EXPERT OPINION LETTERS
Expert Opinion Letters for
U.S. Immigration
Case-specific expert opinions prepared by qualified academic and industry professionals across specialized fields.
We support expert opinion letters for H-1B, EB-2 NIW, EB-1, O-1, L-1, PERM, P visas, and other specialized immigration matters.
Pricing starts at
$599
Standard and Premium expert tiers available
Both tiers consist of highly qualified experts.
Expedited turnaround
Options may be available depending on the case and expert selection.
A Case-Specific Opinion, Quoted After Review
An expert opinion letter is a written analysis prepared and signed by a qualified academic or industry expert in the field your case concerns. You identify the opinion you need based on your immigration matter, then submit your case details and supporting documents. Our team reviews the request and recommends the appropriate expert option and turnaround before final pricing is confirmed.
Expert Opinion Letters by Visa Type
Different immigration matters call for different types of opinions. Find the letter your case needs below.
H-1B Expert Opinion Letters
Specialty occupation petitions
- Specialty Occupation Opinion
- Wage Level / Level 1 Wage Opinion
- Academic + Work Experience Opinion
EB-2 NIW Expert Opinion Letters
National Interest Waiver petitions
- Advanced Degree Opinion
- Exceptional Ability Opinion
- Advanced Degree + Exceptional Ability Hybrid Opinion
EB-1 Expert Opinion Letters
First-preference employment-based petitions
- EB-1A — Extraordinary Ability
- EB-1B — Outstanding Professor / Researcher
- EB-1C — Multinational Manager / Executive
O-1 Expert Opinion Letters
Extraordinary ability and achievement petitions
- O-1A — Extraordinary Ability
- O-1B — Extraordinary Ability / Achievement in the Arts
- O-1 Advisory Opinion Letter (AOL)
L-1 Expert Opinion Letters
Intracompany transferee petitions
- L-1A — Managerial / Executive Capacity
- L-1B — Specialized Knowledge
PERM & Labor Certification
Labor certification matters
- PERM Audit / Expert Opinion
- Other specialized PERM opinions as applicable
P Visa Expert Opinion Letters
Athletes, entertainers, and performers
- P-1 and other applicable P visa matters
Other Immigration Services
TN and other specialized matters
- TN — Academic Credential Evaluation
- TN — Work Experience Evaluation
- Other specialized services as applicable
Pricing is based on the case requirements, turnaround, and expert tier—not on the visa category alone. Pricing starts at $599.
OUR EXPERT NETWORK
Specialized
Fields
Covered by Our Experts
Qualified academic and industry experts selected based on their relevant academic, professional, research, and/or subject-matter background.
ENGINEERING & TECHNOLOGY
Business Information Systems
BUSINESS, FINANCE & HR
Compensation & HR Analytics
HEALTH & LIFE SCIENCES
Dental Public Health
BUSINESS, FINANCE & HR
Economics
BUSINESS, FINANCE & HR
Fashion Business
HEALTH & LIFE SCIENCES
Forensic Psychology
BUSINESS, FINANCE & HR
Human Resource Management
ENGINEERING & TECHNOLOGY
Information Technology
ENGINEERING & TECHNOLOGY
Machine Learning
ENGINEERING & TECHNOLOGY
Mechanical Engineering
COMMUNICATION, ARTS & EDUCATION
Music Education
HEALTH & LIFE SCIENCES
Otolaryngology (ENT)
COMMUNICATION, ARTS & EDUCATION
Platform Governance
AVIATION
Quality Systems
BUSINESS, FINANCE & HR
Sports Business
LAW & PUBLIC POLICY
Vaccine Law
ENGINEERING & TECHNOLOGY
Biomedical Engineering
LAW & PUBLIC POLICY
Civil Rights
BUSINESS, FINANCE & HR
Decision Science
COMMUNICATION, ARTS & EDUCATION
Digital Media
ENGINEERING & TECHNOLOGY
Environmental Engineering
BUSINESS, FINANCE & HR
Finance
LAW & PUBLIC POLICY
Health Law
HEALTH & LIFE SCIENCES
Infectious Disease
HEALTH & LIFE SCIENCES
Kinesiology
BUSINESS, FINANCE & HR
Marketing
HEALTH & LIFE SCIENCES
Mental Health
HEALTH & LIFE SCIENCES
Nursing
HEALTH & LIFE SCIENCES
Physical Therapy
HEALTH & LIFE SCIENCES
Psychology
BUSINESS, FINANCE & HR
Risk Management
ENGINEERING & TECHNOLOGY
Structural Engineering
Other specialized
fields
upon request
BUSINESS, FINANCE & HR
Accounting
AGRICULTURE & FOOD SCIENCE
Agricultural Economics
ENGINEERING & TECHNOLOGY
Artificial Intelligence
HEALTH & LIFE SCIENCES
Behavioral Health
HEALTH & LIFE SCIENCES
Chemistry
ENGINEERING & TECHNOLOGY
Computer Science
HEALTH & LIFE SCIENCES
Dentistry
COMMUNICATION, ARTS & EDUCATION
Education Research
LAW & PUBLIC POLICY
FDA Law
ENGINEERING & TECHNOLOGY
Generative AI
LAW & PUBLIC POLICY
Immigration Law
LAW & PUBLIC POLICY
Intellectual Property
BUSINESS, FINANCE & HR
Management
HEALTH & LIFE SCIENCES
Medical Education
ENGINEERING & TECHNOLOGY
Neuroengineering
HEALTH & LIFE SCIENCES
Pediatric Dentistry
COMMUNICATION, ARTS & EDUCATION
Political Communication
BUSINESS, FINANCE & HR
