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:

Choosing the Right Immigration Law Firm Matters More Than Ever
In the current immigration landscape, approval outcomes for NIW, EB-1, and O-1 petitions are increasingly shaped by shifting adjudication standards, heightened scrutiny, and evolving policy interpretations. Under these conditions, the law firm you work with is not simply a service provider. Rather, it becomes a critical strategic partner in assessing risk, framing evidence, and positioning your case effectively.

Many immigration law firms continue to rely on rigid internal policies, standardized support-letter requirements, or fixed drafting templates. While such approaches may simplify internal workflows, they often fail to account for how USCIS officers actually evaluate cases in practice, particularly in borderline, interdisciplinary, or non-traditional profiles.

At North America Immigration Law Group (Chen Immigration Law Associates), we take a fundamentally different, data-driven approach. Our strategy is informed by analysis of nearly 64,000 approved cases across NIW, EB-1, and O-1 categories, allowing us to identify adjudication patterns, evidentiary gaps, and effective framing strategies as standards evolve.

Rather than fitting cases into pre-set templates, we apply a customized drafting methodology that integrates historical approval data, current adjudication trends, and each client’s unique professional trajectory. This approach enables us to craft petitions that are not only well-written, but strategically aligned with how USCIS evaluates national interest, extraordinary ability, and sustained impact today.

64,000 Approvals: Data-Informed Insight into USCIS Adjudication Trends
With nearly 64,000 approved cases across the EB-1A, EB-1B, EB-2 NIW, and O-1 categories, our work provides a unique, data-informed perspective on how USCIS evaluates employment-based immigration petitions in practice.

As adjudication standards continue to evolve, historical approval outcomes offer critical insight into how evidentiary thresholds, framing expectations, and discretionary analysis shift over time. By systematically analyzing patterns across thousands of successful cases, we are able to identify emerging trends and anticipate areas of heightened scrutiny.

At North America Immigration Law Group (Chen Immigration Law Associates), this depth of case data informs not only how petitions are drafted, but how strategies are adjusted in real time. This ensures that each case is positioned in alignment with current USCIS adjudication rather than static assumptions.

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.

The "Anti-Template" Philosophy

We Draft for Today's USCIS, Not Yesterday's
U.S. immigration adjudication is inherently dynamic. Standards, evidentiary expectations, and areas of scrutiny evolve continuously, and arguments that were persuasive months ago may no longer be sufficient under current review practices. Because we file a high volume of employment-based petitions each year, we are able to identify shifts in USCIS adjudication at an early stage. These shifts may include increased scrutiny of specific fields, changes in how national importance is interpreted, or higher expectations for evidentiary specificity.

At North America Immigration Law Group (Chen Immigration Law Associates), our drafting process begins with an assessment of how cases are being adjudicated today, not how they were approved in the past. Rather than relying on static language or pre-set formats, each petition letter is developed through case-specific legal analysis to ensure that the client’s background is framed in alignment with current adjudication trends.


Why Customization Matters for "National Importance"
One of the most common grounds for NIW denial is a failure to clearly establish national importance. Broad or generalized assertions of importance, without precise linkage to U.S. priorities, are increasingly insufficient. Therefore, effective petitions must go beyond generic descriptions. Each case is framed to connect the client’s specific research, technical expertise, or business activities to concrete national needs, such as artificial intelligence leadership, public health advancement, or supply chain resilience.

Drawing on insights from recent approvals, we construct arguments that reflect how USCIS officers are currently evaluating national impact. These arguments rely on specific and technical examples rather than abstract or conclusory statements.


Tailored Argument Construction
Each case is evaluated as an integrated legal record, not simply as a collection of credentials. A dedicated attorney reviews the client’s publication record, funding history, professional trajectory, and real-world impact to develop a cohesive legal narrative tailored to the case. This from-scratch analytical approach allows us, in appropriate cases, to rely on the strength of the legal argument itself. By grounding the petition in detailed analysis and current adjudication standards, the case is positioned to stand on its own legal merits.

Proven Results in a Heightened Adjudication Climate
In the current immigration adjudication climate, where USCIS scrutiny has increased across employment-based categories, measurable outcomes matter. While many firms reference "high success rates" in general terms, few provide verifiable, case-volume–backed data that allows prospective clients to understand performance in context. At North America Immigration Law Group (Chen Immigration Law Associates), we take a transparent, data-driven approach to evaluating outcomes. Under our Approval or Refund® service, between January 2012 and December 2025, the firm achieved an overall success rate of 98% across 52,753 cases.

