Founded by Kenneth Kim, CPA, Simon Yoo, CPA, and Kevin Jang, CPA, KYJ, LLP is now known as one of the major regional Korean-American CPA firms in Southern California. Its services, however, are not territorially limited to Southern California; KYJ renders services across the continent of the United States, providing the one-stop professional services in accounting, auditing, tax, management consulting, and many other.

The firm's clients range from small retail stores to multi-national corporations. One expertise among many is in the Maquiladora industry. The firm has been offering satisfactory service to clients who operate their businesses collectively in the United States, Mexico, and Korea. With its successful business relationship with leading businesses in the community, KYJ, LLP has built a reputation as a firm capable of handling large scale assignments in highly specialized areas.