Success Stories: Post-doctoral Research Assistant in the Field of Mechanical Engineering Received NIW and O1 Approval


Client’s Testimonial:

“Thank you for your time and effort spent on my case.”

On November 15th, 2019 and December 4th, 2019, we received another NIW (National Interest Waiver) and O1-A (Individual with extraordinary ability or achievement) approval for a Post-doctoral Research Assistant in the Field of Mechanical Engineering (Approval Notice).

General Field: Mechanical Engineering

Position at the Time of Case Filing: Post-doctoral Research Assistant

Country of Origin: China

State of Residence at the Time of Filing: Indiana

Approval Notice Date: November 15th, 2019 (NIW) & December 4th, 2019 (O1-A)

Processing Time: 5 months, 16 days (NIW) and 9 days (O1-A, PP requested)

Case Summary:

A postdoctoral research assistant from China hired North America Immigration Law Group ( to build a customized NIW (National Interest Waiver) petition for him. When we are eagerly waiting for a decision on his NIW, our client reached out to us again to evaluate his credentials for the nonimmigrant visa O-1A. Once we carefully examined his credentials, we were assured that our client had the right set of qualifications to be considered for an O1-A petition. To qualify for an O-1 visa, the beneficiary must demonstrate extraordinary ability by sustained national or international acclaim and must be temporarily in the United States to continue work in the area of extraordinary ability. As O1-A is an employer-sponsored visa category, our client could not self-petition and needed his employer’s full support before hiring us. Once we received confirmation from our client and his employer, our team went on to build a strong case again for him. Since our client opted for Premium Processing (PP), his case was approved in only 9 days.

Perhaps the most important element of both petitions had to do with our client’s research. We carefully reviewed his research summary and detailed his work on the durability and strength of composite materials. We demonstrated to the USCIS that our client’s work in this area is of great importance because his research addresses some of our nation’s most pressing issues in understanding the safest and most effective use of building and manufacturing materials.

Apart from completing successful research in the field, our client has also published 8 peer-reviewed scientific articles and 11 conference proceeding articles that collected 104 citations by the time when we were ready to file his case; thereby demonstrating that these publications are widely recognized and relied upon in the field of mechanical engineering. He has also conducted 37 reviews for distinguished journals and conferences. The fact that his papers being published in the top journals and that his peers leveraged his research demonstrated that our client’s work is widely recognized and relied upon in his field.

4 letters of recommendation were included into the petition packet in support of client’s case. One of the recommenders stated: “His education has laid a solid foundation for him to be a leader in his field, and he has repeatedly demonstrated his exceptional abilities as a researcher.”

We congratulate our client for obtaining not one, but two approval notices, and we thank him for choosing North America Immigration Group (NAILG) to represent his NIW and O1-A petitions. We wish him the best as he continues his valuable work here in the United States.

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 16,000 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 approved cases grew from 600 in 2013 to over 3,500 in 2019.

If you are interested in filing the green card, please send your CV to for our free evaluation. Our attorneys will email you back with the evaluation result within 24 hours.

Approval Notices:

Success Stories:


Free evaluation email:

Tel: 888.666.0969 (Toll Free)

To see more clients’ testimonials and approvals, please refer to:

Client's Testimonials

Approval Notices

To Learn More About Your Options CLICK HERE

Copyright © North America Immigration Law, All Rights Reserved.