s Testimonial:
“This is Excellent news !! Thank you SO MUCH for making my day !! I sincerely appreciate your hard work, dedication, and guidance throughout my I-140 NIW petition process. Thank you for all the effort you put into ensuring a smooth and successful outcome. Your support has been invaluable. I will be sure to recommend your firm to others who may benefit from your exceptional service. Thank you again for everything !! I am thrilled that my EB2-NIW petition was approved in less than 10 months without an RFE ! I am incredibly grateful to Chen Immigration Law Group (Wegreened) for their expertise, professionalism, and unwavering support throughout the process. Their clear guidance, attention to detail, and responsiveness made a significant difference in my case. Thanks to their diligent work, my Form I-140 was approved smoothly, and I couldn’t be happier. I highly recommend Chen Immigration Law Group (Wegreened) to anyone seeking expert immigration legal services. Thanks again Chen, for your exceptional service!”
On February 3rd, 2025, we received another EB-2 NIW (National Interest Waiver) approval for a Postdoctoral Researcher in the Field of Mathematics (Approval Notice).
General Field: Mathematics
Position at the Time of Case Filing: Postdoctoral Researcher
Country of Origin: Cameroon
State of Residence at the Time of Filing: Maryland
Approval Notice Date: February 3rd, 2025
Processing Time: 9 months, 27 days
Case Summary:
A postdoctoral researcher contacted our law firm for assistance in demonstrating his significant contributions to the United States through an NIW (National Interest Waiver) petition. We meticulously presented his exceptional professional background and unparalleled expertise, emphasizing their importance to his current and future work, as required by USCIS.
Upon reviewing his credentials, we found that our client holds a Ph.D. in mathematics and has built an impressive publication record. His research has resulted in:
- 5 peer-reviewed journal articles, 4 of which he authored as the first author. These papers have been published in some of the most selective, high-impact journals in the field of mathematics.
- 1 peer review for a notable journal, demonstrating his recognition as an expert in his field.
- 70 citations on Google Scholar, confirming that his work is widely recognized and frequently referenced by other scholars.
Furthermore, we presented his current and future research as focusing on the application of the Markov decision process to optimize decision-making and modeling problems, supporting real-world applications such as robotics and traffic light control systems. His work addresses some of the most pressing global challenges, including the development of sustainable environments and the reduction of economic burdens. Specifically, his computational techniques contribute to advancing renewable energy systems, mitigating the negative impacts of nonrenewable energy dependence, such as global warming. By integrating these tools, he fosters the rapid and efficient development of treatment strategies, ultimately benefiting both the U.S. economy and public health.
Our dedicated efforts effectively demonstrated to USCIS that our client’s outstanding background, strong record of achievements, recognition as a peer reviewer, and specialized expertise not only qualify him as an individual of exceptional ability but also prove that his contributions will substantially benefit the United States.
To further strengthen his petition, we included four recommendation letters from fellow experts in his field, each affirming the significance of his research and its impact.
We are pleased to congratulate him on securing NIW approval. Despite a relatively lengthy wait time, his petition was successfully approved in 9 months and 27 days. We hope he receives his green card soon and wish him continued success in his future endeavors.
North America Immigration Law Group (Chen Immigration Law Associates) 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.
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.

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