PhD-level expert opinion letters for every major employment-based visa category.
Evaluation World provides expert opinion letters written by PhD-level professors and industry specialists from our network of 170+ experts across 50+ fields. Each letter is custom-written by an independent authority matched to your specific discipline, providing the objective, evidence-based analysis USCIS requires.
Whether you're filing an initial petition, responding to an RFE, or appealing a denial, our expert opinion letters strengthen your case with independent validation from a credentialed authority in your field.
Each visa type has different evidentiary requirements. Our experts tailor every letter to the specific legal framework your petition requires.
National Interest Waiver — Matter of Dhanasar three-prong framework. For professionals demonstrating that their work serves the national interest.
Learn More →10 criteria threshold plus final merits determination. For individuals with sustained national or international acclaim at the very top of their field.
Learn More →Extraordinary ability in sciences, business, arts, or athletics. O-1A and O-1B. Advisory opinion letters included.
Learn More →Specialty occupation analysis, degree equivalency, work experience evaluation, and RFE defense for H-1B visa petitions.
Learn More →Managerial/executive capacity (L-1A) and specialized knowledge (L-1B) analysis for intracompany transfer petitions.
Learn More →Received an RFE or denial? Our targeted expert opinion letters directly address every USCIS concern. Rush delivery available.
Get Urgent Help →Each field has different Dhanasar arguments. Our field-specific pages explain exactly how we build the national importance case for your discipline.
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