U.S. Immigration & Nationality Law
Guiding professionals through U.S. immigration for 25 years.
Based in Burlingame, California, the Law Offices of Warren K. Woo represents foreign investors, executives, technical professionals, students, and their families throughout the U.S. immigration process. The firm holds particular depth in Free Trade Agreement visas, including 20 years of experience with the H-1B1 program for Singaporean and Chilean nationals.
Mr. Woo brings a business-minded approach to immigration law, drawing on a background in economics to structure visa strategies for clients ranging from early-stage startups making their first international hire to established multinational corporations and research universities. His practice has particular depth serving companies and professionals across South and Southeast Asia.
Areas of Practice
Employment-Based Visas
From H-1B specialty occupation petitions to the H-1B1 program for Singaporean and Chilean nationals, TN and E-3 categories, and O-1 extraordinary ability and L-1 intracompany transfers, Mr. Woo structures visa strategies for startups and global enterprises alike.
Permanent Residency & Green Cards
Whether through labor certification, extraordinary ability, or multinational manager categories, the firm guides employers and employees through every stage of the green card process.
Family & Naturalization
The firm also assists dependent family members and individuals pursuing U.S. citizenship, guiding clients from initial visa status through naturalization.
Full Practice Areas
H-1B Temporary Worker — Professional/Specialty Occupation
H-1B1 (Singapore/Chile), TN (Canada/Mexico), & E-3 (Australia)
O-1A & O-1B — Individuals with Extraordinary Ability
L-1A/B Temporary Worker — Intracompany Transferee
J-1 Exchange Trainee/Intern
Green Card: Permanent Residence (Employment-Based) — Labor Certification, Extraordinary Ability, Multinational Manager
Dependent Family Members (H-4, L-2, O-3, TD)
Naturalization (U.S. Citizenship)