# PhD Green Card

> PhD Green Card provides U.S. employment-based immigration information for researchers, professors, scientists, scholars, and other professionals, with detailed guidance on EB-1A extraordinary ability, EB-1B outstanding professor or researcher, and EB-2 National Interest Waiver petitions.

This site is associated with Messersmith Law Firm and contains attorney-authored immigration information, evidence guidance, case-result information, and explanations of U.S. Citizenship and Immigration Services standards. Content is provided for general informational purposes and is not legal advice. For current legal standards or government procedures, consult the primary government sources cited within the linked pages.

## Start Here

- [PhD Green Card](https://phdgreencard.com/): Main research-focused employment immigration resource.
- [About Us](https://phdgreencard.com/about-us/): Information about the law firm, attorney experience, and the site.
- [Approved Cases](https://phdgreencard.com/approved-cases/): Examples of approved immigration matters and case-result information.
- [Processing Times](https://phdgreencard.com/processing-times/): Current processing-time guidance and related considerations.

## EB-1A Extraordinary Ability

- [EB-1A for Researchers](https://phdgreencard.com/eb1a-for-researchers/): Overview of EB-1A strategy and evidence for researchers.
- [EB-1A for PhD Holders](https://phdgreencard.com/eb1a-for-phd-holders/): How a PhD fits into an EB-1A petition and what additional evidence is needed.
- [EB-1A Without a PhD](https://phdgreencard.com/eb1a-without-phd/): EB-1A eligibility and evidence without a doctoral degree.
- [EB-1A Original Contributions](https://phdgreencard.com/eb1a-original-contributions/): Evidence for original contributions of major significance.
- [EB-1A Peer Review and Judging](https://phdgreencard.com/eb1a-peer-review-judging/): Evidence of judging the work of others.
- [EB-1A Scholarly Authorship](https://phdgreencard.com/eb1a-scholarly-authorship/): Scholarly article authorship evidence.
- [EB-1A Published Material](https://phdgreencard.com/eb1a-published-material/): Published material about the petitioner.
- [EB-1A High Salary](https://phdgreencard.com/eb1a-high-salary-researchers/): High-remuneration evidence for researchers.
- [EB-1A Recommendation Letters](https://phdgreencard.com/eb1a-recommendation-letters/): Role and preparation of expert recommendation letters.
- [EB-1A Citation Evidence](https://phdgreencard.com/eb1a-citation-evidence/): How citation evidence may support an extraordinary-ability petition.
- [EB-1A vs. EB-1B](https://phdgreencard.com/eb1a-vs-eb1b-researchers/): Comparison of EB-1A and EB-1B for researchers.

## EB-1B Outstanding Professors and Researchers

- [EB-1B for Researchers](https://phdgreencard.com/eb1b-for-researchers/): Overview of EB-1B requirements and evidence.
- [Outstanding Researcher Classification](https://phdgreencard.com/eb1-outstanding-researcher/): Detailed discussion of the outstanding researcher category.
- [EB-1B Employer Requirements](https://phdgreencard.com/eb1b-employer-requirements/): Employer-side eligibility requirements.
- [EB-1B Private Employer Requirements](https://phdgreencard.com/eb1b-private-employer-requirements/): Requirements applicable to qualifying private employers.
- [EB-1B Permanent Research Position](https://phdgreencard.com/eb1b-permanent-research-position/): Permanent-position requirement and related evidence.
- [Three Years of Research Experience](https://phdgreencard.com/eb1b-three-years-research-experience/): EB-1B research-experience requirement.
- [EB-1B Citation Requirements](https://phdgreencard.com/eb1b-citation-requirements/): How citation evidence relates to EB-1B.
- [EB-1B Recommendation Letters](https://phdgreencard.com/eb1b-recommendation-letters/): Expert letters in EB-1B petitions.
- [EB-1B RFEs](https://phdgreencard.com/eb1b-rfe/): Requests for Evidence in outstanding professor or researcher cases.
- [EB-1B vs. NIW](https://phdgreencard.com/eb1b-vs-niw-researchers/): Comparison of EB-1B and National Interest Waiver strategies.

## EB-2 National Interest Waiver

- [NIW for Researchers](https://phdgreencard.com/niw-for-researchers/): Overview of National Interest Waiver strategy for researchers.
- [EB-2 National Interest Waiver](https://phdgreencard.com/eb2-national-interest-waiver-niw/): General NIW requirements and framework.
- [NIW National Importance](https://phdgreencard.com/niw-national-importance/): Evidence addressing national importance.
- [NIW Well Positioned](https://phdgreencard.com/niw-well-positioned/): Evidence that a petitioner is well positioned to advance the proposed endeavor.
- [NIW Third Prong](https://phdgreencard.com/niw-third-prong/): Balancing analysis under the third Dhanasar prong.
- [NIW Citation Requirements](https://phdgreencard.com/niw-citation-requirements/): Role and limitations of citation evidence in NIW cases.
- [NIW RFEs for Researchers](https://phdgreencard.com/niw-rfe-researchers/): Common NIW RFE issues for researchers.
- [NIW for Professors](https://phdgreencard.com/niw-for-professors/): NIW considerations for professors and academics.

## Research and Evidence

- [Peer Review as Immigration Evidence](https://phdgreencard.com/peer-review-immigration-evidence/): How peer-review service can be documented and evaluated.
- [Research Impact Beyond Citations](https://phdgreencard.com/research-impact-beyond-citations/): Evidence of research impact beyond citation counts.
- [How USCIS Evaluates Citations](https://phdgreencard.com/how-uscis-evaluates-citations/): Context for citation evidence in immigration adjudications.
- [H-Index in Immigration Petitions](https://phdgreencard.com/h-index-immigration-petitions/): Use and limitations of the h-index as immigration evidence.
- [Journal Impact Factor](https://phdgreencard.com/journal-impact-factor-immigration/): How journal impact factor may be used as contextual evidence.

## Optional

- [Contact](https://phdgreencard.com/contact-us/): Contact information for the law firm.