This performance spans multiple employment-based immigrant visa categories:

  • EB-2 NIW: 99% approval rate, based on 42,047 approvals
  • EB-1A: 91% approval rate, based on 9,218 approvals
  • EB-1B: 98% approval rate, based on 1,488 approvals
These results are particularly notable given the increasingly rigorous review standards applied by USCIS during this period, especially for industry-based NIW petitions where national importance and independent impact are closely examined.

Rather than relying on generalized claims, we publish detailed, verifiable approval data to provide clients with a clear understanding of what has been achieved in practice. This commitment to transparency reflects how we approach case strategy more broadly: with evidence, accountability, and a focus on outcomes that withstand heightened adjudication scrutiny.

Track Record of Success EB-1 and NIW Approvals

(2012.01 - 2025.12)
Approval or Refund®
Category Approval or RefilingTM
Approved Sum Success Rate Approved Sum Success Rate
NIW 42,047 99% 5,258 97%
EB1A 9,218 91% 4,534 86%
EB1B 1,488 98% 448 93%
Total 52,753 98% 10,240 92%

Client Testimonials

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

2 years ago when I googled saying 'Best immigration lawyer for NIW' - It showed up Chen immigration on top of the list at Yelp. I decided to work with Chen immigration firm and now I am highly satisfied with my decision.
My EB2-NIW application has been approved after 13 months. Chen immigration helped me to submit this application. I am very much impressed the way they prepare my application for this category. They are very professional ! I have already recommended dozen of my friends to Chen immigration and will highly recommend to all those who are currently looking for immigration lawyer in USA.

- M. S., Postdoctoral Research Associate

My I-140 petition under NIW category got approved. I have a phd in mechanical engineering and was a postdoctoral fellow at the time of submitting my petition. I would like to thank Chen Immigration Team in drafting the petition and recommendation letters. I am impressed by their professionalism, their willingness to respond to any question in a timely manner and their dedication in emphasizing every aspect of my work and research. I would not be able to draft such an assuring petition letter myself. I am so grateful to have Chen Immigration Team as my attorney. I highly recommend Chen immigration law group. Thank you so much.

- V. V.

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 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

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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NIW Practice Comparison
North America Immigration Law Group vs. Other Immigration Law Firms
Legal Strategy
Drafting Method
Adjudication Insight
Approval or Refund Policy
Post-Filing Defense
(RFE, NOID, NOIR, Appeal)
Speed and Service
  • Flexible and client-centric.
  • We build the legal strategy around each client.
  • Analyzes credentials and evidence for the safest, most effective approach.
  • Zero templates and tailored arguments.
  • Each Petition Letter is drafted from scratch.
  • Reflects the client’s work and current USCIS trends.
  • Officer-specific intelligence.
  • Nearly 64,000 approvals give us extensive data. 
  • Anticipates and proactively addresses officer concerns.
  • Transparent and client-protective.
  • If a qualifying case is denied, clients get a refund of attorney fees.
  • No need for re-filing.
  • Included at no extra cost.
  • We handle RFEs, NOIDs, NOIRs, and appeals to the AAO when needed.
  • We stand behind our clients and our strategies.
  • Optimized for efficiency.
  • 24-hour response standard
  • Over 90% of client inquiries answered within one business day.
Other Immigration Law Firms
  • Rigid one-size-fits-all approach
  • Forces clients into preset models like multiple recommendation letters or no-letter policies, regardless of needs.
  • Uses static templates.
  • Fill-in-the-blank forms that appear similar across many petitions.
  • Often misses technical nuance.
  • Reactive approach.
  • Waits for an RFE or denial to understand officer expectations.
  • Limited or restrictive.
  • Refunds may require denial twice or clients must re-file.
  • Often billed separately or not pursued.
  • Some firms charge extra fees for RFEs, NOIDs, or appeals.
  • Slow or rushed.
  • Responses may take several days.
  • Filings may be rushed without proper quality control.

Success Story: O1-A Approved in Just 17 Days! Custom Strategy Secures Win for A Chinese Post-Doctoral Fellow via Premium Processing

“Great. Thank you for all your effort.”

Approved in 17 days

State of Residence: South Carolina

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Success Stories: Collaborative Win: NAILG and Postdoctoral Research Associate in Materials Engineering Achieved NIW Approval

“I’m happy with the service. Thanks.”

