The Best Expert Opinion Letters Available
Built upon a bedrock of research, some of which is available on our blog.
On this page:
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What is an Expert Opinion Letter?
Learn more:
An Expert Opinion Letter from ProfVal can help you and your clients.
Every ProfVal Expert Opinion Letter is a research-backed document written by a distinguished expert. It's unique, just like you. Just like your clients.
At ProfVal, we know that every client’s story is different. That’s why we take the time to create letters that reflect your clients’ individual experiences, achievements, and goals, not one-size-fits-all templates.
Our Expert Opinion Letters have helped hundreds of attorneys support thousands of professionals - entrepreneurs, innovators, small business owners, and employees at startups, nonprofits, and Fortune 500 companies - across a wide range of visa types.
We do this work because your clients matter. And so do you.
Our process (at a glance).
On your end, it's designed to be easy. Look to the right.
Internally, we go through a detailed set of steps.
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Intake and Goals – We start by understanding your petition, visa criteria, and what USCIS needs to see.
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Attorney Collaboration – We incorporate your feedback and align the letter with your overall case strategy.
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Expert Match – We pair you with a distinguished expert whose background aligns with your client’s field.
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Evidence Review – We analyze your client’s background, role, and supporting documentation.
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Research & Framing – We connect the evidence to the visa criteria in clear, persuasive terms.
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Draft & Quality Review – Each letter undergoes rigorous internal review for clarity, accuracy, and compliance.
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Finalize & Deliver – You receive a polished, citation-supported letter—ready to include in your filing.
Types of Expert Opinion Letters
An Expert Opinion Letter from ProfVal for an EB-1 visa examines an individual's extraordinary ability credentials. Occasionally, attorneys request a NIW discussion (see EB-2 criteria)
An Expert Opinion Letter for an L-1A, L-1B, O, or visa requires a detailed analysis that varies based on your background and visa requirements.
An Expert Opinion Letter from ProfVal for an EB-2 visa focuses on exceptional ability, typically with an emphasis on the National Interest of an endeavor (EB-2, NIW).
Also called a "Specialty Occupation Expert Opinion Letter", an H1B Expert Opinion Letter addresses USCIS specialty occupation concerns related to the position, the beneficiary, or both
An H-3 Expert Opinion Letter from ProfVal will address USCIS H-3 requirements related to a training program in the United States and the qualifications of the noncitizen beneficiary hoping to attend it.
A Work Experience Expert Opinion Letter examines how your work experience corresponds to the academic requirements of a U.S. academic degree.
In depth: some of the rationale behind our approach
An Expert Opinion Letter from ProfVal can enhance the evidentiary strength of a visa petition at any procedural stage, including the initial filing, a Request for Evidence (RFE), or an appeal following a denial.
To appreciate its value, it helps to adopt the analytical perspective of a USCIS adjudicator. Each officer’s task is to determine whether the evidence presented demonstrates that the petitioner meets the statutory and regulatory criteria for the requested classification. In doing so, adjudicators exercise considerable discretion, interpreting the quality, relevance, and credibility of the documentation submitted.
Importantly, USCIS officers arrive at their roles through diverse professional and educational pathways. Some possess backgrounds in law, political science, or public administration; others may have prior experience in the military, the Peace Corps, or the nonprofit sector.
Their worldviews and disciplinary orientations vary widely. Yet each officer encounters your petition - and your client’s narrative - for the first time, often without deep familiarity with the petitioner’s field or the norms of that professional domain.
This variability in background and context means that an adjudicator may not immediately grasp the technical, organizational, or disciplinary nuances embedded in your client’s work. When this nuance is lacking, the officer may issue an RFE to solicit additional evidence clarifying how the petitioner’s qualifications or proposed endeavor align with the statutory definitions relevant to the visa category.
An Expert Opinion Letter from ProfVal addresses this challenge directly. Our letters incorporate deep research related to your clients' endeavor. We use an approach that has supported hundreds of attorneys and thousands of petitioners. Based on feedback from attorneys, our study of thousands of RFEs and Denials (clients come to us post-RFE or Denial), we constantly adapt our approach based on changing trends (see example).
This leads to an authentic Expert Opinion Letter, representing a synthesis of domain-specific knowledge and regulatory criteria into a coherent, research-based argument that situates your client’s expertise within an appropriate professional and theoretical framework.
Each letter is developed through a rigorous process of expert consultation, document review, and cross-referencing with the applicable standards of adjudication. Written in professional yet accessible language, the letter functions as both an evidentiary artifact and an interpretive bridge. Thus, each Expert Opinion Letter uniquely translates complex content into terms that a non-specialist adjudicator can understand and evaluate.
Every ProfVal Expert Opinion Letter is uniquely composed, grounded in the specific facts of the case and the relevant body of knowledge. We invest this level of precision because evidence matters, and so do the people whose futures depend on it.