Quantitative Marketing
HEALTH & LIFE SCIENCES
Sports Medicine
HEALTH & LIFE SCIENCES
Veterinary Medicine
AVIATION
Aeronautics
ENGINEERING & TECHNOLOGY
Architecture
AVIATION
Aviation Safety & SMS
BUSINESS, FINANCE & HR
Business Administration
HEALTH & LIFE SCIENCES
Clinical Psychology
HEALTH & LIFE SCIENCES
Dental Hygiene
BUSINESS, FINANCE & HR
E-Commerce
HEALTH & LIFE SCIENCES
Epidemiology
AGRICULTURE & FOOD SCIENCE
Food Science
BUSINESS, FINANCE & HR
Hospitality Management
ENGINEERING & TECHNOLOGY
Information Science
LAW & PUBLIC POLICY
Labor Policy
ENGINEERING & TECHNOLOGY
Mathematics
COMMUNICATION, ARTS & EDUCATION
Music
AGRICULTURE & FOOD SCIENCE
Nutrition
AVIATION
Pilot Training
HEALTH & LIFE SCIENCES
Public Health
HEALTH & LIFE SCIENCES
Social Work
BUSINESS, FINANCE & HR
Supply Chain & Logistics
BUSINESS, FINANCE & HR
Actuarial Science
AGRICULTURE & FOOD SCIENCE
Agriculture
AVIATION
Aviation
HEALTH & LIFE SCIENCES
Biology & Physiology
ENGINEERING & TECHNOLOGY
Civil Engineering
ENGINEERING & TECHNOLOGY
Data Analytics
BUSINESS, FINANCE & HR
Digital Marketing
ENGINEERING & TECHNOLOGY
Electrical Engineering
COMMUNICATION, ARTS & EDUCATION
Film & Cinematic Arts
COMMUNICATION, ARTS & EDUCATION
Health & Physical Education
BUSINESS, FINANCE & HR
Industrial-Organizational Psychology
COMMUNICATION, ARTS & EDUCATION
Journalism
ENGINEERING & TECHNOLOGY
Manufacturing
HEALTH & LIFE SCIENCES
Medicine
HEALTH & LIFE SCIENCES
Neuroscience
HEALTH & LIFE SCIENCES
Pharmacology
ENGINEERING & TECHNOLOGY
Programming
HEALTH & LIFE SCIENCES
Rehabilitation Science
HEALTH & LIFE SCIENCES
Sports Science
ENGINEERING & TECHNOLOGY
Water Resources
Every Letter Includes
Case-Specific Letter
An expert opinion letter prepared for your case
One Round of Revisions
Included with every letter
Attorney-Ready
Signed final PDF with the expert's CV
Flexible Turnaround
Expedited options may be available
How Expert Matching Works
Submit the case
Provide the client's background, proposed endeavor, supporting documents, and type of expert opinion needed.
GCS review
GCS reviews the matter and identifies the relevant field and service requirements.
Quote recommendation
GCS recommends the appropriate expert tier and turnaround based on the case.
Engagement & expert matching
Once engaged, GCS provides the appropriate expert match and coordinates the letter process.
Receive the letter
Receive the completed, signed, attorney-ready PDF with the expert's CV.
PRICING STARTS AT
$599
Pricing is based on the case requirements, turnaround, and expert tier—not on the visa category alone. Exact pricing is confirmed after we review your case.
Standard Expert Tier
Qualified academic and industry experts selected based on their relevant academic, professional, research, and/or subject-matter background.
- Case-specific expert opinion letter
- One round of revisions
- Attorney-ready final document
Premium Expert Tier
A premium expert option for clients seeking an expert with a particularly distinguished research, publication, academic, or professional profile.
- Case-specific expert opinion letter
- One round of revisions
- Attorney-ready final document
Both tiers consist of highly qualified experts. The Premium tier reflects the depth and distinction of the expert's profile; it does not mean that Standard-tier experts are less qualified or unsuitable for immigration matters.
Expedited turnaround options may be available depending on the case and expert selection.
Get a Quote Based on Your Case
Submit your case details and supporting documents, and our team will review your request and recommend the appropriate expert option and turnaround for your case.
- Client background and proposed endeavor
- Visa category and type of expert opinion needed
- Supporting documents (CV, degrees, job description, petition materials)
- Preferred turnaround
Final pricing is presented after we review your documents, so the quote reflects your case requirements, expert selection, and turnaround needs.
Request a Quote
Frequently Asked Questions
No. The visa category identifies the type of opinion needed, but exact pricing is determined after review based on case requirements, turnaround, and expert tier.
Both tiers consist of qualified experts. Premium is intended for clients seeking an expert with a more distinguished research, publication, academic, or professional profile.
Yes. Provide the case details and requested field, and GCS will help identify an appropriate expert match.
A case-specific expert opinion letter, one round of revisions, and an attorney-ready final document.
One round of revisions is included with every letter.
Expedited turnaround options may be available depending on the case and expert availability. Exact turnaround and pricing are confirmed after review.