Approved in 40 days

State of Residence: Utah

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Success Stories: NAILG Helped a Senior Advisor from India to Obtain NIW Approval in the Field of Computational Chemistry in 1 Month, 21 Days only

“Great news! Thank you for your support and guidance in this important process. The team was prompt and very diligent in preparing and reviewing the material and did a nice job explaining the expectations and best practices to help ensure the application is as smooth as possible.”

Approved in 51 days

State of Residence: Indiana

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Success Story: We Helped an Expert in Applied Entomology Secure NIW Approval with Confidence

“With the expert guidance of Chen Immigration Law Associates, I successfully obtained my EB-2 (NIW) approval (priority date: May 21, 2024, decision date: March 18, 2025). The firm’s deep understanding of the petition process, professionalism, and prompt responses made the entire experience smooth and efficient.
 
I am grateful to the Chen team for their outstanding support and highly recommend them to researchers and professionals seeking U.S. immigration under the NIW categories.”

Approved in 295 days

State of Residence: China

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Success Story: Senior Software Developer from China Achieves NIW Victory Through Our Assistance

“I was amazed by the professionalism and strategic approach of the legal team, which made the complex NIW process feel manageable and clear. Their expert guidance was instrumental in the successful approval of my case, and I am grateful for their invaluable assistance in achieving this goal.”

Approved in 295 days

State of Residence: New York

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Success Stories: A Dual Triumph in U.S. Immigration: Elevating Population Health Through Data and Digital Innovation

“Many thanks again for your professionalism and great help. I will definitely refer to my colleagues and friends. I would also like to specifically thank my attorney for his outstanding skills and help with my case. I really appreciate him.”

Approved in 69 days

State of Residence: Singapore

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Success Stories: Turning Data into Public Health Insight: EB2-NIW Approved for AI-Powered Health Researcher

“This is great news! I’d like to express my sincere thanks to the team and attorneys for all the help and support during this long process. Navigating the application could be intimidating at times. Your clear instructions and detailed feedback helped me immensely along the way.”

Approved in 200 days

State of Residence: Texas

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Success Story: From Neuroimmune Signals to National Impact — Dual I-140 Approvals for a Biomedical Innovator

“Thank you so much for your invaluable assistance in securing my approvals.”

Approved in 112 days

State of Residence: United Kingdom

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Success Story: O1-A Approved in Just 14 Days! A Postdoctoral Research Associate Secures Success with NAILG’s Team and Premium Processing

“Thank you so much for the wonderful news! It was a real pleasure working with you!”

Approved in 14 days

State of Residence: Illinois

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Success Story: NIW Success for Chinese Graduate Student – Approved with Our Tailored Strategy and Premium Processing

“It’s been a great experience working with your firm, and I really appreciate all the help along the way! The expertise and prompt responses are exceptional, definitely would recommend to anyone who is interested in applying for a green card!”

Approved in 44 days

State of Residence: Massachusetts

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Success Stories: Radiologist Secured NIW for Pioneering Research on Safer, Faster Imaging Techniques

“Thank you very much for your help and support from the free evaluation till my I-140 approval.”

Approved in 131 days

State of Residence: New York

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Success Stories: From ICU Data to Lifesaving Predictions: How One Researcher Is Using Algorithms to Revolutionize Critical Care

“Thank you for your great work and kind assistance throughout the process. The attorney is very helpful and prompt in response. Overall, it’s a satisfying experience!”

Approved in 45 days

State of Residence: United Kingdom

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Success Story: With Strategic Filing, Our Expert Team Assisted a China Associate Research Scientist Secure NIW Approval

“I’m so thankful to NAILG for helping me get my NIW petition approved. From the very beginning, they were patient and incredibly knowledgeable. I never felt alone in the process—they guided me step by step, answered all my questions quickly, and made everything feel manageable. I truly appreciate their hard work and care, and I wouldn’t have been able to do this without them.”

Approved in 476 days

State of Residence: New Jersey

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NIW Approved for Inorganic Chemist Advancing Rare-Earth Elements Extraction and Nuclear Waste Remediation

“Thank you so much!!! I really appreciate your help!”

Approved in 490 days

State of Residence: Michigan

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Success Stories: Medical Scientist from Nepal in Biomedical Science Secures EB2-NIW Approval, Overcoming RFE Challenge

“This is fantastic news! I want to extend my sincere thanks to your entire team for their outstanding assistance with my I-140 application and the subsequent I-140 RFE. I truly believe my case wouldn’t have been approved without the dedication and expertise of your professionals.”

Approved in 169 days

State of Residence: Florida

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