We – Song I Yoon and Heebong Park – are members of THECL Accounting Firm. 

THECL Accounting Firm was founded and registered at the Korean Institute of Certified Public Accountants (KICPA) in April 2016, with over 40 professionals operating out of four offices in Seoul, Korea. THECL is an assertive firm providing clients a full range of services such as audit, tax, M&A consulting, and business process outsourcing (BPO) services.

At THECL, we formed International Tax and Outsourcing Services (ITOS) team, to mainly serve foreign companies in Korea. We are expertise in international tax and accounting services and helping foreign companies has been always a great pleasure for us. We work with every foreign business from small start-ups to high net worth foreign-invested companies.

Because our firm is smaller than national CPA firms, we maintain close relationships with each of our clients. We will answer all of your questions, as they impact both your tax and financial situations. We welcome you to contact us anytime.


We provide services to a wide variety of industries. Our experienced CPAs and para-professionals understand the challenges each of our clients can face. Please let us introduce some of our valuable clients.


Director in THECL Accounting Corporation (US Certified Public Accountant, Licensed in WA)

Song I Yoon is a certified public accountant in the US (Washington) since 2011. She has over 12 years’ experience in providing outsourcing services to foreign companies and foreigners in Korea. She worked as a CPA in GES (Global Employers Services) at Deloitte Tax Group, handling hundreds of expats’ tax consulting/filing services in Korea. She also worked as a leading CPA of International Services at Seonjin Accounting Firm. Just before joining THECL, she took a lead of finance/admin at an IT startup company in Pangyo. She’s very familiar with all the aspects of accounting and tax for the start-up companies doing business in Korea. She graduated from the Ohio State University with a major in accounting.

Partner in THECL Accounting Corporation (Korean Certified Public Accountant)

Heebong Park is a leading partner in International Tax/Outsourcing Services of THECL Accounting Firm. He is a Korean Certified Public Accountant & Certified Tax Accountant. He has over 14 years’ experience in providing various international tax consulting services for global companies. These include tax audit defense, tax appeals, BEPS & TP documentation. Before joining THECL, he worked at PricewaterhouseCoopers (“PWC”) and Deloitte tax group. He also worked at Daewoo Engineering & Construction, as the in-charge CPA for international tax advisory and dispute control. He graduated from Seoul National University. Since 2016, he is enrolled as an external tax advisor in Seoul Tax Office.