Global Capabilities
Global perspective with focused Korea-U.S. execution.
JCK Yoonsung LLP serves U.S. and multinational businesses while maintaining a strategic relationship with Yoonsung Accounting Corporation in Korea.
How our cross-border platform works.
Our model is intentionally simple: JCK Yoonsung LLP leads U.S. audit, tax, accounting advisory, transaction advisory, and financial advisory services from the United States, while coordinating with Korean headquarters, group auditors, and local advisors when cross-border needs arise.
Yoonsung Accounting Corporation operates as an independent legal entity in Korea. Through a strategic alliance, we collaborate where appropriate to support communication, timing, and practical execution between U.S. teams and Korea-based stakeholders.
Relationship Map
Independent firms. Coordinated cross-border support.
JCK Yoonsung LLP
U.S. CPA and advisory firm
Audit • Tax • Advisory
Costa Mesa, CA 92626
Coordinated communication, cross-border reporting support, and practical execution for U.S. and Korea stakeholders.
Yoonsung Accounting Corporation
Independent Korean accounting firm
Seoul, KoreaYoonsung Accounting Corporation is an independent legal entity. The relationship is a strategic alliance designed to enhance service capabilities and global collaboration.
U.S. execution
Audit, tax, advisory, and reporting support led by U.S.-based professionals.
Headquarters communication
Support for communication with headquarters, management, advisors, and group auditors.
Accounting frameworks
Experience with U.S. GAAP, IFRS, K-IFRS, group reporting, and internal control expectations.
Global mindset
Designed for both domestic U.S. businesses and multinational organizations.