

Los Angeles
SERVICE FOCUS
Bar Admission
California
P.R.China
Language
English
Mandarin Chinese
Academic
• LL.M., University of Southern California
• LL.M., Tongji University
• LL.B., East China Institute of Technology
Ou (Anna) Sun
Partner
Head of Immigration
Anna is the Partner and Head of Immigration at ILS, leveraging over a decade of experience in business immigration, business transactions, and foreign investment to deliver strategic, client-focused legal solutions across diverse industries.
Anna provides comprehensive guidance to global employers on all aspects of U.S. business immigration, with a proven record of helping companies recruit and retain foreign national executives and highly skilled professionals vital to their U.S. operations. Her practice covers the full range of employment-based immigration matters, serving clients from innovative technology startups to established leaders in autonomous driving, biotech, telecommunications, entertainment, gaming, logistics, and manufacturing.
Before joining ILS, Anna spent over eight years with leading global law firms, focusing on transactions, employment, foreign investment, and business immigration. She also held in-house counsel and compliance manager roles in the telecommunications, finance, and gaming industries for more than five years. These positions sharpened her ability to understand operational realities and deliver practical, results-oriented legal strategies. Her unique combination of private practice, corporate compliance, and in-house experience enables her to develop tailored solutions that balance legal precision with business pragmatism.
Anna’s diverse background and cross-industry expertise make her both a trusted legal advisor and a strategic business partner. Whether guiding multinationals through complex immigration processes or structuring cross-border transactions, she is dedicated to delivering solutions that drive her clients’ long-term success.
Representative Matters
• Achieved 99%+ approval rate across all visa categories.
• Provided strategic immigration planning and compliance guidance for high-complexity cases.
• Secured numerous work visas for new U.S. offices, facilitating smooth business expansion and operations nationwide.
• Successfully appealed multiple denial decisions, achieving favorable outcomes.
• Overcame RFE challenges with strong legal rebuttals, securing approvals in difficult cases.
• Pioneered recognition of VIE structures by USCIS, expanding beyond traditional equity frameworks and establishing precedent for non-conventional corporate arrangements.